The Aspen Shale is a geologic formation in southwestern Wyoming, United States. It preserves fossils dating back to the Albian stage of the Cretaceous period,…
The Aspen Shale is a geologic formation in southwestern Wyoming, United States. It preserves fossils dating back to the Albian stage of the Cretaceous period, around 100.5–133 million years ago.
See also
List of fossiliferous stratigraphic units in Wyoming Paleontology in Wyoming
References
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