Identification Information
Citation
Originator:
Geology Department; Stephen G. Weaver, Colorado College, Department of Geology; Stephanie Brackin, formerly at Beloit College,
Department of Geology; Heather
Cruz, formerly at
Department of Geology; Amy Lunt,
formerly at
formerly
at
formerly
at
formerly
at
Publication Date: 2007
Title:
Open-File Report O-07-09: Preliminary Geologic Map of the
Publication Information:
Publication
Place:
Publisher: Oregon Department of Geology and Mineral Industries
Description:
Abstract: This data set contains the information used to create the Preliminary Geologic Map of the Brown Mountain 7.5’ Quadrangle for Open-File
Report O-07-09. This
map is one of a series of geologic maps created for quadrangles in
south-central
Mountains
just to the west of
of
the U.S. Geological Survey (USGS) 7.5’
geologic units layers, vector format unit boundaries/contacts, collected and analyzed sample location layers, and volcanic centers layers have
been placed. The geologic units and their boundaries were determined based on a combination of field observations and hand sample, thin-section,
and
geochemical analyses and observations of 174 samples collected from within the
collected from adjacent quadrangles. Although the chemistry data and thin-section observations were used in creating the map, the units are
meant to be field-mappable, that is, recognizable by the study of outcrops in the field.
The various layers (geologic units, samples, etc.) of the map were digitized in MapInfo Professional v.7.0 from drawings on paper quadrangles,
UTM coordinates, or maps from student research reports. Samples were collected and analyzed by x-ray fluorescence (XRF) intermittently
between 1984 and 2004. Several samples were also dated using K-Ar or 40Ar/39Ar dating methods. The major and trace elemental chemistry data
and ages are made available in the samples table of this data set.
Purpose: These data were collected and compiled in order to better understand the local geology and geologic history, to create a field-mappable geologic
map
of the
collected chemical and age information that may be useful in various forms of study of this volcanic region. The map is intended for a diverse
audience with varying amounts of geologic understanding. This is one of a series of geologic maps of USGS 7.5’ quadrangles in the south-central
region
of
Supplemental Information: There are several different files and file formats that comprise this data set. The geologic units/formations table, unit
boundaries/contacts table, samples table, and volcanic centers table were created in MapInfo Professional version 7.0 and the .TAB files can be
opened using MapInfo software. These data were later translated to ESRI compatible file formats using the MapInfo Universal Translator
extension. These translated files were then arranged and setup to properly display the data when opened in the ESRI ArcMap software.
There is a MapInfo workspace file
that opens the georeferenced USGS Brown Mountain 7.5’
quadrangle raster image and the other
Mountain tables mentioned above (BrownMtn.WOR). There is also an ArcMap file (.MXD) which contains the georeferenced USGS Brown
Mountain 7.5’ quadrangle and the geologic units, unit boundaries, samples, and volcanic centers shapefiles and accompanying data tables.
Time Period of Content:
Multiple Dates/Times:
Calendar Date: 1984, 1988, 1991, 1994, 1999, 2000, 2002, 2004, 2007
Currentness Reference: ground condition except 2007 is publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Unknown
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -122.375
East Bounding Coordinate: -122.25
North Bounding Coordinate: 42.375
South Bounding Coordinate: 42.25
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: geologic map
Theme Keyword: map of surface geology
Theme Keyword: surface geology
Theme Keyword: volcanoes
Theme
Keyword:
Theme Keyword: volcanic flows
Theme Keyword: lava flows
Theme Keyword: units
Theme Keyword: formations
Theme Keyword: formation boundary
Theme Keyword: Contact
Theme Keyword: samples
Theme Keyword: geochemistry
Theme Keyword: chemistry
Theme Keyword: Age-Dated
Theme Keyword: volcanic center
Theme Keyword: geospatial vector format
Theme Keyword: digital raster graphic
Theme Keyword: drg
Theme Keyword: topographic map
Theme Keyword: topographic quadrangle
Theme Keyword: USGS quadrangle
Place:
Place Keyword Thesaurus: none
Place
Keyword:
Place
Keyword: south-central
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword: Cox
Place Keyword: Cascades
Place
Keyword:
Place Keyword: High Cascade volcanoes
Place
Keyword:
Place Keyword: Pacific Crest Trail
Stratum:
Stratum Keyword Thesaurus: none
Stratum Keyword: surface
Stratum Keyword: surface geology
Stratum Keyword: surficial
Stratum Keyword: surficial formations
Stratum Keyword: surface formations
Stratum Keyword: upper strata
Stratum Keyword: surface strata
Stratum Keyword: volcanic strata
Stratum Keyword: volcanic
Stratum Keyword: surficial volcanic deposits
Stratum Keyword: lava flows
Stratum Keyword: surficial lava flow
Temporal:
Temporal Keyword Thesaurus: none
Temporal Keyword: 22 Ma
Temporal Keyword: 22 million years
Temporal Keyword: present
Temporal Keyword: 22 million years to the present
Temporal Keyword: late Cenozoic
Temporal Keyword: upper Cenozoic
Temporal Keyword: Tertiary to Quaternary
Temporal Keyword: Middle Tertiary to Quaternary
Temporal Keyword: Neogene to Quaternary
Temporal Keyword: Middle Neogene to Quaternary
Temporal Keyword: Miocene
Temporal Keyword: Pliocene
Temporal Keyword: Pleistocene
Temporal Keyword: Holocene
Temporal Keyword: Miocene to Holocene
Temporal Keyword: Early Miocene to Holocene
Temporal Keyword: Lower Miocene to Holocene
Access Constraints: none
Use Constraints: Acknowledgement of the authors and the Oregon Department of Geology and Mineral Industries would be appreciated in products derived
from these data.
