Hodnett said the reason for this shark abundance is likely due to the series of seaways and embayments that crisscrossed the region in the Mississippian Period more than 300 million years ago ...

Geologists call this time period the Mississippian Period, when shallow seas covered much of North America including where Mammoth Cave is today. The Mississippian age ancient sea and marine life ...

Genevieve Formation, a layer of rocks in the park that dates back approximately 340 million years during a time known as the Middle Mississippian period. Molly Schorer, the park’s public ...