Western Earth Surface Processes

U.S. Geological Survey
Data Series 225
version 1.0

Database for the east half of "Preliminary Geologic Map of the Blythe 30' by 60' quadrangle, California and Arizona" (U.S. Geological Survey Open-File Report 90-497)

By Paul Stone


photo of person on spire in middleground and river stretching off into the distance in the background

This report contains a digital geologic map database created from the east half of the previously published "Preliminary Geologic Map of the Blythe 30' by 60' Quadrangle, California and Arizona". That map was published as U.S. Geological Survey (USGS) Open-File Report 90-497 and is available from the USGS in the form of paper copies reproduced from a scale-stable film original. The scale of the previously published map is 1:100,000.

The digital database of this report is intended to contain exactly the same geologic data as the east half of the published map in USGS Open-File Report 90-497. No data have been intentionally added, subtracted, or modified from the original map. The database has been carefully prepared and reviewed to ensure that it constitutes a faithful digital representation of the geologic data presented in the published paper map.

A digital geologic map database of the west half of the Blythe 30' by 60' quadrangle also is available. That database was published as part of U.S. Geological Survey Scientific Investigations Map (SIM) 2922. Unlike the database of the present report, the database of SIM 2922 contains new geologic data in addition to, or in place of, the data contained in the original map of Open-File Report 90-497.

Text files:

Readme file: Description of data files, with an Appendix containing the description of map units, map symbols, and references from OFR 90-497 (ble_readme.txt; 40 KB)

Metadata: (ble_met.txt; 52 KB)

Arc/Info interchange files:

The two interchange files (ble_geo.e00, contacts, faults, and rock units; ble_str.e00, folds, attitudes and dip values), the metadata, and the readme are in a compressed tar file: ble.tar.gz (652 KB; 2.9 MB when uncompressed)

Page-size pdf files:

Map of Blythe 30' by 60' quadrangle showing major geographic features and area covered by geologic database (bl_map.pdf; 116 KB)

Correlation of map units diagram for the Blythe 30' by 60' quadrangle (copied from OFR 90-497) (bl_cmu.pdf; 512 KB)

Illustration showing sources of mapping for Blythe 30' by 60' quadrangle (copied from OFR 90-497) (bl_index.pdf; 640 KB)

Chart showing correlation of members A-L of the McCoy Mountains Formation (copied from OFR 90-497) (bl_mccoy.pdf; 684 KB)

There is no map plot included with this report. A scan of the paper geologic map published as OFR 90-497 can be viewed at http://ngmdb.usgs.gov/Prodesc/proddesc_17950.htm.

For questions about the content of this report, contact Paul Stone

Download the Version history

Database disclaimer: This database, identified as USGS Data Series 225, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.

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Page Last Modified: October 25, 2007