edited by Thomas E. Yancey ; field trip leaders: Thomas E. Yancey, Karl J. Koenig ; field trip chairman: James O. Jones ; San Antonio, Texas, May 1984 ; host: South Texas Geologist Society
editors, Karen Grove and Stephen Graham ; [prepared for presentation at the 1986 Fall fieldtrip of the Pacific Section of the Society of Economic Paleontologists and Mineralogists held at Nacimiento Lake, California] October 4-5, 1986
Department of the Interior, U.S. Geological Survey ; by Ronald C. Johnson ; prepared in cooperation with the Utah Geological and Mineral Survey and the Colorado Geological Survey
Date
1989
Series
Miscellaneous investigations series (Geological Survey (U.S.)) ; I-1974