Wildcat Den State Park, Iowa
Trails wind through a variety of terrain, leading to geological formations along the trail’s sandstone bluffs.
The oldest bedrock, exposed along the margins of Pine Creek, includes about 25 feet of fossiliferous limestone and dolomite (“magnesian limestone”) of the Cedar Valley Group. These rock layers formed from lime sediments that accumulated in shallow tropical seas that covered the region during the Devonian Period about 375 million years ago.
Shale and sandstone formations above this come from river deposits during the Pennsylvanian (Carboniferous.)
