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Geologic Unit: Monongahela
Map showing publication footprint
  • Usage in publication:
    • Monongahela series
  • Modifications:
    • Named
  • AAPG geologic province:
    • Appalachian basin
Publication:

Rogers, H.D., 1840, Fourth annual report of the Geological Survey of the State of Pennsylvania: Pennsylvania Geological Survey Annual Report, no. 4, 215 p.


Summary:

Upper coal measures exposed along the Monongahela River is called the Monongahela series. Includes beds previously called Pittsburg series by Rogers. Overlies what is called Allegheny series.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Monongahela Group*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Berryhill, H.L., and Swanson, V.E., 1962, Revised stratigraphic nomenclature for Upper Pennsylvanian and Lower Permian rocks, Washington County, Pennsylvania, IN Geological Survey Research 1962; short papers in geology, hydrology, and topography; Articles 60-119: U.S. Geological Survey Professional Paper, 450-C, p. C43., See also GeoScience Abs., v. 4, no. 12, pt. 1, Dec. 1962 (summary)


Summary:

Monongahela raised to group rank in southwestern PA. Includes lower Pittsburgh Formation and upper Uniontown Formation. Pittsburgh Formation consists of strata from base of Pittsburgh coal bed to base of Uniontown coal bed, and includes lower unnamed member, Redstone, Fishpot and Sewickley Members, and upper unnamed member. Sewickley Member includes Benwood Limestone Bed. Uniontown consists of unnamed lower and upper members, and includes strata from base of Uniontown coal bed to base of Waynesburg coal bed; Waynesburg coal bed, formerly included as uppermost bed of Monongahela Formation, is reassigned to base of overlying Waynesburg Formation (revised). Age is Late Pennsylvanian.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Monongahela Formation*, Group*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Rice, C.L., Hiett, J.K., and Koozmin, E.D., 1994, Glossary of Pennsylvanian stratigraphic names, central Appalachian basin, IN Rice, C.L., ed., Elements of Pennsylvanian stratigraphy, central Appalachian basin: Geological Society of America Special Paper, 294, p. 115-155.


Summary:

Monongahela Formation is used in PA, MD, OH, and WV (not in KY). Includes strata from base of Pittsburgh coal to top of Waynesburg coal. Locally raised in rank to Monongahela Group and divided into Pittsburgh and Uniontown Formations.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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