Canaan Valley - Geology

Geology

Canaan Valley — like the very similar Burke's Garden in Virginia — is a southern "muskeg" occupying an anticline valley. The Valley itself is carved into the low dome of sedimentary rock known as the Blackwater Anticline, exposing the soft shales of the Mauch Chunk Formation. In the Canaan Valley region, the Blackwater River began carving into the underlying sedimentary rock layers of Mississippian and Pennsylvanian age (345-270 millions years ago) about one million years ago. The hard, erosion-resistant Pottsville Formation of sandstones is the higher layer supporting the mountains surrounding Canaan Valley and also constitutes the sharp rim of the nearby Blackwater Gorge. Tombstone-like outcroppings of Greenbrier Limestone are also exposed at places along the Valley floor. A relatively high area within the Valley – the Central Pocono Ridge – is composed of the erosion-resistant Pocono Group sandstone.