The Devonian Fossil Gorge was exposed after two major, catastrophic floods in central Iowa (’93 and 2008). The torrential flows of water exposed an area of fossilized sea bed from the Devonian era (375 million year ago – give or take). The largest and most noticeable fossils – shells and coral – are on the steps down into the gorge. Other larger, more noticeable fossils embedded in the rocks higher up at the far end of the gorge. Plenty of smaller fossils are scattered throughout the gorge bed, though these take a sharp eye to find. A fascinating visit for any rock hound.
Coralville Lake & Devonian Fossil Gorge
2850 Prairie du Chien Rd NE
Iowa City, IA 52240