Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 47 (1940) > Annual Issue
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
©1940 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Goshorn, Arthur
(1940)
"Glacial Marks,"
Proceedings of the Iowa Academy of Science, 47(1), 271-272.
Available at:
https://scholarworks.uni.edu/pias/vol47/iss1/65