Description of data base for Open-File Report 03-294

Contents


Introduction

This pamphlet serves to introduce and describe the digital files that are included in 
this publication, available for downloading at http://geopubs.wr.usgs.gov. These data 
include both a set of Arc/Info geospatial databases containing geologic information and 
Adobe Acrobat PDF and PostScript plot files containing images of the geologic map 
sheets that includes text describing the geology of the area. For those solely interested in a 
paper plot of the maps, please see the section entitled "For Those Who Don't Use Digital 
Geologic Map Databases" below.
In this digital Open-File Report, we have taken geologic data from state geologic 
maps to develop a series of digital maps. These maps are used to evaluate the parameters 
(or elements) that might be expected to influence ground-water regimes in different parts 
of the desert southwest United States. A total of fifteen elements are identified and 
plotted on seperate maps that can be combined (computer or manually) to show which 
elements are present in different parts of the region. Some areas may contain all fifteen 
elements, other areas many contain any number of combinations of the elements. The 
elements present a first approximation of what should be the expected hydrogeologic 
setting of a sub-area within the desert southwest. In addition to the element maps, five 
paleo-tectonic maps at varying time intervals in the Cenozoic are presented. These paleo-
tectonic maps indicate where and when different physiographic landscapes existed from 
55 Ma to present.


For those who don't use digital geologic map databases

For those interested in the digital geologic maps, but do not use an Arc/Info 
compatible Geographic Information System (GIS), we have provided two plotfile 
packages containing images of the database information. Each package contains a set of 
images of the 22 individual maps in this database. One package contains the images in 
Encapsulated PostScript format (EPS) and the other package contains images in Adobe 
Acrobat Portable Document format (PDF) (see sections "EPS plot files" and "PDF plot 
files" below).
Those interested who have computer capability can access the plot packages in one of 
two ways described below (see section "Obtaining the digital database and plotfile 
packages"). Please note that the plot file packages do require PC DOS/Windows zip 
utilities to access the plot files. Therefore additional software, available free on the 
Internet, may be required to use the plot files (see section "Zip files"). In addition, the 
map and explanation sheets are large, and require large-format color plotters to produce a 
plot of the entire image, although smaller plotters can be used to plot portions of the 
images using the PDF plot files (see sections "EPS plot files" and "PDF plot files" 
below).
Those without computer capability can obtain plots of the map files through USGS 
Map-On-Demand service for digital geologic maps (see section "Obtaining digital plots 
from USGS") or from an outside vendor (see section "Obtaining plots from an outside 
vendor").
Also, USGS has adopted version numbers for publications, similar to that used in the 
computer industry. Therefore, this publication may be revised and upgraded from time to 
time. See the section "Revisions and version numbers" for details on this policy.


OF03-294 digital contents

This publication includes three digital packages. The first is the EPS Plotfile Package, 
which consists of Encapsulated PostScript plot files of all 22 maps in this publication. 
The second is the PDF Plotfile Package, and contains the same plotfiles as the first 
package, but in Portable Document Format. The third is the Digital Database Package, 
and contains the geologic database itself, a Microsoft Excel spreadsheet of Table 1 and 
Federal Geographic Data Committee (FGDC) compliant metadata.


EPS plotfile package

This package contains the images described here in Encapsulated PostScript format (see 
below for more information on PostScript plot files):

indexsheet.eps	A EPS plottable file containing an image of the entire study area
		that includes all or parts of the states of Oregon, Idaho, California,
		Nevada, Utah, Arizona, New Mexico and Colorado.

sheet1.eps	A EPS plottable file containing an image of the hydrogeologic
		map of the southwestern United States.

sheet2.eps	A EPS plottable file containing an image of the unconsolidated
		alluvial deposits in the desert southwest United States.

sheet3.eps	A EPS plottable file containing an image of the older coarse-
		grained subsurface basin fill deposits in the desert southwest
		United States.

sheet4.eps	A EPS plottable file containing an image of the older fine-
		grained subsurface basin fill deposits in the desert southwest United
		States.

sheet5.eps	A EPS plottable file containing an image of the inferred
		distribution (surface and subsurface) of Cenozoic basaltic rocks.

sheet6.eps	A EPS plottable file containing an image of the inferred
		distribution (surface and subsurface) of Cenozoic non-basaltic volcanic
		rocks.

sheet7.eps	A EPS plottable file containing an image of the inferred
		distribution of crystalline rocks at depths of less than several
		kilometers.

sheet8.eps	A EPS plottable file containing an image of the areas in which
		pre-Cenozoic coarse to fine-grained siliceous rocks of variable
		thickness in the surface and subsurface can be expected.

sheet9.eps	A EPS plottable file containing an image of the areas in
		which pre-Cenozoic fine-grained siliceous rocks of variable
		thickness in the surface and subsurface can be expected.

sheet10.eps	A EPS plottable file containing an image of the areas in
		which Cenozoic and older carbonate rocks of variable thickness
		in the surface and subsurface can be expected.

sheet11.eps	A EPS plottable file containing an image of the areas with
		regional scale alteration related to mineral deposits in the desert
		southwest United States.

sheet12.eps	A EPS plottable file containing an image of the deep basins
		containing alluvium and low density rocks in the desert southwest
		United States.

sheet13.eps	A EPS plottable file containing an image of the symmetry
		of basins in the desert southwest United States.

sheet14.eps	A EPS plottable file containing an image of the Cenozoic
		collapse calderas in the desert southwest United States.

sheet15.eps	A EPS plottable file containing an image of the domains
		of regional tilt of Cenozoic strata in the desert southwest
		United States.

sheet16.eps	A EPS plottable file containing an image of the density of
		Quaternary faults in the desert southwest United States.

sheet17.eps	A EPS plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the early
		part of Paleogene time, 38-55 Ma.

sheet18.eps	A EPS plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the latter
		part of Paleogene time, 22-38 Ma.

sheet19.eps	A EPS plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the early
		part of Neogene time, 17-22 Ma.

sheet20.eps	A EPS plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the latter
		part of Neogene time, 8-17 Ma.

sheet21.eps	A EPS plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States, 0-8 Ma.


PDF plotfile package

This package contains the images described here in PDF format (see below for more 
information on PDF plot files):

indexsheet.pdf	A PDF plottable file containing an image of the entire study area
		that includes all or parts of the states of Oregon, Idaho, California,
		Nevada, Utah, Arizona, New Mexico and Colorado.

sheet1.pdf	A PDF plottable file containing an image of the hydrogeologic
		map of the southwestern United States.

sheet2.pdf	A PDF plottable file containing an image of the unconsolidated
		alluvial deposits in the desert southwest United States.

sheet3.pdf	A PDF plottable file containing an image of the older coarse-
		grained subsurface basin fill deposits in the desert southwest
		United States.

sheet4.pdf	A PDF plottable file containing an image of the older fine-
		grained subsurface basin fill deposits in the desert southwest
		United States.

sheet5.pdf	A PDF plottable file containing an image of the inferred
		distribution (surface and subsurface) of Cenozoic basaltic rocks.

sheet6.pdf	A PDF plottable file containing an image of the inferred
		distribution (surface and subsurface) of Cenozoic non-basaltic
		volcanic rocks.

sheet7.pdf	A PDF plottable file containing an image of the inferred
		distribution of crystalline rocks at depths of less than several
		kilometers.

