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Clastic rocks associated with the Midcontinent Rift System in Iowa
Clastic rocks, midcontinent rift system, Iowa."
v, 145 pages : illustrations, maps ; 28 cm.
"U.S. Department of the Interior, U.S. Geological Survey"--Title page verso.
Includes bibliographical references (pages 138-140).
Strategic and critical minerals in the midcontinent region, United States ; ch. I