Ar 40/Ar 39 age of the Manson, Iowa, impact structure and coeval impact ejecta in the Crow Creek member of the Pierre Shale, South Dakota and Nebraska
By: by G.A. Izett ... [et al.].
Contributors: Izett, Glen Arthur, 1928-; Geological Survey (U.S.)
Series: Open-file report -- 97-523; U.S. Geological Survey open-file report -- 97-523.
Publisher: U.S. Dept. of the Interior, Geological Survey
Published: 1997
Place of publication: Reston, Va
Language: eng
Format: Microform
Number of pages: 49
Subjects: Meteorite craters -- Iowa -- Manson Region.; Argon-argon dating.; Cryptoexplosion structures -- Iowa -- Manson Region.; Geology -- Iowa -- Manson Region.; Geology -- South Dakota.; Geology -- Nebraska.
Other titles: Ar40/Ar39 of the Manson, Iowa, impact structure and coeval impact ejecta in the Crow Creek member of the Pierre Shale, South Dakota and Nebraska; Argon 40/Argon 39 age of the Manson, Iowa, impact structure and coeval impact ejecta in the Crow Creek member of the Pierre Shale, South Dakota and Nebraska
Notes: Cover title.

Shipping list no.: 99-0312-M.

"October 1997."

Includes bibliographical references (leaves 20-27).

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1998?] 1 microfiche : negative.