sheet8.pdf	A PDF plottable file containing an image of the areas in which
		pre-Cenozoic coarse to fine-grained siliceous rocks of variable
		thickness in the surface and subsurface can be expected.

sheet9.pdf	A PDF plottable file containing an image of the areas in
		which pre-Cenozoic fine-grained siliceous rocks of variable
		thickness in the surface and subsurface can be expected.

sheet10.pdf	A PDF plottable file containing an image of the areas in
		which Cenozoic and older carbonate rocks of variable thickness
		in the surface and subsurface can be expected.

sheet11.pdf	A PDF plottable file containing an image of the areas with
		regional scale alteration related to mineral deposits in the desert
		southwest United States.

sheet12.pdf	A PDF plottable file containing an image of the deep basins
		containing alluvium and low density rocks in the desert southwest
		United States.

sheet13.pdf	A PDF plottable file containing an image of the symmetry
		of basins in the desert southwest United States.

sheet14.pdf	A PDF plottable file containing an image of the Cenozoic
		collapse calderas in the desert southwest United States.

sheet15.pdf	A PDF plottable file containing an image of the domains
		of regional tilt of Cenozoic strata in the desert southwest
		United States.

sheet16.pdf	A PDF plottable file containing an image of the density of
		Quaternary faults in the desert southwest United States.

sheet17.pdf	A PDF plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the early
		part of Paleogene time, 38-55 Ma.

sheet18.pdf	A PDF plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the latter
		part of Paleogene time, 22-38 Ma.

sheet19.pdf	A PDF plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the early
		part of Neogene time, 17-22 Ma.

sheet20.pdf	A PDF plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States for the latter
		part of Neogene time, 8-17 Ma.

sheet21.pdf	A PDF plottable file containing an image of the interpretative
		paleo-tectonic map of the southwest United States, 0-8 Ma.


Digital database package

This database package contains the geologic map database files for all 22 maps in this 
Open-File Report. The digital maps, or coverages, along with their associated INFO 
directory have been converted to uncompressed Arc/Info export files. Arc export files 
promote ease of data handling, and are usable by some Geographic Information Systems 
in addition to Arc/Info (see below for discussion of working with export files). Two of 
the digital maps contain Arc/Info shapefiles, which are not Arc/Info coverages, but 
behave similar to coverages. These files are stand-alone file types that can be exported 
from and imported into Arc/Info (see below for discussion of working with shapefiles). 
The Arc export files and the associated Arc/Info coverages, shapefiles and directories, as 
well as the additional digital material included in the database, are described below:


ARC/INFO
export file		coverage		Resultant	Description of Coverage
-------------		-----------		-----------------------------

studyarea1.e00	studyarea1/	The study area in the desert southwest United
				States. This coverage includes arcs and polygons.

swlithologyc.e00	swlithologyc/	The hydrogeologic units derived from the
				geologic units of digital state geologic maps.
				This coverage includes arcs and polygons.

unconsol1c.e00	unconsol1c/	The unconsolidated alluvial deposits in the desert
				southwest United States. This coverage includes
				arcs and polygons.

lowbfsdscgl1c.e00	lowbfsdscgl1c/	The older coarse-grained subsurface basin
				fill deposits in the desert southwest United
				States. This coverage includes arcs and polygons.

lowbfmudss1c.e00	lowbfmudss1c/	The older fine-grained subsurface basin fill
				deposits in the desert southwest United States.
				This coverage includes arcs and polygons.

qczbasalt1c.e00	qczbasalt1c/	The inferred distribution (surface and subsurface)
				of Cenozoic basaltic rocks in the desert
				southwest United States. This coverage includes
				arcs and polygons.

otherczvolc1c.e00	otherczvolc1c/	The inferred distribution (surface and subsurface)
				of Cenozoic non-basaltic volcanic rocks in the							desert southwest United States. This coverage							includes arcs and polygons.

preczcrystl1c.e00	preczcrystl1c/	The inferred distribution of crystalline rocks at
				depths of less than several kilometers. This
				coverage includes arcs and polygons.

preczsdscgl1c.e00	preczsdscgl1c/	The areas in which pre-Cenozoic coarse to
				fine-grained siliceous rocks of variable thickness
				in the surface and subsurface can be expected.
				This coverage includes arcs and polygons.

preczchshss1c.e00	preczchshss1c/	The areas in which pre-Cenozoic fine-grained
				siliceous rocks of variable thickness in the
				surface and subsurface can be expected. This
				coverage includes arcs and polygons.

preczcarb1c.e00	preczcarb1c/	The areas in which Cenozoic and older carbonate
				rocks of variable thickness in the surface and
				subsurface can be expected. This coverage
				includes arcs and polygons.

mindeposits.e00	mindeposits/	The areas with regional scale alteration related to
				mineral deposits in the desert southwest United
				States. This coverage includes arcs and polygons.

calderasc.e00	calderasc/		The Cenozoic collapse calderas in the desert
				southwest United States. This coverage contains
				arcs.

basinaxes.e00	basinaxes/	The asymmetry of basins in the desert southwest
				United States. This coverage contains arcs.

stewtiltc.e00	stewtiltc/		The domains of regional tilt direction of
				Cenozoic strata in the desert southwest United
				States. This coverage includes arcs and polygons.

calk3855ma.e00	calk3855ma/	The areas of calc-alkaline volcanic rocks in the
				southwest United States for the early part of
				Paleogene time, 38-55 Ma. This coverage
				includes arcs and polygons.

calk2238ma.e00	calk2238ma/	The areas of calc-alkaline volcanic rocks in the
				southwest United States for the latter part of
				Paleogene time, 22-38 Ma. This coverage
				includes arcs and polygons.

calk1722ma.e00	calk1722ma/	The areas of calc-alkaline volcanic rocks in the
				southwest United States for the early part of
				Neogene time, 17-22 Ma. This coverage includes
				arcs and polygons.

calk17ssmalw.e00	calk17ssmalw/	The areas of fault-bounded basins in the
				southwest United States for the early part of
				Neogene time, 17-22 Ma. This coverage includes
				arcs and polygons.

basalt817ma.e00	basalt817ma/	The areas of basaltic rocks and the Cascade
				volcanic arc in the southwest United States for
				the latter part of Neogene time, 8-17 Ma. This
				coverage includes arcs and polygons.

basalt817malw.e00	basalt817malw/	The area of fault-bounded basins and the Rio
				Grande Rift in the southwest United States for
				the latter part of Neogene time, 8-17 Ma. This
				coverage includes arcs and polygons.

basalt08ma.e00	basalt08ma/	The areas of basaltic rocks and the Cascade
				volcanic arc in the southwest United States,
				0-8 Ma. This coverage includes arcs and
				polygons.

basalt08malw.e00	basalt08malw/	The areas of fault-bounded basins, aggraded
				plains, alluvial basins and the Rio Grande Rift
				in the southwest United States, 0-8 Ma. This 
				coverage includes arcs and polygons.

