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General Information

Title: Marine Jurassic formations of Montana
Author(s): Imlay, R.W., Gardner, L.S., Rogers, C.P., Jr., and Hadley, H.D.
Publishing Organization: U.S. Geological Survey
Series and Number: Oil and Gas Investigations Chart OC-32
Publication Date: 1948
Map Scale: 1:2,816,000
Cross Section: None
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Geologic units referred to in Geolex

Ellis, Piper, Rierdon, Swift

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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.

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Page Last Modified: Tue 04 Jun 2024 05:07:51 PM MDT