Point of Contact:
Contact
Person Primary:
Contact Address:
Address Type: mailing and physical address
Address:
City:
State or Province:
Postal Code: 17604
Contact Voice Telephone: 1-717-291-3818
Contact Electronic Mail Address: stan.mertzman@fandm.edu
Contact Instructions: contact via electronic mail is preferred
Browse Graphic:
Browse Graphic File Name: BrownMtnMap30x36.pdf
Browse Graphic File Description: The BrownMtnMap30x36.pdf file contains the Preliminary Geologic Map of the Brown Mountain 7.5’
Quadrangle of Open-File Report 07-09. This map was made from the data provided in this data set. The basic image in this map (the 1988
USGS Brown Mountain 7.5’ quadrangle overlain by the formations, formation boundaries/contacts, and the sample symbols) was created in
MapInfo Professional version 7.0 using the data available in this data set (BrownMtnQuadforTransparent.TAB, BrownMtnFormations.TAB,
BrownMtnFormationBounds.TAB, and BrownMtnSamples.TAB). This image was exported from MapInfo Professional v. 7.0 as a Photoshop
Document (.PSD) at a zoom of 1 inch = 1.4 miles, a window size of 8 miles (in the export options, the actual window size was doubled from
5.72 inches to 11.44 inches), and with a resolution of 600 pixels per inch. The colors of the resulting .PSD file were adjusted to match USGS
CMYK color standards in Adobe Photoshop CS3. The image was then imported into Adobe Illustrator CS3 where its size was increased by 184.7999%
to make the map scale 1:24,000. The sample’s map numbers, the formation labels, and the rest of what is seen on the map, such as the time rock chart
and the legend, were added to the map in Adobe Illustrator CS3. The resulting 30 inch x 36 inch Adobe Illustrator image was saved as a Portable
Document Format (.PDF) file and the result is the image of the geologic map seen in the file BrownMtnMap30x36.pdf.
Browse Graphic File Type: PDF
Native Data Set Environment: The majority of the data files in the data set used to make the Preliminary Geologic Map of the Brown Mountain 7.5’ Quadrangle
of Open-File Report 07-09 were originally created using MapInfo Professional software version 7.0 running under a Microsoft Windows 2000 Professional
operating system. The data that were digitized in this environment were the geologic formations, the formations boundaries, the sample locations, and the
volcanic
centers layers. The USGS 7.5’
However, in order to make a version of this USGS quadrangle that would make the white and green areas of the USGS quadrangle transparent, so that the
map could overlay the formations layer and the formations could show through, the USGS quadrangle was modified from its original copy. This modification
was done using Adobe Photoshop version 5 and the resulting image of the quadrangle was manually georeferenced in MapInfo Professional version 7.0. The
data were
at times accessed and modified in MapInfo Professional version 7.0 running
under a Microsoft XP operating system. The data from the
Mountain quadrangle samples table have been exported from MapInfo Professional version 7.0 at least one time and opened in Microsoft Excel for addition or
modification of certain attributes, particularly chemistry data. The Microsoft Excel file was then reopened in MapInfo Professional version 7.0. The files of this
data set
have been saved and backed-up on various hard drives at various times. The most
up-to-date MapInfo Professional formatted files (
PSD, TAB, TFW, TIF, and WOR) have a total size of 63.6 MB.
After the data set had been produced in MapInfo Professional version 7.0, the files were converted using MapInfo’s Universal Translator extension to produce
files that could be opened with ESRI ArcMap software version 9.2. This was done by converting the MapInfo TAB files into ESRI SHP format files. The USGS
quadrangle was reopened and georeferenced anew within ESRI ArcMap. Further modification of the data files occurred within ESRI ArcMap, such as adjustment
of attribute names in the attribute table, adjustment of symbol shapes and colors, and setting of the formation regions’ colors.
Data Quality Information
Attribute Accuracy:
Attribute Accuracy Report: The attribute accuracy was tested in several ways. For sample, formation boundary, and volcanic center location
attributes (UTM coordinates), accuracy was assessed by comparison of on screen representations of the location (digital maps on the computer screen)
to hard copy versions (hand drawn or similarly-demarcated locations and boundaries on top of paper USGS quadrangles). On several occasions,
the digitized versions of the Brown Mountain 7.5’ quadrangle were printed out on paper with the symbol locations and formation boundaries demarcated.
The print-out was then assessed by the chief geologist of the project, Stanley A. Mertzman.
The UTM coordinates of the samples provided in the attribute table have a precision that does not reflect that with which their location on the map was
determined. The precision reflects the assigned values that were assigned using MapInfo Professional verion 7.0’s Coordinate Extractor extension after
manual
placement of the sample locations on the DRG of the USGS 7.5’
quadrangles on which locations were drawn, or in some cases, based on previously-rounded (to the nearest 10 m) coordinates for samples not shown
on the paper map(s). The accuracy of the locations drawn on the original paper maps may vary. Prior to the year 2000, sampling locations were originally
determined by use of a Brunton compass in the field and these data were later translated to the 1:24,000 USGS 7.5’ quadrangles using plastic overlay cards
demarcated with 1:24000 scale UTM coordinate distances. After the year 2000, Magellan GPS units were used to determine the location of collected samples
in the field, and again these coordinates were placed on the 1:24,000 scale USGS quadrangles using the appropriate plastic overlay card with UTM units.
The Public Land Survey System (PLSS)
attributes (¼ of ¼ Section, ¼ Section, Section, Township, and Range) in the
created in a manner so as to be as accurate as possible, but have not been tested for accuracy beyond the checks that occurred during their production. The
Township and Range attribute values were assigned by selection of all samples that occurred within either manually created or downloaded polygons of the
Township and Range boundaries. Samples near the edges of a Township or Range grid line were more carefully studied on the screen to check that the sample
really
did lie within the supposed Township. The Section attribute was assigned based
on a sample’s location as represented on the DRG of the
quadrangle in MapInfo.
