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Geologic Unit: Mercer
Map showing publication footprint
  • Usage in publication:
    • Mercer group
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Lesley, J.P., 1879, Preface, IN White, I.C., The geology of Lawrence County, to which is appended a special report on the correlation of the coal measures in western Pennsylvania and eastern Ohio: Pennsylvania Geological Survey Report of Progress, 2nd series, v. Q2, p. __.


Summary:

Mercer group is middle part of Pottsville conglomerate. Underlies Tionesta (Homewood) sandstone and overlies Connoquenessing sandstone.

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


Map showing publication footprint
  • Usage in publication:
    • Mercer Shale Member*
  • Modifications:
    • Areal extent
    • Revised
  • 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:

Mercer Shale Member is in Pottsville Formation between Connoquenessing and Homewood Sandstone Members. Present only in PA. Contains plant flora of Zone 8 of Read and Mamay (1964).

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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