What of type of bedrock make up the Allegheny plateau?

The Allegheny Plateau is primarily composed of sedimentary bedrock, including sandstone, shale, and limestone. These rock types were formed from ancient marine environments and are often layered, reflecting the geological history of the region. The plateau's bedrock is also characterized by coal deposits, which were formed from ancient plant materials during the Carboniferous period. This diverse geological composition contributes to the plateau's unique topography and ecosystems.