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Volume

94-1

Publication Date

12-1994

Publisher

Geological Survey Bureau, Iowa Department of Natural Resources,

Description

Includes Table of Contents, background, brief geologic history, description of map units, Figure 1, Acknowledgements, and references.

Total Pages

13 pages

Comments

Supported by the U.S. Geological Survey, Department of the Interior, under assistance Award no. 1434-93-A-1152.

Rights Information

Publication of the State of Iowa. This publication is a public record.

Geologic Overview, Description of Map Units, and Correlation Chart for the Surficial Geologic Materials Maps of the Letts Quadrangle, Iowa and the Blanchard Island Quadrangle, Illinois - Iowa

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