National geochronological and natural radioelement data bases /

The NGDB contains more than 30,000 individual published ages of rocks and minerals in the United States; while the NRDB contains analyses of the natural radioelements from more than 8500 whole rocks.

Bibliographic Details

Corporate Author:	Geological Survey (U.S.)
Other Authors:	Zartman, Robert E., Bush, Charles A., Abston, C. C. (Carl C.)
Format:	Government Document Book
Language:	English
Published:	[Reston, Va.] : The Survey ; 1995.
Series:	U.S. Geological Survey digital data series ; DDS-14.
Subjects:	Geological time > Databases. Radioactive substances > Databases.