Western Earth Surface Processes
The general location and age of more than 33,500 mostly foraminifer samples from Chevron surface localities in nearly 600 U.S. Geological Survey (USGS) 7.5’ quadrangles from California were provided by Brabb and Parker (2003). Barren and non-diagnostic samples plus many that have no paleontologic information were omitted to provide a revised list for more than 27,000 of these samples by Brabb and Parker (2005). The locations for many of these samples were recorded by Chevron geoscientists on topographic maps (originals now in the USGS Library in Menlo Park, Calif.). The recent availability of digital databases for geologic and topographic maps has provided the opportunity to prepare a database of the locations of these Chevron samples so that the information can be combined with geology and topography for plotting or geospatial analysis. This report provides specific locations for more than 13,000 samples in central California that have enough paleontologic information to determine their age but omits thousands of samples that are too closely spaced to differentiate or those that have only a general location.
Download the text of this paper as a 6-page PDF file (of2008-1187_text.pdf; 56 kB)
Download the readme file for this report as a 1-page PDF file. This file explains the database files linked below (of2008-1187_readme.pdf; 16 kB)
This database provides latitude, longitude, and age for more than 13,000 Chevron surface localities from 427 USGS 7.5' quadrangle maps in California. The file is arranged by USGS quadrangle.
Download Chevron Database #1 as an Excel file (of2008-1187_database_1.xls; 1.5 MB).
Download Chevron Database #1 as a comma-separated-value file (of2008-1187_database_1.csv; 808 kB).
Download Chevron Database #1 as a tab-separate-ASCII file (of2008-1187_database_1.txt; 808 kB).
This database shows the number of well-located and dated Chevron foraminifer samples from 428 USGS 7.5Õ quadrangles. This file will be useful to anyone wanting to find out how many localities are in any particular quadrangle.
Download Chevron Database #2 as an Excel file (of2008-1187_database_2.xls; 64 kB).
Download Chevron Database #2 as a comma-separated-value file (of2008-1187_database_2.csv; 16 kB).
Download Chevron Database #2 as a tab-separate-ASCII file (of2008-1187_database_2.txt; 16 kB).
For questions about the content of this report, contact Earl Brabb or Bonnie Murchey
Suggested citation and version history
Download a free copy of the latest version of Adobe Reader.
|
Help |
PDF help |
Publications main page |
| Western Open-File Reports for 2008 |
| Geologic Division | Western Earth Surface Processes |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/2008/1187/
Page Contact Information: Michael Diggles
Page Created: September 4, 2008
Page Last Modified: September 4, 2008
