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Article Title

Glacial Marks

Authors

Arthur Goshorn

Document Type

Research

Abstract

Opening a quarry on the southern edge of a Middle River bluff, the quarryman exposed 20 feet of the top layer of limestone. The top face of the limestone was covered with glacial scratches, hundreds of them running parallel north and south. The scratches marked the direction of floor of the ice. The valley of Middle River here is deep, and its course is east and west. A number of large boulders, house size, on the uplands on the south side of the river show that the valley must have been filled with ice when the boulders crossed the river and valley.

Publication Date

1940

Journal Title

Proceedings of the Iowa Academy of Science

Volume

47

Issue

1

First Page

271

Last Page

272

Copyright

© Copyright 1940 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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