Monongahela Formation

Monongahela Formation, also Monongahela Group
Stratigraphic range: Upper Pennsylvanian
Gzhelian
~300–303 Ma
↓
Coal from the Monongahela Formation
TypeGroup in Ohio, Pennsylvania, parts of West Virginia and Maryland, sometimes also seen as Formation
Sub-unitsUniontown Formation
Waynesburg Coal (No 11. Coal)
Gilboy Sandstone Member
Little Waynesburg Coal
Waynesburg Limestone Member
Uniontown Sandstone Member
Annabelle Shale Member
Uniontown Coal (No. 10 Coal)
Uniontown Limestone Member "Great Lime"
Fulton Shale Member

Pittsburgh Formation

Benwood Limestone Member
Upper Sewickley Coal
Upper Sewickley Sandstone Member
Sewickley (Meigis Creek) Coal (No. 9 Coal)
Lower Sewickley Sanstone Member
Sewickley Limestone Member
Cedarville Sanstone Member
Redstone-Pomeroy coal (No 8a. Coal)
Westone Sanstone Member
Pittsburgh coal seam (No 8. Coal)
UnderliesWashington Formation[1]
OverliesConemaugh Group
Location
RegionWest Virginia, Pennsylvania, Ohio, Maryland
CountryUnited States

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 Pittsburgh coal is the thickest and most extensive (11,000 sq mi) bituminous coal bed in the Appalachian Basin[2]

  1. ^ Martin, Wayne D. (1998). "GEOLOGY OF THE DUNKARD GROUP (UPPER PENNSYLVANIAN-LOWER PERMIAN) IN OHIO, WEST VIRGINIA, AND PENNSYLVANIA" (PDF). Bulletin. 73: 1–49. Retrieved 14 November 2019.
  2. ^ Ruppert, Leslie F; Tewalt, Susan J; Bragg, Linda J; Wallack, Rachel N (2000). "A digital resource model of the Upper Pennsylvanian Pittsburgh coal bed, Monongahela Group, northern Appalachian basin coal region, USA". International Journal of Coal Geology. 41 (1–2): 3–24. doi:10.1016/s0166-5162(99)00009-9. ISSN 0166-5162.