1.75" Fossil Nautilus (Eutrephoceras) in Limestone - South Dakota

This is a beautiful, 1.75" wide fossil Nautilus (Eutrephoceras) from the Fox Hills Formation of South Dakota. It has been prepared free of the hard concretion it was found in, with a small portion still connected with the rock, allowing for aesthetic presentation.

These 70 million year old ammonites lived when South Dakota was a shallow inland sea. It was found preserved in a concretion that was split open. It then had to be hand prepared to remove the hard rock surrounding it from the shell, a very time consuming task.
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DETAILS
SPECIES
Eutrephoceras sp.
LOCATION
Dewey County, South Dakota
FORMATION
Fox Hills Formation - Timber Lake Member
SIZE
1.75" wide
CATEGORY
ITEM
#155427
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