1. Geologic map of California [cartographic material] Yale Public content 1938. 2018-05-09T16:47:57Z. 2018-09-05T19:35:57Z. Jenkins, Olaf P. (Olaf Pitt), 1889-1983. Division of Mines. English. cartographic image. Public. California, Sierra Nevada (Calif. and Nev.), California., United States, and Sierra Nevada.