ARC/INFO	Associated
shapefile		Arc/Info files	Description of Coverage
-------------		-----------------	-----------------------------
basincont1k.shp	basincont1k.shx	The contour lines of basin depth at 1
		basincont1k.sbn	kilometer intervals for the desert southwest
		basincont1k.sbx	United States. This file has other associated
		basincont1k.dbf	Arc/Info files necessary to convert from a
		basincont1k.prj	shapefile to an Arc coverage.

nmcont1k.shp	nmcont1k.shx	The contour lines of basin depth at 1
		nmcont1k.sbn	kilometer intervals for New Mexico. This
		nmcont1k.sbx	file has other associated Arc/Info files
		nmcont1k.dbf	necessary to convert from a shapefile to an
		nmcont1k.prj	Arc coverage.

qfdensity005.shp	qfdensity005.shx	The contour lines of Quaternary fault
		qfdensity005.sbn	density at 0.005 km/km2 intervals for the
		qfdensity005.sbx	desert southwest United States. This file has
		qfdensity005.dbf	other associated Arc/Info files necessary to
		qfdensity005.prj	convert from a shapefile to an Arc coverage.
		

The database also includes the following Arc coverages and files:

ARC/INFO	Resultant	Description of Coverage
export file	coverage
-------------	-----------	-----------------------------

latlonlines.e00	latlonlines/	Latitude and longitude lines at 4 degree intervals
				for all 22 digital maps. This coverage contains lines.

latlontics.e00	latlontics/		Cross-hair tic marks between latitude and
				longitude lines for all 22 digital maps. This
				coverage contains lines.

states_alb.e00	states_alb/	State boundaries for all 50 states and includes the
				U.S. Virgin Islands. This coverage includes lines
				and polygons.


PDF files, ASCII text files, Microsoft Excel spreadsheet file, and ASCII text files of 
Federal Geographic Data Committee (FGDC) compliant metadata files:

of03-294.pdf		A PDF file of a pamphlet describing the digital and scientific
			results of this publication, OF03-294.

readme.txt			ASCII text file of a pamphlet describing the digital database
			contents of this publication, OF03-294 (this file).

table1.xls			A Microsoft Excel spreadsheet file of Table 1 in this
			publication, OF03-294.

studyarea1.met		A text-only file of publication level FGDC compliant metadata
			for the study area in the desert southwest United States.

swlithologyc.met		A text-only file of publication level FGDC compliant metadata
			for the hydrogeologic units derived from the geologic units of 
			digital state geologic maps.

unconsol1c.met		A text-only file of publication level FGDC compliant metadata
			for the unconsolidated alluvial deposits in the desert southwest
			United States.

lowbfsdscgl1c.met		A text-only file of publication level FGDC compliant metadata
			for the older coarse-grained subsurface basin fill deposits in
			the desert southwest United States.

lowbfmudss1c.met		A text-only file of publication level FGDC compliant metadata
			for the older fine-grained subsurface basin fill deposits in the
			desert southwest United States

qczbasalt1c.met		A text-only file of publication level FGDC compliant metadata
			for the inferred distribution (surface and subsurface) of
			Cenozoic basaltic rocks in the desert southwest United States.

otherczvolc1c.met		A text-only file of publication level FGDC compliant metadata
			for the inferred distribution (surface and subsurface) of
			Cenozoic non-basaltic volcanic rocks in the desert southwest
			United States.

preczcrystl1c.met		A text-only file of publication level FGDC compliant metadata
			for the inferred distribution of crystalline rocks at depths of
			less than several kilometers.

preczsdscgl1c.met		A text-only file of publication level FGDC compliant metadata
			for the areas in which pre-Cenozoic coarse to fine-grained
			siliceous rocks of variable thickness in the surface and
			subsurface can be expected.

preczchshss1c.met		A text-only file of publication level FGDC compliant metadata
			for the areas in which pre-Cenozoic fine-grained siliceous
			rocks of variable thickness in the surface and subsurface
			can be expected.

preczcarb1c.met		A text-only file of publication level FGDC compliant metadata
			for the areas in which Cenozoic and older carbonate rocks of
			variable thickness in the surface and subsurface can be
			expected.

mindeposits.met		A text-only file of publication level FGDC compliant metadata
			for the areas with regional scale alteration related to mineral
			deposits in the desert southwest United States.

calderasc.met		A text-only file of publication level FGDC compliant metadata
			for the Cenozoic collapse calderas in the desert southwest
			United States.

basinaxes.met		A text-only file of publication level FGDC compliant metadata
			for the symmetry of basins in the desert southwest United
			States.

stewtiltc.met		A text-only file of publication level FGDC compliant metadata
			for the domains of regional tilt of Cenozoic strata in the desert
			southwest United States.

calk3855ma.met		A text-only file of publication level FGDC compliant metadata
			for the areas of calc-alkaline volcanic rocks in the southwest
			United States for the early part of Paleogene time, 38-55 Ma.

calk2238ma.met		A text-only file of publication level FGDC compliant metadata
			for the areas of calc-alkaline volcanic rocks in the southwest
			United States for the latter part of Paleogene time, 22-38 Ma.

calk1722ma.met		A text-only file of publication level FGDC compliant metadata
			for the areas of calc-alkaline volcanic rocks in the southwest
			United States for the early part of Neogene time, 17-22 Ma.

calk17ssmalw.met		A text-only file of publication level FGDC compliant metadata
			for the areas of fault-bounded basins in the southwest United
			States for the early part of Neogene time, 17-22 Ma.

basalt817ma.met		A text-only file of publication level FGDC compliant metadata
			for the areas of basaltic rocks and the Cascade volcanic arc in
			the southwest United States for the latter part of Neogene 
			time, 8-17 Ma.

basalt817malw.met		A text-only file of publication level FGDC compliant metadata
			for the area of fault-bounded basins and the Rio Grande Rift in
			the southwest United States for the latter part of Neogene
			time, 8-17 Ma.

basalt08ma.met		A text-only file of publication level FGDC compliant metadata
			for the areas of basaltic rocks and the Cascade volcanic arc in
			the southwest United States, 0-8 Ma.

basalt08malw.met		A text-only file of publication level FGDC compliant metadata
			for the areas of fault-bounded basins, aggraded plains, alluvial
			basins and the Rio Grande Rift in the southwest United States,
			0-8 Ma.

basincont1k.met		A text-only file of publication level FGDC compliant metadata
			for the contour lines of basin depth at 1 kilometer intervals for
			the desert southwest United States.

nmcont1k.met		A text-only file of publication level FGDC compliant metadata
			for the contour lines of basin depth at 1 kilometer intervals for
			New Mexico.

qfdensity005.met		A text-only file of publication level FGDC compliant metadata
			for the contour lines of Quaternary fault density at 0.005
			km/km2 intervals for the desert southwest United States.


The following supporting directory is not included in the database package, but is 
produced in the process of reconverting the export files into Arc coverages:

info/			INFO directory containing files supporting the databases.


