1. Generalized geologic map of the southern Sierra Nevada, California, showing the location of samples for which K-Ar radiometric age data and Rb/Sr data have been determined [cartographic material] Yale Public content 1983. 2002-06-01T04:00:00Z. 2023-07-01T03:01:22Z. Geological Survey (U.S.). The Survey. English. text. Public. California and Sierra Nevada Mountains Region (Calif. and Nev.).