The Pleistocene exposures on Capitol Hill at Des Moines have become classic through the studies made by McGee and Call which demonstrated the presence of glacial drift overlying loess. The results of these studies were published in the American Journal of Science, Volume 24, 1882, pp. 202-223.
Proceedings of the Iowa Academy of Science
©1916 Iowa Academy of Science, Inc.
Lees, James H.
"The Pleistocene of Capitol Hill,"
Proceedings of the Iowa Academy of Science, 23(1), 167-172.
Available at: https://scholarworks.uni.edu/pias/vol23/iss1/28