Skip to Main Content
Book Chapter

Sub-Pennsylvanian disconformity near Shoals, Indiana

Henry H. Gray
Henry H. Gray
Geological Survey
611 North Walnut Grove, Bloomington, Indiana 47405
Search for other works by this author on:
January 01, 1987


This site is along a spur railroad cut in the W½NE¼Sec. 28, T.3N., R. 3W., Martin County, Indiana (Fig. 1). It is shown on theHuron 7½-minute Quadrangle and is accessible by foot from acounty road that crosses the railroad just south of the cut. The cutis on the property of the National Gypsum Company, Shoals Plant, and permission to visit should be requested, particularly forgroups.

This is the best and most revealing exposure of the sub-Pennsylvanian disconformity in southern Indiana and is one ofthe best in the entire Illinois Basin. A small pre-Pennsylvanianvalley with about 50 ft (15 m) relief is well shown, and manyfeatures of the rocks above and below the contact are also illustrated. This is an excellent introduction to the stratigraphy ofmuch of southwestern Indiana.

You do not currently have access to this article.

Figures & Tables


DNAG, Centennial Field Guides

North-Central Section of the Geological Society of America

Geological Society of America
ISBN electronic:
Publication date:
January 01, 1987




Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal