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Big Sandy Formation near Wikieup, Mohave County, Arizona

Sheppard, Richard A., author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1972. 1972

The Bishop Ash Bed (Middle Pleistocene) and some older (Pliocene and Pleistocene) chemically and min

Izett, Glen Arthur, 1928- author.
[Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1988. 1988

Lithologic characteristics of Pliocene rocks cored at Elk Hills, Kern County, California

Berryman, William M., author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1973. 1973

Pliocene and Pleistocene fossils from the arctic coast of Alaska and the Auriferous Beaches of Nome,

Dall, William Healey, 1845-1927, author.
[Washington] : [Department of the Interior, United States Geological Survey], [1920] 1919

Pliocene and Quaternary deposits in the northern part of the San Juan Basin in southwestern Colorado

Scott, Glenn Robert, 1918-2012.
Reston, Va. : U.S. Geological Survey, 2007. 2007

The pliocene history of northern and central Mississippi

Shaw, E. W. (Eugene Wesley), 1881-1935, author.
Washington : Department of the Interior, United States Geological Survey, 1918. 1917

The Purisima Formation and related rocks (upper Miocene - Pliocene), greater San Francisco Bay area,

Powell, Charles L. (Charles Lewis), 1953-
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : USGS Information Service [distributor], 1998. 1998

Silicified rock in the Ogallala formation

Frye, John Chapman, 1912-1982.
[Lawrence] : State Geological Survey of Kansas, 1946. 1946

Split rock formation (Miocene) and moonstone formation (Pliocene) in central Wyoming

Love, J. D. (John David), 1913-2002 author.
Washington, D.C. : United States Department of the Interior, Geological Survey, 1961. 1961

Stratigraphic revision of upper Miocene and lower Pliocene beds of the Chesapeake group, middle Atla

Ward, Lauck W., author.
[Reston, Va.] : United States Department of the Interior, Geological Survey, 1980. 1980

Stratigraphy of the Glenns Ferry Formation from Hammett to Hagerman, Idaho

Malde, Harold E. (Harold Edwin), 1923-2007, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1972. 1972

Upper Miocene and Pliocene marine stratigraphy in southern Salinas Valley, California

Durham, David L., 1925- author.
Washington, D.C. : United States Department of the Interior, Geological Survey, 1964. 1964

Valley erosion since Pliocene "Algal limestone" deposition in central Kansas

Frye, John Chapman, 1912-1982.
Lawrence : State Geological Survey of Kansas, 1945. 1945