The ¼ of ¼ Section and ¼ Section attributes were assigned for each sample based on downloaded grids which displayed the boundaries of the ¼ of ¼ Sections
and ¼ Sections of Townships. Because the Section and Township boundaries did not always line up perfectly with those of the underlying quadrangle DRG,
at times attributes of samples close to lines in this grid had to be assigned based on mental adjustments or at times, the use of a ruler held up to the screen, by a
technician. For this reason, the accuracy of the ¼ of ¼ Section and ¼ Section attributes may be questionable in some cases, particularly in those samples which
lie close to the boundaries which demarcate these location descriptors.
The accuracy of a sample’s Unit attribute was tested by a visual check of the sample’s location in relation to the unit boundaries as displayed in MapInfo
Professional version 7.0.
The accuracy of the chemical data is dependent on many factors not discussed here. The samples were analyzed by x-ray fluorescence (XRF) at various times
and possibly by different machines. All that will be said is that the accuracy of the XRF chemical data is monitored and assessed by using an instrument monitor
(to account for local climate and machine conditions on the day of measurement), by running several well-measured standards in every batch, and by analyzing
the totals counts. That the chemical attributes of each sample in the data table match the originally assigned data from the XRF instrument was tested by the
comparison of several of the samples to the original Excel data files. All of the chemical data were derived from these original Excel files, or from transposed
and
combined versions of these files, except for several of the age-dated samples,
which may have values copied from a previous publication by
Mertzman.
The colors of the units are consistent between adjacent quadrangles mapped in this project and were created as the RGB (only color mode allowed in MapInfo
Professional version 7.0) equivalents of standard USGS CMYK colors.
Logical Consistency Report: The boundaries of the
intersections, overlaps, and gaps using MapInfo Professional version 7.0 and no such problems were detected. The edges of unit polygons have also been checked
against those mapped as part of this project, but available in other data sets. All of the boundaries were found to fit and all of the points at the quadrangle corners were
found to align perfectly. The formations boundaries polylines (from the file BrownMtnFormationBounds) were drawn in a separate layer on top of the formations layer
using the trace function that is available in the MapInfo Professional version 7.0 software.
There are some points with
duplicate coordinates in the
the same location or possibly from multiple analyses of the same sample collected from a particular location.
Completeness Report:
All field-mappable units and unit boundaries
in the USGS 7.5’
within the
USGS 7.5’
Professor Stanley A. Mertzman, his colleagues, and students have been mapped. All chemistry results from the XRF analyses have been included in the samples
data file (BrownMtnSamples) have been included in the attributes table. All map numbers, sample numbers, ages (applicable only to dated samples) in millions of years
(Ma), Public Land Survey System (PLSS: ¼ of ¼ Section, ¼ Section, Section, Township, and Range), UTM coordinates (North American Datum of 1927: Zone 10),
unit membership, and lithology (based on the total alkalis versus silica (TAS) classification method for volcanic rocks described by Le Maitre (2002)) have been included
in the
attribute table of the sample data file. All known faults within the quadrangle
have been mapped, and because none are known to exist within the
quadrangle, no faults layer exists.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: The horizontal positional accuracy of the digitized data with regard to the original paper maps has
been checked by visual comparison of the digitized sample locations, formation boundaries, and volcanic centers to the original paper maps when possible.
The positional accuracy of the original sample locations on the original paper maps may vary depending on the methods used as discussed above. The
positions of the unit boundaries are approximate and their accuracy has not necessarily been field tested. Analysis of the collected samples (chemistry,
hand-sample, and thin sections) and familiarity with the area from lots of time spent in the field by experienced geologists ought to ensure reasonable
accuracy of the mapped unit boundaries, although this is not quantifiable.
Lineage:
Source Information:
Source Citation:
Originator:
Publication Date: 1988
Title:
Edition: Provisional Edition 1988 Geospatial Data Presentation Form: map and raster digital data (digital raster graphic (drg)) of map
Series Information:
Series Name:
Series Issue:
Publication Information:
Publication
Place:
Publisher:
Other Citation Details: A drg of this map
can be downloaded from the
Online Linkage: UO Libraries website: http://libweb.uoregon.edu/dc/24k_lookup/displaymap.php?ohio_code=42122c3
Source Scale Denominator: 24,000
Type of Source Media: Paper and Online
Source Time Period of Content:
Time Period Information:
Multiple Dates/Times:
Calendar Dates: 1982, 1984, 1985, 1988
Source Currentness Reference: 1982 and 1984 correspond to years in which aerial photographs were taken, the map was field checked in 1985, and
the publication date was 1988. The year of production of the particular drg used in the dataset is not currently known.
Source Citation Abbreviation: 42122c3
Source Contribution: The USGS Brown Mounain 7.5 minute paper quadrangle was used as the base map on which the geology of the quadrangle was
mapped by
the base map for this data set onto which the sample locations, units, and volcanic centers were copied (digitized) from a paper version (or
versions) of the map(s) produced by the geologists involved in this project.
Process Step:
Process Description: The first step in the production of this data set was the collection of samples and observations from the field. The samples’ chemistries
were determined by x-ray fluorescence spectroscopy. The hand samples were carefully analyzed and described. Thin sections allowed further
description of certain samples. A sample’s collection location was determined in the field using a Brunton compass prior to 2000, and with a Magellan
GPS unit after
2000. The sample locations were marked on paper versions of the USGS
7.5’
using a georeferenced (to the North American Datum of 1927 (NAD 27) zone 10 horizontal datum) drg of the quadrangle in MapInfo Professional
version 7.0 by placing a point (node) in a layer over the drg at a sample’s location on the papermap. This process was the first step in the production
of the
table.
