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This publication is part of a folio of maps and cross sections of the northern Midcontinent area (bounded by lat 36°-46° N. and long 88°-100° W.) prepared under the Midcontinent Strategic and Critical Minerals Project. This project is a cooperative activity between the U.S. Geological Survey and the geological surveys of the included States. Other maps in this folio published to date include U.S. Geological Survey Miscellaneous Field Studies Maps MF-1835-A through F (Mugel, 1986; Jorgensen and others, 1986; Marvin, 1988; Pratt, 1987; Anderson, 1988; Hills and others, 1991) and U.S. Geological Survey Miscellaneous Investigations Series Maps I-1853-A (Sims, 1990) and 1-2214 (Sims and others, 1991). Additional maps in the folio showing various geologic aspects of the same area may be published in this same map series with different letter suffixes (MF-1835-H, I, and so on).

Lithologic cross sections of phanerozoic rocks in the northern Midcontinent, U.S.A.