Preliminary synthesis of subsurface stratigraphy of the Niobrara formation (Upper Cretaceous) in the northern Great Plains
By: by George W. Shurr and Jayne L. Sieverding ; United States Department of the Interior, Geological Survey
Contributors: Sieverding, Jayne L; Geological Survey (U.S.)
Series: Open-file report -- 80-1266; Open-file report (Geological Survey (U.S.)) -- 80-1266
Publisher: The Survey
Published: 1980
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Geology, Stratigraphic -- Cretaceous
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 3 microfiches ; 11 x 15 cm

Bibliography: p. 17-18