AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from South Dakota > Hoploscaphites Cheyennensis and Sphenodiscus Lenticularis Fossil

Hoploscaphites Cheyennensis and Sphenodiscus Lenticularis Fossil from Fox Hills Formation, Pennington County, South Dakota

DESCRIPTION:	No. 41159
Mineral:	Hoploscaphites Cheyennensis and Sphenodiscus Lenticularis Fossil
Locality:	Fox Hills Formation, Pennington County, South Dakota
Description:	Fossilized hoploscaphites 18 mm across exposed in sedimentary matrix with a larger sphenodiscus fossil on the right end. The original mother of pearl inner shell layer is still present on the outside of the hoploscaphites with greenish iridescence.
Overall Size:	8x6x4 cm
Crystals:
Archived:	For reference only

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