Hi Canie and Chris. Here is something that may be relevant. Not sure as to how if fits in with the age of the area. Take Care…Don in creepy town

About 35 million years ago—the dinosaurs are dead, but the Appalachian Mountains are still covered in tropical rain forests—a rock from space that was more than a mile wide and moving at supersonic speed crashed into the Atlantic Ocean off North America.

Traveling at about 70,000 miles (113,000 kilometers) an hour, the asteroid or comet (bolide) splashed through several hundred feet of water and several thousand feet of mud and sediment.

• Chesapeak Crater