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Geologic Unit: Sewickley
Map showing publication footprint
  • Usage in publication:
    • Sewickley Member*
  • 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:

Figure 75.2 (a chart showing historic and revised stratigraphy) shows the Sewickley Member of the Pittsburgh Formation of the Monongahela Group in Washington Co., southwestern PA. Also indicates that strata previously assigned to Dinsmore Limestone Bed of Benwood Limestone Member of the Monongahela Formation by other workers are now assigned to Benwood Limestone Bed of Sewickley Member of Pittsburgh Formation of Monongahela Group. Sewickley coal, previously below Monongahela Formation, is now basal part of Sewickley Member.

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


Map showing publication footprint
  • Usage in publication:
    • Sewickley Member*
  • Modifications:
    • Overview
  • 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:

Used as Sewickley Member of Pittsburgh Formation in PA. Equivalent to Sewickley cyclothem of OH.

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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