Stratigraphic significance and petrology of phosphate nodules at base of Niobrara Formation, east flank of Black Hills, South Dakota
By: by Harry A. Tourtelot and W. A. Cobban.
Contributors: Cobban, William Aubrey, 1916- joint author.
Series: Shorter contributions to general geology; Geological Survey professional paper 594-L; Shorter contributions to general geology.; Geological Survey professional paper ;; 594-L.
Publisher: U.S. Govt. Print. Off.
Published: 1968
Place of publication: Washington
Language: eng
Number of pages: 22
Subjects: Geology, Stratigraphic -- Cretaceous.; Phosphates -- Black Hills.; Phosphates -- South Dakota.; Geology -- Black Hills.; Geology -- South Dakota.; Niobrara Formation.
Notes: Bibliography: p. 18-20.