The Spieden Formation is a geologic formation in the US state of Washington. It preserves fossils dating back to the Cretaceous period. See also List of…
The Spieden Formation is a geologic formation in the US state of Washington. It preserves fossils dating back to the Cretaceous period.
See also
List of fossiliferous stratigraphic units in Washington (state) Paleontology in Washington (state)
References PaleoDB collection 83571
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