Stratigraphy of the Tertiary ash-flow tuffs in the Yerington district, Nevada, by John M. Proffett, Jr. and Beth H. Proffett, 1976.

A detailed description and formal stratigraphic treatment of middle Tertiary ash-flow tuffs in the Yerington mining district, western Nevada; references.

Regional overviews of geology are in B49 and B75.

Report 27, 28 pages, 11x8.5", 6 b/w drawings, 1 two-color drawing, 11 b/w photos, 4 tables, $4.00