Zip files

The three data packages described above are stored in zip (DOS/Windows 
compression format) files. A zip utility is required to extract the data from the zip file. 
This utility is included in most PC systems, and can be obtained for a variety of platforms 
free of charge over the Internet from Internet Literacy's Common Internet File Formats 
Webpage:

http://www.matisse.net/files/formats.html

The zip file itself is slightly compressed and when the archived files are extracted the zip 
file is automatically uncompressed. Winzip for PC Windows and Zip It for Macintosh 
computers, are both decompression utilities available free of charge at the following 
websites:

(http://www.awa.com/softlock/zipit/zipit.html) - Zip It file decompression for Macintosh
(ftp://ftp.cdrom.com/pub/cica/win3/util/) - WinZip file decompression for PC Windows

When the zip file is uncompressed and the data from the zip file is extracted, the files can 
be put in a directory of the user's choice. The specifics of the zip files are listed below:

Name of		Size of		Data package
compressed	compressed	contained
zip file		zip file
		(uncompressed)
--------------	-------------------	------------------

of03-294ps.zip	20 MB (260 MB)	EPS plotfile package
of03-294pdf.zip	12 MB (13 MB)	PDF plotfile package
of03-294db.zip	27 MB (108 MB)	Digital database package


EPS plot files

For those interested in the geologic data for this publication, but don't use an Arc/Info 
compatible GIS system we have included a separate data package with 22 PostScript plot 
files. Of the 22 files, the first 15 files after the index file (index.eps) and the sheet1 file 
(sheet1.eps) are related to the 15 element maps described earlier in this pamphlet (see 
Introduction section above). These 15 map files can be divided into five groups related to 
geologic parameters. [1] unconsolidated younger sediments and sedimentary rocks, 
mostly of Cenozoic age (Sheet 2, Sheet 3, Sheet 4, sheet2.eps, sheet3.eps, sheet4.eps); [2] 
lithified material including basaltic rocks of Cenozoic age (Sheet 5, sheet5.eps), other 
types of volcanic rocks of Cenozoic age (Sheet 6, sheet6.eps), crystalline rocks including 
granitoids, gneisses and schists of any age but mostly older than Cenozoic (Sheet 7, 
sheet7.eps), siliceous and carbonate rocks mostly of pre-Cenozoic age (Sheet 8, Sheet 9, 
Sheet 10, sheet8.eps, sheet9.eps, sheet10.eps); [3] regional alteration (Sheet 11, 
sheet11.eps); [4] basins with a variety of unlithified and lithified fill (Sheet 12, Sheet 13, 
sheet12.eps, sheet13.eps); [5] tectonic-structural features (Sheet 14, Sheet 15, Sheet 16, 
sheet14.eps, sheet15.eps, sheet16.eps).
The last five map files are related to the paleo-tectonic maps as described earlier in 
this pamphlet (see Introduction section above). These 6 map files correspond to Sheets 
17-21 in this publication (sheet17.eps, sheet18.eps, sheet19.eps, sheet20.eps, 
sheet21.eps). These interpretative maps show the most recent geologic history of the 
southwestern U.S. at varying time intervals in the Cenozoic.
The PostScript image for all 22 digital maps (index.eps, sheet1.eps to sheet21.eps) are 
at 1:2,000,000 scale and set for 34 inches wide by 44 inches high plot size, so it requires a 
large plotter to produce paper copies at the intended scale. Therefore, the paper must be at 
least 36 inches wide to correctly output these hardcopy maps.
The PostScript plotfiles were produced in ArcMap (part of ArcGIS, Arc/Info version 
8.2) by printing the finished maps to a Encapsulated PostScript file.


PDF plot files

A second plot package contains PDF versions of the 22 EPS map sheets. Adobe 
Acrobat PDF (Portable Document Format) files are similar to EPS plot files in that they 
contain all the information needed to produce a paper copy of a map or pamphlet and they 
are platform independent. Their principle advantage is that they require less memory to 
store and are therefore quicker to download from the Internet. In addition, PDF files allow 
for relatively easy printing of portions of a map image on a printer smaller than that 
required to print the entire map without the purchase of expensive additional software. 
All PDF files in this report have been created from EPS plot files using Adobe Acrobat 
Distiller. In test plots we have found that paper maps created with PDF files contain 
almost all the detail of the maps created with PostScript plot files. We would, however, 
recommend that those users with the capability to print the large PostScript plot files to 
do so in preference to the PDF files.
To use the PDF files, the user must download and install a copy of Adobe Acrobat 
Reader. This software is available free of charge from the Adobe website 
(http://www.adobe.com). Please follow the instructions given at the website for 
installation. Once installed, the Acrobat Reader software contains an on-line manual and 
tutorial.
There are two ways to use Acrobat Reader in conjunction with the Internet. One is to 
use the PDF reader plug-in with your Internet browser. This allows for interactive 
viewing of PDF file images within your browser. This is a very handy way to quickly 
look at PDF files without downloading them to your hard disk. The second way is to 
download the PDF file to your local hard disk, and then view the file with Acrobat 
Reader. We strongly recommend that large map images be handled by downloading to 
your hard disk, because viewing them within an Internet browser tends to be very slow.
To print a smaller portion of a PDF map image using Acrobat Reader, it is necessary 
to cut out the portion desired using Acrobat Reader and the standard cut and paste tools 
for your platform, and then to paste the portion of the image into a file generated by 
another software program that can handle images. Most word processors (such as 
Microsoft Word) will suffice. The new file can then be printed. Image conversion in the 
cut and paste process, as well as changes in the scale of the map image, may result in loss 
of image quality. Test plots of a converted image, however, have proven adequate in most 
cases. Software designed to handle images (Photoshop, Illustrator) do a better job.


Obtaining the Digital Database and Plotfile Packages

The digital data can be obtained in either of two ways:

1. From the USGS Western Region Publications Group Webpage
2. Request for a CD-ROM disk (limited quantities available)

To obtain the Plotfile or Digital Database packages from the 
USGS website:

The U.S. Geological Survey supports a set of graphical pages on the World Wide Web. 
Digital publications (including this one) can be accessed via these pages. The location of 
the main Web page for the entire USGS is

	http://www.usgs.gov

The web server for digital publications from the Western Region is

	http://geopubs.wr.usgs.gov

or goto

	http://geopubs.wr.usgs.gov/open-file/of03-294

to access this publication. Besides providing easy access to the entire digital database, this 
Web page also affords easy access to the PostScript and PDF plot files for those who do 
not use digital databases (see below).


To obtain the Plotfile or Digital Database packages on a CD-ROM disk:

The two Plotfile packages and Digital Database package can be obtained by sending a 
request (postal or electronic mail) with return address to:

	Geologic Database of the Desert southwest United States
	U.S. Geological Survey
	345 Middlefield Road, MS 975
	Menlo Park, CA 94025
	Attn: Edwin H. McKee

Do not omit any part of this address! Please send e-mail requests to: mckee@usgs.gov

NOTE: Individual files cannot be sent on CD-ROM. Please access these files via the 
USGS website listed above.


Obtaining plots from a commercial vendor

Those interested in the geologic data of the desert southwest United States, but do not 
use a computer or the Internet, can still obtain the information. We will provide the 
PostScript or PDF plot files on a CD-ROM dismapping, or other improvements, will be 
integrated into this publication. Rather than releasing an entirely new publication, the 
USGS has adopted a policy of using version numbers similar to that used in the computer 
industry. The original version of all publications will be labeled Version 1.0. Subsequent 
small revisions will be denoted by the increase of the numeral after the decimal, while 
large changes will be denoted by increasing the numeral before the decimal. Pamphlets 
and map products will be clearly marked with the appropriate version number. 
Information about the changes, if any, that have been made since the release of Version 
1.0 will be listed in the publication revision file. This file will be available at the 
publication web site (see above), and will also be included in the digital database 
package. A simplified version of the revision list will be included in the publication 
metadata.