The BrownMtnSamples attribute table was exported at least one time to Microsoft Excel, where other sample attributes were added and or modified (such
as lithology and chemistry data). These Excel spreadsheets were then imported back into MapInfo Professional version 7.0 and the previously extracted UTM
coordinates
were used to re-plot the sample locations on top of the quadrangle drg. The drg of the quadrangle
was also used in assigning the
and Section attributes to the samples.
The combination of the analyses of collected samples and familiarity with the area from a lot of time spent in the field allowed Stanley A. Mertzman to
discriminate
between and determine the units present within the
the paper USGS 7.5’ topographic maps. These boundaries were then digitized in the same manner as the sample locations, by copying their locations on the
paper map
to a MapInfo layer on top of a drg of the same map
(USGS 7.5’
Professional version 7.0. The boundary of the unit on the map was digitized as the boundary of the polygon in MapInfo. The formation polygons were
colored based on RGB equivalents of standard USGS CMYK colors. The formation ages, names, and symbols (abbreviated names) were added to the attribute
table at a layer stage of the process. It was decided that a separate layer (file) should be made for the formation boundaries (contacts) within the quadrangle
because the edges of the unit polygons did not necessarily correspond to the actual unit boundaries. The edges of the unit polygons were limited by the
quadrangle
boundaries, so although many units extend beyond the boundaries of the
to the area of the quadrangle.
In order to make a layer (BrownMtnFormationBounds) that corresponded to the actual unit boundaries (surface contacts between two formations), the true
unit boundaries (not those cut off at the quadrangle’s edges) were made by tracing (using MapInfo’s trace function) the all of the unit polygons’ edges, except
those that corresponded with the 4 sides of the quadrangle. This process created the polylines that now represent the formation boundaries in this data set. The
volcanic centers’ locations were originally determined from field observations and sample analyses. Their locations were marked on a paper version of the
quadrangle with temporary stickers and then digitized by copying the location to the identical spot on the drg of the quadrangle.After the completion of all of
the necessary files in MapInfo, the MapInfo Universal Translator Extension was used to convert the MapInfo-formatted data set to ESRI-format files. This
involved converting the mapinfo TAB files of the formations polygons, formation boundaries polylines, sample points, and volcanic center points to
shapefiles (SHP). These files were opened and adjusted in ESRI ArcMap version 9.2. The digital versions of the sample collection locations; formations
and formations boundaries; and the volcanic centers locations were checked by visual comparison of the digital data on the computer screen (in MapInfo)
or on printed copies to the original source paper maps and final printed or digital (PDF) versions of the resulting maps were assessed by the chief geologist
of this project, Stanley A. Mertzman.
Source Used Citation Abbreviation: 42122c3
Process Date: 2007
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: Isaac Weaver
Contact Position: Research Assistant
Contact Address:
Address Type: mailing and physical address
Address: Isaac Weaver,
City:
State or
Province:
Postal Code: 17604
Contact Voice Telephone: Unavailable
Contact Electronic Mail Address: iweaver@fandm.edu
Indirect Spatial Reference: This data set contains files with point data locations at which rock samples were collected from outcrops, polygons of the
formations,
polylines of the formation boundaries (contacts), and
volcanic center locations for the U.S. Geological Survey 7.5 minute
Direct Spatial Reference Method: Point, Vector, and Raster
Horizontal Coordinate System Definition:
Planar:
Grid Coordinate System:
Grid Coordinate System Name: Universal Transverse Mercator
Universal Transverse Mercator:
UTM Zone Number: 10
Transverse Mercator:
Scale
Factor at
Longitude
of
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000
Planar Coordinate Information:
Planar Coordinate Encoding Method: coordinate pair
Coordinate Representaion:
Abscissa Resolution: 0.01
Ordinate Resolution: 0.01
Planar Distance Units: meters
Geodetic Model:
Horizontal Datum Name: North American Datum of 1927
Ellipsoid Name: Clarke 1866
Semi-major Axis: 6378206.4
Denominator of Flattening Ratio: 294.9787
Detailed Description:
Entity Type:
Entity Type Label: Unit/Formation
Entity Type Definition: A formation or unit, with regard to this data set, is a body of rock with a limited range of lithological characteristics (as determined
by analyses of outcrops and samples in the field and in the laboratory) that can be distinguished from other bodies of rocks by observations made in
the field (such as analysis of outcrops or hand-samples collected from them). That is to say, a unit/formation is field-mappable according to the
definition used in the creation of this data set. Nevertheless, the chemistry data and other observations not possible in the field were still considered
in
determining the formations. In the
A unit/formation has an age (or age-range), which has been determined by dating of collected samples. It should be noted that the vent deposit units
(Qbv and Qav) may display similar macroscopic lithologies, but are perhaps best described as sub-units of the units in which they are found. Samples
collected from these deposits are considered a part of the unit in which the vent deposits are found. Detailed descriptions of the units/formations found
within
the
colored polygons with edges placed at their approximate locations.
Entity
Type Definition Source: See Mertzman et al. (2007)
for detailed descriptions of the units/formations found within the
Attribute:
Attribute Label: Symbol
Attribute Definition: The symbol is a form of shorthand text, specific to a unit/formation, that is created by combining age information with an abbreviated
form of the unit/formation name. The symbol attribute is meant to be displayed on the final geologic map to save space or can be displayed when
viewing the data on a computer. It is intended that the symbol convey age, lithology, and formation name information. The first letter is capitalized
and represents the period-age of the formation (T=Tertiary and Q=Quaternary). If the first letter of the symbol is a capital T, then the second letter
represents the epoch-age of the formation (p=Pliocene and m=Miocene). It should be noted that these first two letters only represent the oldest dated
age of the formation. Therefore, a formation may span in age from period to period or epoch to epoch, but this cannot be discerned from the symbol.
