The Bishop Ash Bed (middle Pleistocene) and some older (Pliocene and Pleistocene) chemically and mineralogically similar ash beds in California, Nevada, and Utah.  By Glen A. Izett [and others]
Publisher: Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 37
Subjects: Volcanic ash, tuff, etc. - West (U.S.)
Notes: 11