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Geologic Unit: Harlan
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Map showing publication footprint
  • Usage in publication:
    • Harlan sandstone*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Shale
    • Coal
  • AAPG geologic province:
    • Appalachian basin
Publication:

Campbell, M.R., 1893, Geology of the Big Stone Gap coal field: U.S. Geological Survey Bulletin, 111, 106 p.


Summary:

Named as topmost formation in Coal Measures in Bigstone Gap coal field of VA and KY. Named for Harlan Co., southeastern KY. Consists of mainly white, coarse sandstone with sandy shale and thin coals; includes massive sandstone at base is 100 ft thick. Thickness is 880 ft. Overlies Wise formation. [Age is Pennsylvanian.]

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


Map showing publication footprint
  • Usage in publication:
    • Harlan sandstone, formation
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Wanless, H.R., 1946, Pennsylvanian geology of a part of the southern Appalachian coal field: Geological Society of America Memoir, 13, 162 p.


Summary:

Harlan sandstone (or formation) is uppermost division of Pennsylvanian in Black Mountains, Harlan and Letcher Cos., KY, and Wise and Lee Cos., VA. Overlies Wise formation. Includes massive cliff-forming conglomeratic sandstone at base (probably Campbell's original Harlan sandstone). Base commonly stated to be 5 to 50 ft above High Splint coal. Although it contains shales and coals, the formation has commonly been called Harlan sandstone. May be lower Allegheny in age.

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


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

Nolde, J.E., 1994, Devonian to Pennsylvanian stratigraphy and coal beds of the Appalachian plateaus province, IN Geology and mineral resources of the southwest Virginia coalfield: Virginia Division of Mineral Resources Publication, no. 131, p. 1-85.


Summary:

Harlan Formation occurs in the extreme western portion of Wise Co. near the VA-KY boundary. It crops out along the upper slopes of Little Black Mountain, Road, Bluff, and Ninemile spurs in the Appalachia quad. and along Rogers Ridge in the Flat Gap quad. Unit has a maximum preserved thickness of 600 ft. Consists primarily of light- to medium-gray, fine- to medium-grained sandstone with some interbedded medium-gray shale and siltstone. Includes as many as 6 or 7 coal beds. Age shown as Middle Pennsylvanian.

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


Map showing publication footprint
  • Usage in publication:
    • Harlan Formation*, Sandstone*
  • 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:

Harlan Formation (or Sandstone) is uppermost Pennsylvanian formation in VA. Used in VA and KY. Equivalent to the uppermost part of Breathitt Formation in KY.

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 ([ ]).