U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Pound
Search archives
Map showing publication footprint
  • Usage in publication:
    • Pound Sandstone Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Conglomerate
  • AAPG geologic province:
    • Appalachian basin
Publication:

Dennison, J.M., 1970, Stratigraphic divisions of Upper Devonian Greenland Gap Group ("Chemung Formation") along Allegheny Front in West Virginia, Maryland, and Highland County, Virginia: Southeastern Geology, v. 12, no. 1, p. 53-82.


Summary:

Pound Sandstone Member here named for stream 3.2 km from type section near Judy Gap and assigned to newly named Foreknobs Formation (Greenland Gap Group). Unit consists fine-to medium-grained, cross-bedded sandstone with some conglomeratic layers; weathers light olive gray with some siltstone partings. Interpreted as barrier deposit sandstone, produced by waves winnowing finer sediments. Underlies unnamed member of Foreknobs; overlies Blizzard Member of Foreknobs. 116 ft (35 m) thick at type. Thickness ranges from 23 ft (7 m) at LaVale to 193 ft (59 m) at Mouth of Seneca. Age is Late Devonian.

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


Map showing publication footprint
  • Usage in publication:
    • Pound Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Boswell, R.M., Donaldson, A.C., and Lewis, J.S., 1987, Subsurface stratigraphy of the Upper Devonian and Lower Mississippian of northern West Virginia: Southeastern Geology, v. 28, no. 2, p. 105-131.


Summary:

Uppermost members of Foreknobs Formation, Pound and Red Lick, are retained as members of the Greenland Gap Formation in the subsurface of WV, west of the Allegheny Front. Foreknobs and Scherr Formations are not recognized in study area, hence Greenland Gap is extended to this area at formation rank and replaces use of term "Chemung."

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


Map showing publication footprint
  • Usage in publication:
    • Pound Member
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Warne, A.G., and McGhee, G.R., Jr., 1991, Stratigraphic subdivisions of the Upper Devonian Scherr, Foreknobs, and Lock Haven Formations near the Allegheny Front of central Pennsylvania: Northeastern Geology, v. 13, no. 2, p. 96-109.


Summary:

In south-central PA, the Minnehaha Springs Member of the Scherr Formation and the Mallow, Briery Gap, Blizzard, Pound, and Red Lick Members of the Foreknobs Formation of the Greenland Gap Group are recognized. Pound Member is composed of gray, fine- to medium-grained, cross-bedded sandstone with minor siltstone, shale, and conglomerate. Commonly contains SPINATRYPA SPINOSA, SPINATRYPA HYSTRIX, "CAMAROTOECHIA" sp., CYRTOSPIRIFER CHEMUNGENSIS, and CYRTOSPIRIFER INERMIS. Fossils indicate high energy, near-shore environments. Coarse-grained, trough cross-bedded, hummocky cross-stratified sandstones indicate deposition in delta front and shallow shelf environments reworked by waves and currents.

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


Map showing publication footprint
  • Usage in publication:
    • Pound Sandstone Member
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Dennison, J.M., Filer, J.K., and Rossbach, T.J., 1994, Upper Devonian outcrop stratigraphy along the Appalachian basin margin in southeastern West Virginia and southwestern Virginia and implications for hydrocarbon exploration, IN Schultz, A.P., and Rader, E.K., eds., Studies in eastern energy and the environment: Virginia Division of Mineral Resources Publication, no. 132, p. 43-49., See also 1994 AAPG Eastern Section Spec. Vol. (Williamsburg, VA, Sept. 19-21, 1993)


Summary:

The term Foreknobs Formation is not used in the stratigraphic cross section south of Gap Mills, WV. Arbitrary cutoffs are drawn where diagnostic characteristics are lost by facies change. The Mallow Member coarsens upward and also becomes finer grained toward the southwest. Cutoffs of the base of the Mallow Member are drawn between Alleghany and White Sulphur Springs. All sandstone in the Mallow, Briery Gap, Blizzard, and Pound Members is lost southwest of White Sulphur Springs resulting in an arbitrary cutoff of the base of the Foreknobs, which jumps up to the base of the Red Lick Member near Gap Mills. The Red Lick then loses all of its sandstone between Gap Mills and Bluefield.

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


Search archives

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 ([ ]).