Digital database format

The databases in this publication were compiled in Arc/Info, a commercial 
Geographic Information System produced by Environmental Systems Research Institute, 
Redlands, California (ESRI), with version 3.1 of the menu interface ALACARTE 
(Fitzgibbon and Wentworth, 1991; Fitzgibbon, 1991; Wentworth and Fitzgibbon, 1991) 
and ArcGIS Version 8.2 for the PC Windows operating system. The files are in 
COVERAGE (Arc/Info vector data) format or Shapefile (Arc/Info vector data) format. 
Coverages are stored in uncompressed Arc export format (Arc/Info version 7.x). Arc 
export files (.e00 extension) can be converted into Arc coverages in Arc/Info (see below) 
and can be read by some other Geographic Information Systems, such as MapInfo via 
ArcLink and ESRI's ArcView (free limited version for PC Windows from ESRI's 
website: http://www.esri.com). Arc shapefiles (.shp extension) come with 5 other files 
with the same filename, but diferent extensions (.shx, .sbn, .sbx, .dbf, .prj). The principle 
shapefile (with .shp extension) can be used much like a coverage in Arc/Info, but one 
must remember the file is not a coverage nor is it part of any coverage. These files do not 
contain any topological information such as that found in Arc coverages. Shapefiles, 
however, can be converted into a coverage in ArcGIS, using the ArcToolBox interface.
The digital compilation was done in two operating system environments. In the UNIX 
environment, Arc/Info version 7.2.1 with version 3.1 of the menu interface ALACARTE 
(Fitzgibbon and Wentworth, 1991; Fitzgibbon, 1991; Wentworth and Fitzgibbon, 1991) 
was used. In the PC Windows environment, ArcGIS version 8.2 along with the full 
workstation suite of tools such as GRID, TIN, etc was used.


Converting Arc export files

Arc export files are converted to Arc coverages using the Arc command IMPORT 
with the option COVER. Arc export files can also be read by some other Geographic 
Information Systems. Please consult your GIS documentation to see if you can use Arc 
export files and the proceedure to import them.


Digital compilation

The geologic data was collected and developed from a variety of sources: digital GIS 
datasets available at USGS or other spatial database-related websites, digital files 
acquired from scientists within the USGS, and digitizing of mapped features on mylar or 
paper maps. Details of the original digital GIS datasets or other digital files can be found 
in the various FGDC compliant metadata included in the Digital Database package. The 
digitized maps were done on a CalComp digitizing table and then transformed from 
digitizing cooridnates to projection coordinates with digital tics placed by hand at known 
locations on the earth, such as the intersection of latitude and longitude coordinates.


Spatial resolution

Use of this digital geologic data should not violate the spatial resolution of the data. 
Although the digital form of the data removes the constraint imposed by the scale of a 
paper map, the detail and accuracy inherent in map scale are also present in the digital 
data. This dataset was edited at a scale of 1:2,000,000 and although higher resolution 
information was used in the interpretation of some of the maps, the intended use for these 
maps is at the 1:2,000,000 regional scale. Plotting at scale larger than 1:2,000,000 will 
not yield greater detail, although it may reveal fine-scale irregularities below the intended 
resolution of the database. Similarly, where this database is used in combination with 
other data of higher resolution, the resolution of the combined output will be limited by 
the lowest resolution of these data.


Database specifics

What follows is a brief and simple description of the databases included in this report 
and the data in them. For a comprehensive look at the database structure and content, 
please see the FGDC metadata files (.met extension), included in the database package 
and available separately at the publication web page.
The map databases consist of Arc coverages, shapefiles and supporting INFO files, 
which are stored in a Albers (Albers Conical Equal Area) projection (Table 1).

Table 1. Map Projection

PROJECTION ALBERS
UNITS METERS
DATUM NAD27 (North American Horizontal Datum of 1927)
SPHEROID CLARKE1866 (Arc/Info default)
PARAMETERS
1st standard parallel 29 30 00
2nd standard parallel 45 30 00
central meridian -96 0 0
latitude of projection's origin 23 0 0
false easting (meters) 0
flase northing (meters) 0

The content of the geologic database can be described in terms of the lines and areas that 
compose the map. Descriptions of the database fields use the terms explained in Table 2.

Table 2. Field Definition Terms

ITEM NAME	name of the database field (item)
WIDTH		maximum number of digits or characters stored
OUTPUT		output width
TYPE		B-binary integer, F-binary floating point integer, I-ASCII integer,
		C-ASCII character string, N-number with decimal places
N. DEC.		number of decimal places maintained for floating point numbers

Lines

The lines (arcs) are recorded as strings of vectors and are described in the arc attribute 
table (an example of the format of arc attribute tables is shown in Table 3). They define 
the boundaries of the mapped features and the map boundaries. The first seven items in 
the "item name" column of any line coverage in Arc/Info are defined by the GIS software. 
Any items after the first seven are usually user-defined attribute items for particular lines 
or all lines in the coverage. These items are typically explained in the FGDC metadata 
files associated with each coverage and will not be described here.

Table 3. Example content of an Arc Attribute Table

ITEM NAME	WIDTH	  OUTPUT	TYPE	N. DEC

FNODE#		4	5		  B		arc starting node (from node)
TNODE#		4	5		  B		arc ending node (to node)
LPOLY#		4	5		  B		polygon to the left of the arc
RPOLY#		4	5		  B		polygon to the right of the arc
LENGTH		4	12		  F	3	length of arc in meters
<coverage>#	4	5		  B		unique internal control number
<coverage>-ID	4	5		  B		unique identification number

Areas

The areas (polygons) are regions enclosed by lines and are described in the polygon 
attribute table (an example of the format of polygon attribute tables is shown in Table 4). 
Arc/Info coverages cannot contain both point and polygon information, so only coverages 
with polygon information will have a polygon attribute table, and these coverages will not 
have a point attribute table. The first four items in the "item name" column of any 
polygon coverage in Arc/Info are defined by the GIS software. Any items after the first 
four are usually user-defined attribute items for particular polygons or all polygons in the 
coverage. These items are typically explained in the FGDC metadata files associated with 
each coverage and will not be described here.

Table 4. Example content of a Polygon Attribute Table

ITEM NAME	WIDTH	  OUTPUT	TYPE	N. DEC

AREA		4	12		  F	3	area of polygon in sq. meters
PERIMETER	4	12		  F	3	length of perimeter in meters
<coverage>#	4	5		  B		unique internal control number
<coverage>-ID	4	5		  B		unique identification number


Acknowledgments

The authors are grateful to the following USGS scientists (current and emeritus) for 
their input in developing the maps and scientific content for this publication: R.C. 
Jachens, D. Sweetkind, F.A. D'Agnese, J.M. Harrill, J.R. Bartolino. In particular, the 
authors are grateful to R.C. Jachens for providing the raster data of gravity-derived depth 
to Cenozoic basement in the southwest United States. This dataset was instrumental in 
terms of understanding basin geometry and shape that are portrayed in the maps of this 
publication.
The first author would like to acknowledge A.D. Konieczki and J.A. Rees of the 
USGS Water Resources Division in Tucson, AZ for their help in gathering and providing 
digital datasets in the early stages of this publication. Thanks also to D. Bedford (USGS) 
for providing the digital state geologic map units of California, Nevada, and Utah and to 
V.E. Langenheim (USGS) for providing the digital Quaternary fault datasets used to 
make map sheet 16.
The first author would also like to thank M. Diggles, R. Graymer and D. Bedford of 
USGS-Menlo Park, CA for their advice on metadata development and presentation. 


