Resolving Discrepancies Between Surface and Subsurface Studies of the Maquoketa Formation of Northeast Iowa

Authors

Mary C. Parker, Iowa Geological SurveyFollow
Fred H. Dorheim, Iowa Geological SurveyFollow
Russell B. Campbell, Iowa Geological SurveyFollow

Document Type

Research

Abstract

The Maquoketa formation in the outcrop area has been assigned a maximum thickness of 257 feet by earlier surface workers. Recent subsurface study in the same area reveals a thickness of 300-320 feet of Maquoketa sediments. Until now the correlation of subsurface units to recognized surface members has been hampered by this discrepancy. The recognition and identification of a new unit in the Elgin member of the Maquoketa formation, and a greater measured thickness of the Isotelus zone has resolved this difference.

Publication Date

1959

Journal Title

Proceedings of the Iowa Academy of Science

Volume

66

Issue

1

First Page

248

Last Page

256

Copyright

©1959 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Parker, Mary C.; Dorheim, Fred H.; and Campbell, Russell B. (1959) "Resolving Discrepancies Between Surface and Subsurface Studies of the Maquoketa Formation of Northeast Iowa," Proceedings of the Iowa Academy of Science, 66(1), 248-256.
Available at: https://scholarworks.uni.edu/pias/vol66/iss1/35