petroxestes pera bivalve borings on limestone hardground (upper ordovician; cincinnatian area, usa) 3 color palette

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#676767 #232321 #999999 #D4D4D4 #817F7F

related tags: 807F7F 817F7F D4D4D4 bivalve bivalves boring borings cincinnatian clam clams corallidomus formation fossil fossils hardground hardgrounds layer layers ordovician pera petroxestes scobina track tracks turkey waynesville 232221 232321 676767 999999