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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 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 ...
A coalfield is an area of certain uniform characteristics where coal is mined. The criteria for determining the approximate boundary of a coalfield are geographical and cultural, in addition to geological. A coalfield often groups the seams of coal, railroad companies, cultural groups, and watersheds and other geographical considerations.
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).
This is because the section of the Pittsburgh coal seam here was famous as one of the finest metallurgical coals in the world. It is locally known as the Connellsville coal seam, but is a portion of the Pittsburgh seam. Coal was mined in this field from the early 19th century. Actual coking of the coal was first tried near Connellsville in the ...
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.
Bethel Park is underlain by the Pennsylvania-age Monongahela Formation. The Monongahela Formation consists of the Uniontown member and the underlying Pittsburgh member, and the base is the Pittsburgh coal seam. Much of southern Allegheny County is undermined, and the PADEP indicates that all of Bethel Park was undermined. [12]
In the early history of Pittsburgh, Mount Washington was known as Coal Hill, but Coal Hill was actually on the south bank of the Monongahela River. [1] Easy access to the Pittsburgh coal seam's outcrop near the base of Mount Washington allowed several mines to operate there. Also, rock was quarried from the hill.