Clastic rocks associated with the Midcontinent Rift System in Iowa - Anderson, Raymond R.; McKay, Robert M.; United States Geological Survey (Washington : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1997)
Includes bibliographical references (p. 138-140).
Keywords: Geology, Stratigraphic -- Proterozoic; Geology -- Iowa; Keweenawan Rift