Silica Bivalves

Submitted by: David Thompson
Taxon: Grammysia nodocostata, Grammysia sylvaniensis
Submit date: 2008-05-13
Location (approximate): Milan, Washtenaw, MI
Stratigraphy: Silica Formation
Age: Erian (Middle Devonian)
Submitter notes: Another view of the bottom of the G. sylvaniensis and the larger nodocostata,

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