The remaining letters indicate the lithology of the formation and its name. The lithology (b=basalt, ba= basaltic andesite, and a=andesite, for volcanic
units) comes first in the abbreviation of the formation’s name.
Attribute Definition Source: None
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Qal
Enumerated Domain Value Definition: Alluvium (Holocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qav
Enumerated Domain Value Definition: Basaltic andesite / andesite vent deposits (Upper Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qabm
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbbb
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbv
Enumerated Domain Value Definition: Basaltic vent deposits (Middle Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbrb
Enumerated Domain Value Definition: Basalt of Robinson Butte (Middle Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpbbm
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpbao
Enumerated Domain Value Definition: Basaltic Andesite of Old Baldy (Middle Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpbcb
Enumerated
Domain Value Definition: Basalt of Cox
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpbdp
Enumerated Domain Value Definition: Basalt of Daley Prairie (Middle Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpais
Enumerated Domain Value Definition: Andesite of Ichabod Spring (Middle Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpafl
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tpbmp
Enumerated Domain Value Definition: Basalt of Moon Prairie (Lower Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tmaob
Enumerated Domain Value Definition: Andesite of Old Baldy East (Upper Miocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tmbab
Enumerated Domain Value Definition: Basaltic Andesite of Beaver Dam Creek (Upper Miocene to Lower Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tmbpb
Enumerated Domain Value Definition: Basalt of Pole Bridge Creek (Upper Miocene to Lower Pliocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Tmvhf
Enumerated Domain Value Definition: Heppsie Formation (Lower Miocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Attribute:
Attribute Label: Name
Attribute Definition: The Name attribute represents the name of formation/unit of which the entity is a part. The Name (in most cases) combines
information on the lithology of the formation with a geographic feature located within the formation’s boundary, such as a mountain or a
body of
water. Detailed descriptions of the units/formations found within the
Report O-07-09 (Mertzman et al., 2007).
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Alluvium
Enumerated Domain Value Definition: Unconsolidated sediment found in close proximity to modern drainages. Holocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Andesite Vent Deposit
Enumerated Domain Value Definition: Poorly lithified to unconsolidated lapilli to ash-sized cinders black to brown to
red in color with lesser amounts of similarly colored lava spatter, bombs, and scoria. These deposits mark volcanic vents areas
that are often cinder cones. Upper Pleistocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Andesite
of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basalt of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basaltic Vent Deposits
Enumerated Domain Value Definition: Poorly lithified to unconsolidated lapilli to ash-sized cinders black to brown to red in color with
lesser amounts of similarly colored lava spatter, bombs, and scoria. These deposits mark volcanic vents areas that are often
cinder cones. Middle Pleistocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basalt of Robinson Butte
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basalt of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basaltic Andesite of Old Baldy
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basalt of Cox
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basalt of Daley Prairie
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Andesite of Ichabod Spring
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Andesite
of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basalt of Moon Prairie
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Andesite of Old Baldy East
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basaltic Andesite of Beaver Dam Creek
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basalt of Pole Bridge Creek
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Heppsie Formation
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-09 (Mertzman et al., 2007).
Attribute:
Attribute Label: Age_Geologic_Time_Scale
Attribute Definition: The Age_Geologic_Time_Scale represents the age of a formation/unit in terms of the “Stage Age” (convention not completely
followed, only Lower, Middle, and Upper are used as classes in this naming category) and “Series Epoch” classifiers of the 2007 International
Stratigraphic Chart (International Commission on Stratigraphy, 2007) as defined by dates calculated by Gradstein et al. (2004). The attribute
value was determined by a comparison of a unit’s dated age(s) to the stratigraphic age boundaries in the 2007 International Stratigraphic Chart
(International Commission on Stratigraphy, 2007). A range of geologic time scale ages may be provided for a unit due to a range of ages
calculated for one or more samples therein by K-Ar or 40Ar/39Ar. This attribute provides a low resolution representation of the age of a formation .
Attribute Definition Source: See Mertzman et al. (2007), International Convention on Stratigraphy (2007), and Gradstein et al. (2004)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Holocene
Enumerated Domain Value Definition: < 0.0115 Million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Upper Pleistocene
Enumerated Domain Value Definition: 0.126- 0.0115 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004)., International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Middle Pleistocene
Enumerated Domain Value Definition: 0.781 – 0.126 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Lower Pleistocene
Enumerated Domain Value Definition: 1.806 - 0.781 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Upper Pliocene
Enumerated Domain Value Definition: 2.588 – 1.806 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Middle Pliocene
Enumerated Domain Value Definition: 3.600 – 2.588 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Lower Pliocene
Enumerated Domain Value Definition: 5.332 – 3.600 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Upper Miocene
Enumerated Domain Value Definition: 11.608 – 5.332 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Middle Miocene
Enumerated Domain Value Definition: 15.97 – 11.608 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Enumerated Domain:
Enumerated Domain Value: Lower Miocene
Enumerated Domain Value Definition: 23.03 – 15.97 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and Mertzman et al.
(2007)
Attribute:
Attribute Label: Age_Ma
Attribute Definition: The Age_Ma attribute describes the absolute age or age-range of a formation in millions of years as determined by the dating of
collected samples with K-Ar or 40Ar/39Ar methods. The values are presented with the calculated ages and their error ranges. All units have been
age-dated using either of the two mentioned radiometric dating methods mentioned above, except for the Qal or Quaternary alluvium. The Range
Domain described below pertains to the radiometrically dated samples. The value for the Qal unit is “unknown Quaternary (<1.806 Ma).”
