coal beds host:www.mgs.md.gov

Listing 1 - 2 from 2 for coal beds

Maryland Geological Survey: Swallow Falls, Garrett County, MD
... Youghiogheny River in the Conemaugh formation. The Conemaugh contains claystones, siltstones, shales, sandstones and several coal beds and contains fossils. These rocks date to the Pennsylvanian Period and are about 300 million ...
www.mgs.md.gov

Maryland Geological Survey: Dans Rock, Allegany County, MD
... the Pottsville formation on Dans Mountain. . The Pottsville contains sandstones, siltstones, claystones, shales, and several coal beds. These rocks date to the Pennsylvanian Period and are about 300 million years old. The ...
www.mgs.md.gov