The Bishop Ash Bed (Middle Pleistocene) and Some Older (Pliocene and Pleistocene) Chemically and Mineralogically Similar Ash Beds in California, Nevada, and Utah;
Washington: United States Government Printing Office, 1988. softcover, 11" x 8.5", two folded sheets inside rear pocket, 37 pages, illustrated. from the introduction, "The chief purpose of this report is to tabulate previously unpublished mineralogical and chemical data for a comagmatic group of over 40 middle Pleistocene volcanic ash beds..... More
