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Image	Taxa	Strat Unit	Contributor
	Arthroacantha carpenteri	Silica formation	Richard Heimlich
Submitted on 2008-03-12 by Richard Heimlich Location (approximate): Sylvania, Lucas, OH Strat unit: Silica formation Submitter notes: Two beautiful Arthroacantha crowns on a slab that measures 84mm x 94mm. Photo title: Crinoid Crowns Taxa present: Arthroacantha carpenteri View full record
	Gilbertsocrinus ohioensis	Silica formation	Richard Heimlich
Submitted on 2008-03-12 by Richard Heimlich Location (approximate): Sylvania, Lucas, OH Strat unit: Silica formation Submitter notes: This crown has its plate structure completely obscured by heavy pyritization. Photo title: Pyritized Crinoid Crown Taxa present: Gilbertsocrinus ohioensis View full record