The Bishop Ash Bed (middle Pleistocene) and some older (Pliocene and Pleistocene) chemically and mineralogically similar ash beds in California, Nevada, and Utah /
Izett, Glen Arthur,1928-
Washington : U.S. Government Printing Office,
1988.
Geology, Stratigraphic
Geology, Stratigraphic
Volcanic ash, tuff, etc.
Geology