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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Byers Island Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Head, J.W., III, 1972, Upper Silurian-Lower Devonian stratigraphy and nomenclature in the central Appalachians, IN Guidebook for the 37th annual field conference of Pennsylvania geologists: Field Conference of Pennsylvania Geologists, no. 37, p. 96-103.


Summary:

Byers Island is here named the lowest member of Keyser Formation. Unit is characterized by its nodular beds. 93 ft thick at type locality north of Selinsgrove, PA. It can be traced from central PA southward into WV and VA. Grades laterally into the Tonoloway Limestone in PA, the Big Mountain Shale Member in WV, and then into the Clifton Forge Sandstone Member in VA. Underlies Jersey Shore Limestone Member (new). Age is Late Silurian.

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


Map showing publication footprint
  • Usage in publication:
    • Byers Island Member*
  • Modifications:
    • Overview
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Denkler, K.E., and Harris, A.G., 1988, Conodont-based determination of the Silurian-Devonian boundary in the Valley and Ridge province, northern and central Appalachians, IN Sando, W.J., ed., Shorter contributions to paleontology and stratigraphy: U.S. Geological Survey Bulletin, 1837-B, p. B1-B13.


Summary:

The Byers Island Member of the Keyser Limestone of Head (1972) is here accepted for USGS use in PA, VA, and WV. Overlies Tonoloway Limestone; underlies Jersey Shore Member of the Keyser. Age is Late Silurian.

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


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 ([ ]).