References Cited

Fitzgibbon, T.T., 1991, ALACARTE installation and system manual (version 1.0): U.S. 
Geological Survey Open-File Report 91-587-B.

Fitzgibbon, T.T., and Wentworth, C.M., 1991, ALACARTE user-interface:  AML code 
and demonstration maps (version 1.0): U.S. Geological Survey Open-File Report 91-
587-A.

Wentworth, C.M., and Fitzgibbon, T.T., 1991, ALACARTE user manual (version 1.0): 
U.S. Geological Survey Open-File Report 91-587-C.


References Cited in FGDC-compliant Metadata files

Anderson, O.J., and Jones, G.E., 1997, The digital geologic map of New Mexico: New 
Mexico Bureau of Mines and Geology Open-File Report 97-52, Scale 1:500000.

Black, B.D., Hecker, S., Hylland, M.D., Christenson, G.E., and McDonald, G.N., 2003, 
Quaternary fault and fold database and map of Utah: Utah Geological Survey Open-
File Report 98-521, Scale 1:500000.

Dohrenwend, J.C., Schell, B.A., Menges, C.M., Moring, B.C., and McKittrick, M.A., 
1996, Reconnaisance photogeologic map of young (Quaternary and late-Tertiary) faults 
in Nevada: Nevada Bureau of Mines and Geology Open-File Report 96-2, p. 9-1 to 9-
12.

Fenneman, N.M., 1931, Physiography of western United States: McGraw-Hill, New 
York, 534 pp.

Fenneman, N.M., 1946, Physical divisions of the United States: U.S. Geological Survey, 
Scale 1:7000000.

Green, G.N., 1992, The digital geologic map of Colorado: U.S. Geological Survey Open-
File Report 92-507, Scale 1:500000.

Grubensky, M.J., and Bagby, W.C., 1990, Miocene calc-alkaline magmatism, calderas, 
and crustal extension in the Kofa and Castle Dome mountains, southwestern Arizona: 
Journal of Geophysical Research, v. 95, p. 19989-20003.

Hintze, L.F., Willis, G.C., Laes, D.Y.M., Sprinkel, D.A., and Brown, K.D., 2000, Digital 
geologic map of Utah: Utah Geological Survey, 179DM (CD-ROM), Scale 1:500000.

Hirschberg, D.M., and Pitts, G.S., 2000, Digital Geologic Map of Arizona: A Digital 
Database derived from the 1983 printing of the Wilson, Moore, and Cooper 1:500,000-
scale map: Arizona Geological Survey Open-File Report 00-409, Scale 1:500000.

Jachens, R.C., and Moring, B.C., 1996, Thickness of Cenozoic deposits and the isostatic 
residual gravity over basement: Nevada Bureau of Mines and Geology Open-File 
Report 96-2, p. 2-1 to 2-10.

Jennings, C.W., 1994, Fault activity map of California and adjacent area, with locations 
and ages of recent volcanic eruptions: California Division of Mines and Geology 
Geologic Data Map no.6, Scale 1:750000.

Johnson, B.R., and Raines G.L., 1995, Digital representation of the Idaho state geologic 
map: A contribution to the Interior Columbia River Basin Ecosystem Management 
Project: U.S. Geological Survey Open-File Report 95-690, Scale 1:500000.

Long, K.R., DeYoung, J.H., and Ludington, S.D., 1998, Significant deposits of gold, 
silver, copper, lead, and zinc in the United States: U.S. Geological Survey Open-File 
Report 98-206B (diskette).

Ludington, S., Cox, D.P., Leonard, K.W., and Moring, B.C., 1996, Ceozoic volcanic 
geology of Nevada: Nevada Bureau of Mines and Geology Open-File Report 96-2, p. 5-
1 to 5-10.

Luedke, R.G., 1993, Map showing distribution, composition, and age of early and middle 
Cenozoic volcanic centers in Arizona, New Mexico, and west Texas: U.S. Geological 
Survey Misc-Invest. Map 2291-A, Scale 1:1000000.

Luedke, R.G., 1993, Map showing distribution, composition, and age of early and middle 
Cenozoic volcanic centers in Colorado and Utah: U.S. Geological Survey Misc-Invest. 
Map 2291-B, Scale 1:1000000.

Luedke, R.G., and Smith, R.L., 1981, Map showing distribution, composition, and age of 
late Cenozoic volcanic centers in California and Nevada: U.S. Geological Survey Misc-
Invest. Map 1091-C, Scale 1:1000000.

Luedke, R.G., and Smith, R.L., 1982, Map showing distribution, composition, and age of 
late Cenozoic volcanic centers in Oregon and Washington: U.S. Geological Survey 
Misc-Invest. Map 1091-D, Scale 1:1000000.

Machette, M.N., Personius, S.F., Kelson, K.I., Haller, K.M., and Dart, R.L., 1998, Map 
and database of Quaternary faults and folds in New Mexico: U.S. Geological Survey 
Open-File Report 98-521, Scale 1:750000.

McCurry, M., 1982, The geology of a late Miocene silicic volcanic center in the Woods 
and Hackberry Mountains area of the eastern Mojave Desert, San Bernadino County, 
California: Mesozoic-Cenozoic tectonic evolution of the Colorado River region, 
California, Arizona, and Nevada (Anderson-Hamilton volume), Cordilleran Publishers, 
p. 433-440.

Nakata, J.K., Wentworth, C.M., and Machette, M.N., 1982, Quaternary fault map of the 
Basin and Range and Rio Grande Rift province, western United States: U.S. Geological 
Survey Open-File Report 82-579, Scale 1:2500000.

Pearthree, P.A., 1999, Quaternary fault data and map of Arizona: Arizona Geological 
Survey Open-File Report 98-24, Scale 1:750000.

Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, 
GIS data for the geologic map of California (version 2.0): California Department of 
Mines and Geology, 2000-007 (CD-ROM), Scale 1:750000.

Stewart, J.H., Carlson, J.E., Raines, G.L., Connors, K.A., Moyer, L.A., and Miller, R.J., 
2003, Spatial database for the geologic map of Nevada: U.S. Geological Survey Open-
File Report 03-XXX, Scale 1:500000.

Stewart, J.H., and 19 additional co-authors, 1998, Map showing Cenozoic tilt domains 
and associated structural features, western North America (Plate 1): Geological Society 
of America Special Paper 323, Scale 1:5000000.

Thorson, J.P., 1971, Igneous petrology of the Oatman district, Mohave county, AZ: P. 
hD. Thesis, University of California Santa Barbara.

Walker, G.W., and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological 
Survey, Scale 1:500000.


Appendix.  Geologic units from the digital state 
geologic maps used to develop Hydrogeologic units

The following is a list of the geologic units for each state that have been categorized 
into one of nine "hydrogeologic" units. Please note that the hydrogeologic unit names 
used here are those designated for the digital Arc/Info coverage- swlithologyc. See the 
pamphlet describing the scientific content of OFR 03-294 for more details on each of the 
nine units. Each hydrogeologic unit is also shown in map form on sheets 2 through 10 in 
the digital plotfiles.

