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Typical Pennsylvanian crinoidal limestone

Typical Pennsylvanian crinoidal limestone.jpg Typical modern crinoidThumbnailsTypical radiolariansTypical modern crinoidThumbnailsTypical radiolariansTypical modern crinoidThumbnailsTypical radiolariansTypical modern crinoidThumbnailsTypical radiolariansTypical modern crinoidThumbnailsTypical radiolarians