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National geochronological and natural radioelement data bases

Data Series 14

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Abstract

This CD-ROM contains both the National Geochronological Data Base [NGDB] and the Natural Radioelement Data Base [NRDB]. Supporting location, geologic, and reference information is provided for both data bases. The NGDB is a compilation of more than 30,000 individual published Pb-alpha, fission-track, K-Ar, Rb-Sr, U-Th-Pb, and Sm-Nd rock and mineral ages reported on approximately 18,000 dated samples from the United States. A program is provided to search the data files by latitude and longitude, state, analytical method, and age range. The NGDB is provided as quote-comma delimited files that can be entered into most commercial spreadsheet programs. The NRDB gives gamma-ray spectrometric analyses of the natural radioelements (U, Th, and K) for more than 8500 whole-rock samples obtained under the USGS Natural Radioelement Distribution Project. A program is provided to search the data files by state, keyword, U content, Th content, and K content.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
National geochronological and natural radioelement data bases
Series title:
Data Series
Series number:
14
Edition:
-
Year Published:
1995
Language:
ENGLISH
Publisher:
The Survey ; For sale by USGS Distribution Branch],
Description:
1 computer laser optical disc :col. ;4 3/4 in.