Hydrogeologic unit defined in the	Corresponding description in OFR03-294
Arc/Info digital coverage- swlithologyc	and map sheet number in the digital plotfiles
---------------------------------------		--------------------------------------------------
Uncosolidated alluvial deposits	Unconsoldated alluvial deposits (sheet 2)
Older basin fill (sandstone,conglomerate)	Older basin- fill deposits, coarse to fine-
				grained (Sheet 3)
Older basin fill (mudstone,evaporite)	Older basin- fill deposits, fine-grained (Sheet 4)
Cenozoic basalt			Cenozoic basaltic rocks (sheet 5)
Cenozoic and Mesozoic non-basaltic	Cenozoic andesite, dacite, and rhyolitic,
				volcanic rocks or Cenozoic non-basaltic rocks (Sheet 6)
Crystalline rocks (metamorphic,plutonic)	Crystalline rocks (Sheet 7)
Pre-Cenozoic rocks (sandstone,	Siliceous sedimentary rocks, coarse-grained rocks (Sheet 8)
conglomerate)
Pre-Cenozoic rocks (chert,siltstone	Siliceous sedimentary rocks, fine-grained (Sheet 9)
mudstone) or Pre-Cenozoic (chert,		
siltstone,mudstone,evaporite)
Cenozoic and Pre-Cenozoic carbonate	Carbonate rocks (Sheet 10)
rocks or Pre-Cenozoic carbonate rocks


Arizona geologic map units		Hydrogeologic unit
(Hirschberg and Pitts, 2000)		(this publication)
---------------------------------		------------------------
Qy, Q, Qo				Unconsolidated alluvial deposits
Tsy, Tsm, Tsv, Tss, Tso		Older basin fill (sandstone,conglomerate)
QTb, Tby, Tb			Cenozoic basalt
Tvy, Tv, Kv, Jv, QTv		Cenozoic and Mesozoic non-basaltic
				volcanic rocks
Kmv, Ks, KJs, Jm, Js, Jy, Trcs,		Pre-Cenozoic rocks (sandstone,
Jgc, Jsv				conglomerate)
Trc, Trm, Ys			Pre-Cenozoic rocks (chert,siltstone,
				mudstone)
Pz, P, PP, MC			Cenozoic and pre-Cenozoic carbonate rocks
Ti, Tg, TKgm, TKg, Jg, Trv, Mzo,	Crystalline rocks (metamorphic,plutonic)
MzPz, Yd, Yg, YXg, Xg, Xm, Xms,
Xmv, Xq


California geologic map units		Hydrogeologic unit
(Saucedo and others, 2000)		(this publication)
---------------------------------		------------------------
Q, Qg, Qls, Qs			Unconsolidated alluvial deposits
Tc, QPc				Older basin fill (sandstone,conglomerate)
Qrv, Qv, Qv?, Tv			Cenozoic basalt
Qrvp, Qvp, Qvp?, Tvp		Cenozoic and Mesozoic non-basaltic
				volcanic rocks
E, E-Ep, Ep, K, K?, KJf, KJfm, Ku,	Pre-Cenozoic rocks (sandstone,
Ku?, Ku-Ep, M, M?, Mc, O, Oc, P	conglomerate)
Oc?, Pm, TK, Ec
J, J?, Kl, Kl?, Tr			Pre-Cenozoic rocks (chert,siltstone,
				mudstone)
C, Ca, D, ls, Pz, SO			Cenozoic and pre-Cenozoic carbonate rocks
gb, gr, grCz, gr-m, grMz, grMz?, grpC,	Crystalline rocks (metamorphic,plutonic)
grpC?, grPz, KJfs, m, MtKJfs, mv, Mzv,
pC, pCc, Pzv, sch, Ti, um, grCz?


Colorado geologic map units		Hydrogeologic unit
NOTE: this is only a partial list		(this publication)
(Green, 1992)
---------------------------------		------------------------
Qa, Qg, Qe, Qgo, Qeo, Qd, QTa, Tgv,	Unconsolidated alluvial deposits
Qdo, Ql
QTsa, To, Ta, Twr, Th, Tcu, Tpc, Ts,	Older basin fill (sandstone,conglomerate)
Te, Tos, Tsp, Td
Qb, Tbb, Tbbi			Cenozoic basalt
Tlp, Tbr, Tbrt, Taf, Tial, Tpl, Tiql, Tmi	Cenozoic non-basaltic volcanic rocks
TKr, TKa, Kvt, Kpcl, Kpg, KJde, KJdm,	Pre-Cenozoic rocks (sandstone,
@Ps, &m, &mb, &b, Do		conglomerate)
Km, &mbe			Pre-Cenozoic rocks (chert,siltstone,
				mudstone,evaporite)
MDO, Or				Pre-Cenozoic carbonate rocks
YXg, Xg, Yg, Xq, Xfh, Xm, Xb, TKi	Crystalline rocks (metamorphic,plutonic)


Idaho geologic map units		Hydrogeologic unit
(Johnson and Raines, 1995)		(this publication)
---------------------------------		------------------------
Qa, Qpa, Qg, Qpg, Qpug, Qpmg, Qplg,	Unconsolidated alluvial deposits
Qpc, Qpt, Qd, Qpd, Qw, Qrw, Qpw, Qs,
QTg, QTs, Qp?g, Qpmd
Td, Tpd, Tmd, Ted, TKg		Older basin fill (sandstone,conglomerate)
Qrb, Qpub, Qpm, QTb, Tpb, Tmb, Tm3b,	Cenozoic basalt
Tm2b, Tm1b, Qpu?b, Tm?b, Qpu1b,
Qpu2b, Qpu3b, Qpu4b, Zib
Qpuf, Qpu3f, Qpu2f, Qpu1f, Qpmf,	Cenozoic non-basaltic volcanic rocks
Qpm1f, QTf, Tpf, Tmf, Tpv, Tov, Tev,
Qplf, Qpm?f, Qpmb, Qpu?f, Qpm2f
Jw, J, J1, TR, TRv, PZu, PPc, Ps, Mc, 	Pre-Cenozoic rocks (sandstone,
SOc, Zn, Zs, Z1s, Y4n, Y, Y4s, Y3s,	conglomerate)
Y2s,Y1s,TrPv, Jwm, Y?s, Ys, Z?s, Y?nm,
PNs,PPNc, Pv
Kl, Ju, TRu, P, PPs, Dc, DSc, Cc, Cmn,	Pre-Cenozoic rocks (chert,siltstone,
Y2n, Y1n, Y4m, Y?n, Y1nm, Y2nm,	mudstone)
PPNs
Ku, TRuw, TRl, PM, M, Ms, MD, PZl, D,	Cenozoic and pre-Cenozoic carbonate rocks
DS, DO, S, SO, O, Ou, Ol, OCc, C, Cun,
Z2s, Y3n, Y3nm, PNM
Ti, Tmi, Ki, KJi, JTRi, pKi, Zi, PCi, P2,	Crystalline rocks (metamorphic,plutonic)
OC, Y, Y2m, PC, PC3, PC2, PC1, X, Km,
mig, Ki?, Kif, Kii, Kim, PCim, pKim,
PZm, Tei, OCm


