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Pennsylvanian cyclothem near Winterset, Iowa

Philip H. Heckel
Philip H. Heckel
Department of Geology, University of Iowa, Iowa City, Iowa 52240
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January 01, 1987


This section is located on the west side of U.S. 169 about 1.7 mi (2.7 km) south of its junction with Iowa 92 on the western outskirts of Winterset (Fig. 1; E line NE¼SW¼Sec.11, T.75N., R.28W., Madison County, Iowa). Because traffic on this highway can be heavy, pull well off onto the shoulder, and please do notcross the highway.

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Figures & Tables


DNAG, Centennial Field Guides

North-Central Section of the Geological Society of America

Donald L. Biggs
Donald L. Biggs
531 Hayward Avenue Ames, Iowa 50010
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Geological Society of America
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Publication date:
January 01, 1987




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