Organic remains furnish the best criterion for the measure of conditions which prevailed during any given age of the earth's geological history, provided, of course, that their relation to the deposit can be clearly shown.
Proceedings of the Iowa Academy of Sciences
©1897 Iowa Academy of Science, Inc.
"Is the Loess of Aqueous Origin?,"
Proceedings of the Iowa Academy of Science, 5(1), 32-45.
Available at: https://scholarworks.uni.edu/pias/vol5/iss1/8