Ft. Pierre Shale
Location: U.S., Iowa, Sioux Co.; Near Hawarden.
Geologic Age: Cretaceous, Ft. Pierre Shale.
Photograph No. 1102
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Any additional plates from the Calvin Collection are listed below.
These will be added to the database in due course, but if you are interested in seeing them in advance, please contact Tiffany Adrain.