The “Wall Rock” of White Medina Sandstone is a cliff-forming layer of sandstone that is found near the source of Cummins Creek in Pocahontas County, West Virginia. The sandstone is part of the Medina Group, which is a sequence of sedimentary rocks that were deposited during the Devonian Period, about 419 to 385 million years ago.
The Wall Rock is a white, fine-grained sandstone that is typically about 10 to 20 feet (3 to 6 meters) thick. The sandstone is very resistant to erosion, which is why it forms cliffs. The Wall Rock is also a good source of building stone, and it was used to construct many of the early buildings in Pocahontas County.
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