National Geochronological Database

Online link http://pubs.usgs.gov/of/2003/0236/
Description Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.
Originators Sloan, Jan (Editor); Henry, Christopher D. (Editor); Hopkins, Melanie J. (Editor); Ludington, Stephen D. (Editor); Zartman, Robert E. (Compiler); Bush, Charles A. (Compiler); and Abston, Carl C. (Compiler)
Publication U.S. Geological Survey Open-File Report 03-236
Metadata Questions and answers