Tullimonstrum Gregarium
Tullimonstrum Gregarium
Size of concretion 17 cm Long X 6.5 cm Wide
Pennsylvanian
Carbondale Formation
Braidwood ,Illinois
By Bob
Tullimonstrum Gregarium
Size of concretion 17 cm Long X 6.5 cm Wide
Pennsylvanian
Carbondale Formation
Braidwood ,Illinois
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