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <0.1 Ma
Range Domain Maximum: 21.73 +/- 0.14 Ma
Attribute Units of Measure: Millions of years (Ma)
Detailed Description:
Entity Type:
Entity Type Label: Formation Boundary
Entity Type Definition Source: A Formation Boundary is the same as a contact. It is the ground-surface (or its trace on the surface, if buried) boundary
between two units/formations. In this data set, they are polylines traced on the unit polygon boundaries (except at those that corresponded with
the edges of the quadrangle). The contacts have been approximately l ocated. The formation boundary entities contain no attribute information.
Entity Type Definition Source: None
Attribute:
Attribute Label: BrownMtnFormationB
Attribute Definition: This attribute contains no information and was created by MapInfo Professional version 7.0 when the polylines were created
with that program. Each row in this attribute column corresponds to a polyline within the data set.
Attribute Definition Source: None
Detailed Description:
Entity Type:
Entity Type Label: Sample
Entity Type Definition: A sample, with regard to this data set, is a field-collected rock specimen from an in situ outcrop (lava flows or vent deposits) located
within
the
for the following possible types of analysis: hand-sample analysis with possible use of a hand lens and other tools; chemical analysis by x-ray
fluorescence spectroscopy (all samples); thin section analysis; age-dating by either K-Ar or 40Ar/39Ar methods. Samples can be displayed as point data.
In the BrownMtnSamples files, sample collection locations are indicated with either a black triangle or with a yellow square with a black outline. The
black triangles represent samples for which there are available chemistry data in the attributes table. The yellow squares represent samples that have
been age-dated by K-Ar or 40Ar/39Ar dating methods and also have chemistry data in the data table (attribute table).
Entity Type Definition Source: See Mertzman et al. (2007)
Attribute:
Attribute Label: Map_No
Attribute Definition: The Map_No is the map number. It was assigned sequentially to all of the samples after they were organized by age, formation,
and silica content. The samples and their data were organized first by the formation, from oldest to youngest formation. Within each formation the data
were further organized by placing age- dated samples before samples that were not age-dated. The age-dated samples for each formation were arranged
by silica content, from lowest to highest silica content. Then the non-age-dated samples for each formation were arranged by silica content, from lowest
to highest. After the data were organized, the map numbers were assigned sequentially down the data table from 1 to 174.
Attribute Definition Source: None
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1
Range Domain Maximum: 174
Attribute
Attribute Label: Sample_No
Attribute Definition: The Sample_No is the combination of numbers and possibly letters that was assigned to a sample when it was collected in the
field, or shortly thereafter. The letters indicate the initials of the person who collected the sample and the first two numbers represent the last two digits
of the year in which the sample was collected. After the first two numbers is a dash followed by a unique number that indicates a sample’s place in the
order of collection for a particular year.
Attribute Definition Source: None
Attribute Domain Values:
Unpresentable Domain: The values of this attribute were created in a certain way, but they are not numerical and there is no very easy way to describe
the domain of these values without creating a sizeable list of the actual values. It is best to understand how the Sample_No attribute was assigned
as discussed in the Attribute Definition above.
Attribute:
Attribute Label: KAr_Age_Ma
Attribute Definition: The KAr_Age_Ma is a sample’s absolute age in millions of years as determined by K-Ar or 40Ar/39Ar dating methods. Not all
samples
collected in the
Attribute Definition Source: Consult Mertzman et al. (2007)
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.40 +/- 0.30
Range Domain Maximum: 6.14 +/- 0.15
Attribute Units of Measure: Millions of years (Ma)
Attribute:
Attribute Label: Qrtr_of_Qtr
Attribute Definition: The Qrtr_of_Qtr attribute concerns the quarter-quarter section classifier of the Public Land Survey System (PLSS). This
attribute describes in what quarter (NW, NE, SE, SW) of a quarter section of a township a sample was collected. All Township descriptors are
according to the grid defined by the Willamette Meridian and Willamette Base Line of the PLSS.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: NW
Enumerated Domain Value Definition: The northwest quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: NE
Enumerated Domain Value Definition: The northeast quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SE
Enumerated Domain Value Definition: The southeast quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SW
Enumerated Domain Value Definition: The southwest quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Attribute:
Attribute Label: Qtr_of_Sec
Attribute Definition: The Qtr_of_Sec attribute concerns the quarter section classifier of the (PLSS). This attribute describes in what quarter (NW, NE,
SE, SW) section of a township a sample was collected. All Township descriptors are according to the grid defined by the Willamette Meridian and
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: NW
Enumerated Domain Value Definition: The northwest quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: NE
Enumerated Domain Value Definition: The northeast quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SE
Enumerated Domain Value Definition: The southeast quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SW
Enumerated Domain Value Definition: The southwest quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Attribute:
Attribute Label: Sec
Attribute Definition: The Sec is the Section of the Township according to the PLSS grid in which the sample was collected. The Section is
“a one-square-mile block of land, containging 640 acres, or approximately one thirty-sixth of a township. Due to the curvature of the
Earth, sections may occasionally be slightly smaller than one square mile.” All Township descriptors are according to the grid defined by the
Willamette
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1
Range Domain Maximum: 36
Attribute:
Attribute Label: T_S
Attribute Definition: The T_S (Township_South) is the value of the horizontal row of townships in the PLSS grid (Willamette Meridian and Willamette Base
Line) in which the sample was collected. The “S” (South) descriptor indicates that the township rows that pertain to this data set are south of the
Township in the Willamette Meridian and Base Line defined grid of the PLSS in which the sample was collected. The other more specific PLSS
descriptor attributes were described and discussed above.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 37
Range Domain Maximum: 38
Attribute:
Attribute Label: R_E
Attribute Definition: The R_E (Range_East) is the value of the vertical column of townships in the PLSS grid (Willamette Meridian and
Willamette Base Line) in which the sample was collected. The “E” (East) descriptor indicates that the township columns that pertain to this data set
are to the East of the Willamette Meridian. When combined with the T_S attribute value, this information provides the specific ~36 square mile
Township in the Willamette Meridian and Base Line defined grid of the PLSS in which the sample collected. The other more specific PLSS
descriptor attributes were described above.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 4
Range Domain Maximum: 5
Attribute:
Attribute Label: UTM_E_m
Attribute Definition: This is the easting value in meters of a sample’s collection location according to the NAD 1927 UTM Zone 10 projection system.
