Mahantango Formation, Trinity Church site, Fort Valley, Virginia.
Hutton's classic unconformity (Devonian red beds over Silurian graywacke and shale).
At the Caves of Cushendun, an arkosic conglomerate can be found.
Volcanic rock at crazy storm beach near Eshaness. Devonian aged ignimbrite.
Pressure solution seams in Devonian-aged Helderburg Group limestone from Corridor H.
Arkose from the Devonian-aged Old Red Sandstone. Found in Northern Ireland on the beach at Cushendun.
Evidence of latest Devonian glaciation in the Appalachian Basin.
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