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The Pittsburgh coal seam is the thickest and most extensive coal bed in the Appalachian Basin; [1] hence, it is the most economically important coal bed in the eastern United States. The Upper Pennsylvanian Pittsburgh coal bed of the Monongahela Group is extensive and continuous, extending over 11,000 mi 2 through 53 counties.
The Allegheny Group, often termed the Allegheny Formation, [2] is a Pennsylvanian-age geological unit in the Appalachian Plateau.It is a major coal-bearing unit in the eastern United States, extending through western and central Pennsylvania, western Maryland and West Virginia, and southeastern Ohio.
The Monongahela Formation is a geologic formation in West Virginia, Pennsylvania, Ohio, and Maryland.It is dated to the Carboniferous period.The top of the group is marked by the Waynesburg Coal (No. 11 Coal) and its base is marked by the Pittsburgh coal seam (No. 8 Coal).
The discovery of coal in the Pittsburgh Coal Seam in the mid-19th century marked a transformative period for Gilpin Township’s economy. This high-quality coal seam extended through several areas, including Maher Heights, Georgetown, Johnetta, and Aladdin, attracting mining companies and spurring rapid economic expansion.
The Pittsburgh coal seam is about 20 feet (6 meters) below the surface in that area. Underground coal mining has taken place in 29 of the 67 counties in Pennsylvania, and a wide swath of the state ...
The panhandle coalfield is a coalfield located in the northern panhandle of West Virginia counties of Hancock, Brooke, Ohio, Marshall, and Wetzel.Mining is primarily in the Pittsburgh coal seam, sometimes called the No. 8 seam, which is of a steam rather than metallurgical nature in this region.
The Pittsburgh Coalfield (Pittsburgh Coal Region) is the largest of the Western Pennsylvania coalfields. It includes all or part of Allegheny, Fayette, Greene, Washington, and Westmoreland Counties in Pennsylvania. Coal has been mined in Pittsburgh since the 18th century. U.S. Steel and Bethlehem Steel owned Karen, Maple Creek, and Ellsworth ...
The Casselman Formation mapped sedimentary bedrock unit in Pennsylvania, Maryland, and West Virginia, of Pennsylvanian age. It is the uppermost of two formations in the Conemaugh Group, the lower being the Glenshaw Formation.