The Berea Sandstone and the Bedford Shale were deposited in a river delta environment in the Lower Mississippian. River channels were incised into the Bedford Shale and subsequently these channels were filled by the Berea Sandstone. Besides setting the stage for majestic gorges and waterfalls within the valley, they have provided an economic use as well. The Berea Sandstone was quarried in Berea for grindstones and building stones, while the lowermost part of the Bedford Shale was quarried in South Euclid and Cleveland Heights for its bluestone.