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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Glenshaw Formation
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968, Geologic Map of West Virginia: West Virginia Geological and Economic Survey, scale 1:250,000


Summary:

Geographically extended the Glenshaw Formation of the Conemaugh Group into WV. Consists of cyclic sequence of red and gray shale, siltstone, and sandstone with thin limestones and coals. The base of the Glenshaw is placed at the top of the Upper Freeport coal bed. Unit overlies the Allegheny Formation and underlies the Casselman Formation. The Glenshaw includes the Ames Limestone Member at the top.

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


Map showing publication footprint
  • Usage in publication:
    • Glenshaw Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Roen, J.B., Kent, B.H., and Schweinfurth, S.P., 1968, Geologic map of the Monongahela quadrangle, southwestern Pennsylvania: U.S. Geological Survey Geologic Quadrangle Map, GQ-743, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_2050.htm]


Summary:

The Glenshaw Formation of the Conemaugh Group in the Monongahela quadrangle, southwestern PA, occurs only in the subsurface. Consists of limestone and calcareous shale that contain marine fossils. The Ames Limestone Member makes up the upper part of the formation. Unit underlies the Casselman Formation; no lower contact was observed. The Glenshaw is of Late Pennsylvanian age.

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


Map showing publication footprint
  • Usage in publication:
    • Glenshaw Formation
  • 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:

Glenshaw Formation is used for lower part of Conemaugh Group where Ames Limestone Member is present and forms top of formation. Extends down to top of Upper Freeport coal. Used only in PA and OH. Includes Mahoning Sandstone Member in both States.

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


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

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).