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Invertebrates: Pelecypods: Fossil Pearl |
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Written by Keith Minor
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Turonian Age Pearl 
Remarks - Here’s a rare beauty bestowed on us by Lee Duchouquette. This one was collected from the Upper Eagle Ford Group, Kamp Ranch Member of the Arcadia Park Formation, Dallas County, TX.
- Inoceramid clams (Inoceramus (Volviceramus), Inoceramus (Platyceramus), etc., to name a few genera) can get quite large and are extremely common in Upper Cretaceous rocks, and have been implicated by a couple of authors as the source of these pearls.
General Info Some documented occurrences from the U.S. Cretaceous - Colorado Group, Niobrara Formation (Smoky Hill Member) of Western Kansas
- Upper Eagle Ford Group, Kamp Ranch Member, Arcadia Park Formation of North–Central Texas
Age - The pearl shown is Middle Turonian in age (~91 mya).
Geographic Occurrence (not an all-inclusive list) - Dallas County, TX
- Gove County (?), KS
Remarks A nice photograph of Kamp Ranch with 3 pearls can be found in Finsley: - Finsley, C. 1989. A Field Guide to Fossils of Texas. Austin: Texas Monthly Press, plate 8.
See also:
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Last Updated ( Sunday, 06 April 2008 )
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