This value was determined with the MapInfo Professional version 7.0 Coordinate Extractor extension.
Attribute Definition Source: Consult http://erg.usgs.gov/isb/pubs/factsheets/fs07701.html
Attribute Domain Values:
Range Domain:
Range
Domain Minimum: 551,582.66
Range Domain Maximum: 561,796.32
Attribute Units of Measure: meters
Attribute Label: UTM_N_m
Attribute Definition: This is the northing value in meters of a sample's collection location according to the NAD 1927 UTM Zone 10 projection system. This
value was Determined with the MapInfo Professional version 7.0 Coordinate Extractor extension.
Attribute Definition Source: Consult http://erg.usgs.gov/isb/pubs/factsheets/fs07701.html
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 4,677,562.25
Range Domain Maximum: 4,691,449.77
Attribute Units of Measure: meters
Attribute:
Attribute Label: Unit
Attribute Definition: This is the unit, indicated by the unit’s Symbol, to which a collected sample belongs.
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Qabm
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbbb
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbrb
Enumerated Domain Value Definition: Basalt of Robinson Butte (Middle Pleistocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpbbm
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpbao
Enumerated Domain Value Definition: Basaltic Andesite of Old Baldy (Middle Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpbcb
Enumerated
Domain Value Definition: Basalt of Cox
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpbdp
Enumerated Domain Value Definition: Basalt of Daley Prairie (Middle Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpais
Enumerated Domain Value Definition: Andesite of Ichabod Spring (Middle Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpafl
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tpbmp
Enumerated Domain Value Definition: Basalt of Moon Prairie (Lower Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tmaob
Enumerated Domain Value Definition: Andesite of Old Baldy East (Upper Miocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tmbab
Enumerated Domain Value Definition: Basaltic Andesite of Beaver Dam Creek (Upper Miocene to Lower Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Tmbpb
Enumerated Domain Value Definition: Basalt of Pole Bridge Creek (Upper Miocene to Lower Pliocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Attribute:
Attribute Label: Lith
Attribute Definition: The Lith attribute is an abbreviation of the lithology of the sample according to the total alkali (Na2O + K2O (weight%(wt%)))
versus silica (SiO2 wt%) classification (TAS classification) of Le Maitre (2002). The chemistry of the sample was determined by x-ray
fluorescence (XRF) spectroscopy. Macroscopic characteristics of the various lithologies are not discussed here.
Attribute Definition Source: See Mertzman et al. (2007) and Le Maitre (2002)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: TrB
Enumerated Domain Value Definition: Trachybasalt: a volcanic rock with a silica (SiO2) content of 45-52 wt% and a total
alkali (Na2O + K2O wt%) content of greater than or equal to 5 wt%.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007) and Le Maitre (2002)
Enumerated Domain:
Enumerated Domain Value: B
Enumerated Domain Value Definition: Basalt: a volcanic rock with a silica content of 45-52 wt% and less than 5 wt% total alkali
content.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007) and Le Maitre (2002)
Enumerated Domain:
Enumerated Domain Value: BA
Enumerated Domain Value Definition: Basaltic Andesite: a volcanic rock with 52-57 wt% silica content and a total alkali content
of less that 5 wt% at 52 wt% SiO2 and less than 5.9 wt% at 57 wt% SiO2. Between 52 and 57 wt% SiO2, the upper total
alkali boundary increases linearly from 5 to 5.9 wt%.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007), Le Maitre (2002) and
http://www.geol.lsu.edu/henry/Geology3041/lectures/02IgneousClassify/IUGS-IgneousClassFlowChart.htm
Enumerated Domain:
Enumerated Domain Value: A
Enumerated Domain Value Definition: Andesite: a volcanic rock with a silica content of 57-63 wt% and a total alkali content of less
than 5.9 wt% at 57 wt% SiO2 and less than 7 wt% at 63 wt% SiO2. Between 57 and 63 wt% SiO2, the upper total alkali
boundary increases linearly from 5.9 wt% to 7 wt%.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007), Le Maitre (2002), and
http://www.geol.lsu.edu/henry/Geology3041/lectures/02IgneousClassify/IUGS-IgneousClassFlowChart.htm
Attribute:
Attribute Label: SiO2_%
Attribute Definition: The weight percent (wt%) of silica (SiO2) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 48.39
Range Domain Maximum: 60.13
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: TiO2_%
Attribute Definition: The weight percent (wt%) of titanium (SiO2) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.59
Range Domain Maximum: 1.29
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Al2O3_%
Attribute Definition: The weight percent (wt%) of aluminum (Al2O3) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 14.67
Range Domain Maximum: 19.50
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Fe2O3_%
Attribute Definition: The weight percent (wt%) of ferric iron (Fe2O3) in the sample as calculated using results measured by XRF
spectroscopy and Iron Titration. Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.65
Range Domain Maximum: 9.75
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: FeO_%
Attribute Definition: The weight percent (wt%) of ferrous Iron (FeO) in the sample determined by Iron Titration.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1.25
Range Domain Maximum: 7.94
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: MnO_%
Attribute Definition: The weight percent (wt%) of manganese (MnO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.08
Range Domain Maximum: 0.17
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: MgO_%
Attribute Definition: The weight percent (wt%) of magnesium (MgO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 2.62
Range Domain Maximum: 11.10
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: CaO_%
Attribute Definition: The weight percent (wt%) of calcium (CaO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 5.53
Range Domain Maximum: 10.96
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Na2O_%
Attribute Definition: The weight percent (wt%) of sodium (Na2O) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 2.45
Range Domain Maximum: 4.67
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: K2O_%
Attribute Definition: The weight percent (wt%) of potassium (K2O) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.17
Range Domain Maximum: 2.45
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: P2O5_%
Attribute Definition: The weight percent (wt%) of phosphorous (P2O5) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.08
Range Domain Maximum: 0.75
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: LOI_%
