1. Maps showing distribution of 12 selected elements in samples of rock, Walker Lake 1⁰?x 2⁰?quadrangle, California and Nevada, maps showing distribution Yale Public content 1988. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. California, Nevada, and Walker Lake Region.