Ft. Worth Formation Echinoid

Phyllacanthus hemigranosus	Phyllacanthus hemigranosus
Phyllacanthus hemigranosus	Phyllacanthus hemigranosus

This Phyllacanthus hemigranosus came from the Oklahoma side of Lake Texoma.  In Oklahoma the Ft. Worth Formation and Duck Creek Formation is part of the Cado Formation.

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