The need of a number of independent criteria in the broader work of geologic correlation has never been more apparent than at the present time. Yet for necessary reasons geologists have been slow in applying in the field what they have been convinced of in their theoretical musings.
Proceedings of the Iowa Academy of Sciences
©1902 Iowa Academy of Science, Inc.
Keyes, Charles R.
"Comparative Values of Different Methods of Geologic Correlation in the Mississippi Basin,"
Proceedings of the Iowa Academy of Science, 10(1), 105-107.
Available at: https://scholarworks.uni.edu/pias/vol10/iss1/18