TY - BOOK T1 - Stratigraphic identification of middle Tertiary ash-flow tuffs using trace-element abundances, Worthington Mountains, Nevada DA - 1995. CY - [Reston, Va.] : AU - Du Bray, E. A. VL - 95-545 CN - I 19.76: PB - U.S. Dept. of the Interior, U.S. Geological Survey, PP - [Reston, Va.] : PY - 1995. N1 - Shipping list no.: 97-0317-M. ID - 219984 KW - Volcanic ash, tuff, etc. KW - Geology TI - Stratigraphic identification of middle Tertiary ash-flow tuffs using trace-element abundances, Worthington Mountains, Nevada ER -