Cover title.
"The following papers were presented as posters or oral presentations at a meeting in Elko, Nevada, on September 19 and 20, 1991, sponsored by the Elko chapter of the Geological Society of Nevada."
Distributed to depository libraries in microfiche.
Shipping list no.: 92-2148-M.
Microfiche. [Denver, Colo. : U.S. Geological Survey, 1992] 1 microfiche.