That's where I collect all sorts of rocks for my rock garden.
Last time this area was a volcanic intrusion of any kind was several billion years ago. Still, there was a gigantic meteor hit the continental margin out here near the DELMARVA and that left a layered uplift of chunks ~ just like any impact crater ~ you can still make out the outlines if you know what you're looking for.
In between "Snowball" and "meteor" this was a chunk of North Africa. You find rocks typical of the region in Morocco.
No meteor, just the Genesis judgement that severed Pangea into the present continents.