Nevada geologic map units		Hydrogeologic unit
(Stewart and others, 2003)		(this publication)
---------------------------------		------------------------
Qa, Qls, Qm, QToa, Qp, Qmi		Unconsolidated alluvial deposits
Tbg, Tbr, Ts1, Ts3, Tts		Older basin fill (sandstone,conglomerate)
QTs				Older basin fill (mudstone,evaporite)
QTb, Tb, Tba, Tob			Cenozoic basalt
QTa, QTr, Ta1, Ta2, Ta3, Tr1, Tr2,	Cenozoic non-basaltic volcanic rocks
Tr3, TRk, TRPv, Trt, Tt1, Tt2, Tt3,
TRPvs
Ch, Css, CZq, Jd, JPu, JTRa, Jv, PPa,	Pre-Cenozoic rocks (sandstone,
TKs, Se				conglomerate)
Csc, Tr, CZs, DCsv, Dsl, Dt, JTRs, Ks,	Pre-Cenozoic rocks (chert,siltstone,
MDmc, MDs, Msv, Os, Osv, Ot, PMh,	mudstone)
Psc, PZsp, Ss, TRch, TRPd, Ct, JTRsv,
Ds
TRc, TRPs, PPcd, Pc, PMc, PPc, Pc,	Cenozoic and pre-Cenozoic carbonate rocks
Mc, Dc, DCc, Sc, Oc, OCc, Cc, SOc,
Pcd, Ths, TKsu, Ts2, Ml, St, TRmt
Jgb, TJgr, Tgr, MZgr, Kgr, KJd, Jgr,	Crystalline rocks (metamorphic,plutonic)
KJim, Ygr, Xm, Oct, Ti, TRgr, Tmi,
Tri, Zqs, Zw, TRlgr


New Mexico geologic map units	Hydrogeologic unit
(Anderson and Jones, 1997)		(this publication)
---------------------------------		------------------------
Qa, Ql, Qe, Qeg, Qd, Qp, ds, Qe/Qp,	Unconsolidated alluvial deposits
Qe/Qa, Qpl, Playa, Qe/Qpl	
Qoa, QTa, QTp, QTg, QTsf, QTs, Tfl,	Older basin fill (sandstone,conglomerate)
Tsf, To, Tlp, Tc, Tps, Tsj, Tn, Toa, Tpc,
TKr, TKpr, TKa, Qp/QTs, Qa/QTs,
Qa/QTsf, Qe/QTsf, Qp/QTsf, Ql/QTs,
Qe/QTs, Qba/To, Qe/Tnb, Qp/Tsf,
Qoa/To							
QTt, Tus				Older basin fill (mudstone,evaporite)
Qb, Qv, Qbo, QTbl, Tnb, Tpb, Tuau,	Cenozoic basalt
Tual, Thb, Tmb
Qr, Qvr, Qbt, Tos, Tnr, Tnv, Tv, Tlv,	Cenozoic non-basaltic volcanic rocks
Turp, Tlrp, Turf, Tlrf, Tla, TKav, Ka, Tuv
Ku, Kmc, KTv, K, Kpc, Kg, Kmg, Kpg,	Pre-Cenozoic rocks (sandstone,
Kth, Kma, Kdr, Kd, Kdg, Kl, J, Jm,	conglomerate)
Jmsu, Jz, Jze, Je, Jsr, @, Pz, &, Pqm,
Pr, Pbc, Pcc, Pbrc, Pg, Pa, Pau, Pal, Pys,
Pct, Pb, P&sc, P&, &s, &ps, M, MD, M_,
D, SO, SOC, O_, Y, Ys, Pqr, Kcc, Pay,
Kvt, &lc
Kkf, Kls, Kpn, Kmv, Kch, Klv, Kpl,	Pre-Cenozoic rocks (chert,siltstone,
Kms, Kph, Kmm, Kmr, Km, Kmu, Kml,	mudstone)
Kdm, Kgc, Kc, Kgg, Kgr, Kbm, @r, @b,
@t, @g, @s, @cu, @m, Psl, Pc, Pat, Pco,
@rp, @c
Knf, Kmf, Kgh, Pty, Pgq, Pcp, Pdm, Psa,	Cenozoic and pre-Cenozoic carbonate rocks
Psg, Pvp, Ph, &m, &me, Mk, Psr, Py
Tif, Ti, Tui, Tuim, Tli, TKi, Ki, O_p, Yi,	Crystalline rocks (metamorphic,plutonic)
Yp, YXp, X, Xms, Xm, Xp, Xmo, Xmu,
Zi


Oregon geologic map units		Hydrogeologic unit
(Walker and MacLeod, 1991)		(this publication)
---------------------------------		------------------------
Qal, Qd, Qls, Qma, Qmp, Qgs, Qf, Qg,	Unconsolidated alluvial deposits
Qgf, Qt, QTg, QTst, Ql, QTs, Qs, Qpl,
Tlf
Ts, Tmsm, Tcss, Tn, Tsfj, Tm, Tms, Ty,	Older basin fill (sandstone,conglomerate)
Tt, Tmst, Tvq, Ta, Tsd, Tco, Ttvm, Tss,
Tmss, Tmsc, Tsm, Tfc, Tfee, Tyq
QTba, Tc, Tcw, Tcg, Tpb, Ttv, Tsr, Tim,	Cenozoic basalt
Ti, Tig, Qba, QTp, QTmv, QTa, Trb, Tmv,
Tfe, Tbaa, Tub, Tfeb, QTib, Tib, Qyb, Qlb,
Qb, QTps, QTvm, QTb, Tob, Tstv, Tvm,
Tp, Tps, Tb, Tcs, Tcp, Tci, Tba, Tbas,
Tsff, Tca, Tvi, Tc?
Qa, Tsv, Tut, QTvs, Tvs, Tat, Trh, Twt,	Cenozoic non-basaltic volcanic rocks
Tts, Tr, Tsf, Tas, Tct
Kc, KJds, KJm, Tu, Tus, Tsm, Tfc, Tfcc,	Pre-Cenozoic rocks (sandstone,
Ks, Js, JTRsv, Jub, TRsv, TRs, TRv, 	conglomerate)
TrPzs, Jub, TRPv, Jv
Jop, Jss, Js, Jm, cm, cs, TRPzm, TRPzs,	Pre-Cenozoic rocks (chert,siltstone,
JTRs, mr, Psv, KJdv, Ju, TRPzu		mudstone)
TRPzsn, Pzs			Cenozoic and pre-Cenozoic carbonate rocks
bc, mc, Tia, KJg, KJgu, JTRgd, Qrd, Thi,	Crystalline rocks (metamorphic,plutonic)
TRPzsv, Pzsv, KJi, Jc, TRPzg


Utah geologic map units		Hydrogeologic unit
(Hintze and others, 2000)		(this publication)
---------------------------------		------------------------
Qa, Qe, Qg, Qls, QT, Ql, Qs, Qao,	Unconsolidated alluvial deposits
playa
T1, T2, T3, T4, T5, TK		Older basin fill (sandstone,conglomerate)
Qm				Older basin fill (mudstone,evaporite)
Qb, Tpb				Cenozoic basalt
Qr, Tma, Tmb, Tmr, Tmv, Tov, Tpr, Tvu	Cenozoic non-basaltic volcanic rocks
JTr, K1, K2, K3, P1, Jg		Pre-Cenozoic rocks (sandstone,
				conglomerate)
J1, J2, M3, Tr1, Tr2			Pre-Cenozoic rocks (chert,siltstone,
				mudstone)
C2, C3, D, M1, M2, O, P, P2, PeP, S, PP	Pre-Cenozoic carbonate rocks
Cf, Ji, PCi, PCm, PCs, Ti, C1		Crystalline rocks (metamorphic,plutonic)