Attribute Definition: True Loss on Ignition: the amount of weight lost or gained (weight percent (wt%)) by the sample after heating to between 900ºC
and 950ºC for one hour added to a value that accounts for the changes in weight resulting from the oxidation of ferrous iron.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.16
Range Domain Maximum: 3.27
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Total_%
Attribute Definition: The total weight percent (wt%) is the sum of the weight percent values for SiO2, TiO2, Al2O3, Fe2O3, FeO, MnO,
MgO, CaO, Na2O, K2O, P2O5, and LOI.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 99.00
Range Domain Maximum: 103.13
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Fe2O3T_%
Attribute Definition: The ferric iron content (wt%) measured by XRF spectroscopy. This is not the true amount of ferric iron originally present in the
rock sample because it also accounts for ferrous iron that was oxidized to ferric iron during the preparation for XRF.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 5.70
Range Domain Maximum: 10.98
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Rb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of rubidium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.8
Range Domain Maximum: 34.8
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Sr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of strontium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 458
Range Domain Maximum: 2246
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Y_ppm
Attribute Definition: The amount (in parts per million (ppm)) of yttrium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 10.9
Range Domain Maximum: 43
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Zr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of zirconium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 31
Range Domain Maximum: 206
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: V_ppm
Attribute Definition: The amount (in parts per million (ppm)) of vanadium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 17
Range Domain Maximum: 254
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ni_ppm
Attribute Definition: The amount (in parts per million (ppm)) of nickel present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 9
Range Domain Maximum: 389
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Cr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of chromium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 11
Range Domain Maximum: 636
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Nb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of niobium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1.2
Range Domain Maximum: 16.6
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ga_ppm
Attribute Definition: The amount (in parts per million (ppm)) of gallium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 15.2
Range Domain Maximum: 23.6
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Cu_ppm
Attribute Definition: The amount (in parts per million (ppm)) of copper present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 11
Range Domain Maximum: 253
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Zn_ppm
Attribute Definition: The amount (in parts per million (ppm)) of zinc present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 53
Range Domain Maximum: 129
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Co_ppm
Attribute Definition: The amount (in parts per million (ppm)) of cobalt present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 11
Range Domain Maximum: 46
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ba_ppm
Attribute Definition: The amount (in parts per million (ppm)) of barium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 37
Range Domain Maximum: 2030
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: La_ppm
Attribute Definition: The amount (in parts per million (ppm)) of lanthanum present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 3
Range Domain Maximum: 50
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ce_ppm
Attribute Definition: The amount (in parts per million (ppm)) of cesium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 12
Range Domain Maximum: 114
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: U_ppm
Attribute Definition: The amount (in parts per million (ppm)) of uranium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.1
Range Domain Maximum: 4.5
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Th_ppm
Attribute Definition: The amount (in parts per million (ppm)) of thorium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.1
Range Domain Maximum: 11.3
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Sc_ppm
Attribute Definition: The amount (in parts per million (ppm)) of scandium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 9
Range Domain Maximum: 40
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Pb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of lead present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.3
Range Domain Maximum: 13
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Yb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of ytterbium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.7
Range Domain Maximum: 2.9
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Be_ppm
Attribute Definition: The amount (in parts per million (ppm)) of beryllium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.9
Range Domain Maximum: 2.0
Attribute Units of Measure: parts per million (ppm)
Detailed Description:
Entity Type:
Entity Type Label: Volcanic Center
Entity Type Definition Source: A volcanic center is a source of volcanic rocks. In other words, it is a location where subterranean
magma has erupted onto the surface. The locations of the
some of the volcanic centers in the
were determined on the basis of vent deposits. Other observations made in the field helped to locate volcanic centers where
there were no vent deposits. In this data set, the volcanic centers are point data displayed as red triangles with a black outline.
Entity Type Definition Source: See Mertzman et al. (2007) for a description of the vent deposits.
Attribute:
Attribute Label: volcaniccenters
Attribute Definition: This attribute contains no information and was created by MapInfo Professional version 7.0 when the point data were created
with that program. Each row in this attribute column corresponds to a point that represents a volcanic center within the Brown Mountain quadrangle.
Attribute Definition Source: None
Distribution Information
Metadata Reference Information
Metadata Date: 20070921
Metadata Contact:
Contact Information:
Contact Person Primary:
Contact Person: Isaac Weaver
Contact Position: Research Assistant
Contact Address:
Address Type: mailing and physical address
Address: Isaac Weaver,
Department of
Earth and Environment,
City:
State or
Province:
Postal Code: 17604
Contact Voice Telephone: Unavailable
Contact Electronic Mail Address: iweaver@fandm.edu
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: Version 2 – 1998