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Map showing publication footprint
  • Usage in publication:
    • Blacksburg schist*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Schist
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Keith, Arthur, and Sterrett, D.B., 1921, [Gaffney quadrangle, Lincoln and Cleveland Counties, North Carolina], IN Loughlin, G.F., and others, Limestones and marls of North Carolina: North Carolina Geological and Economic Survey Bulletin, no. 28, 211 p., Prepared in cooperation with USGS


Summary:

Pg. 29, 73. Blacksburg schist. A formation, 800 to 1,000 feet thick, which varies from a fine-grained graywacke (an impure variety of sandstone) to sericite schist. Overlies quartzite, conglomerate, and schist [Kings Mountain quartzite] and underlies Gaffney marble. Age is Cambrian (probably Early). [See also A. Keith, USGS Gaffney-Kings Mountain folio, no. 222, 1931.]
[Named from development in Blacksburg, Cherokee Co., northwestern SC. Extends into Gaffney quadrangle, Lincoln and Cleveland Cos., southern NC.]

Source: US geologic names lexicon (USGS Bull. 896, p. 207).


Map showing publication footprint
  • Usage in publication:
    • Blacksburg Schist*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Overstreet, W.C., and Bell, Henry, III, 1965, The crystalline rocks of South Carolina: U.S. Geological Survey Bulletin, 1183, 126 p., (incl. geologic map, scale 1:500,000), See also USGS Misc. Geol. Inv. Ser. Map I-413, 1 sheet, scale 1:250,000


Summary:

Pg. 89 (geol. time scale), 109. Blacksburg Schist. Age changed from Cambrian(?) --to-- Ordovician to Mississippian. (Authors follow revised time scale of Holmes, 1959, Edinburgh Geol. Soc. Trans., v. 17, pt. 3, p. 183-216.)

Source: Publication; Changes in stratigraphic nomenclature, 1964 (USGS Bull. 1224-A, p. A16).


Map showing publication footprint
  • Usage in publication:
    • Blacksburg Schist
  • Modifications:
    • Age modified
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Horton, J.W., Jr., and Butler, J.R., 1981, Geology and mining history of the Kings Mountain belt in the Carolinas; a summary and status report, IN Horton, J.W., Jr., Butler, J.R., and Milton, D.J., eds., Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas: Carolina Geological Society Field Trip Guidebook, October 24-25, 1981, no. 16, p. 194-212.


Summary:

Age of Blacksburg Schist shown as Late Proterozoic. Blacksburg is among list of formal rock-stratigraphic units within the Kings Mountain belt that have been avoided or used with discretion because of various problems. Quartzite which Keith and Sterrett (1931) mapped as Kings Mountain quartzite are found within rocks they mapped as Blacksburg schist as well as within those they mapped as Battleground schist and Gaffney Marble crops out at two stratigraphic levels within the Blacksburg.

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


Map showing publication footprint
  • Usage in publication:
    • Blacksburg Formation*
  • Modifications:
    • Revised
    • Redescribed
  • Dominant lithology:
    • Quartzite
    • Marble
    • Amphibolite
    • Schist
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Horton, J.W., Jr., 1984, Stratigraphic nomenclature in the Kings Mountain belt, North Carolina and South Carolina, IN Stratigraphic notes, 1983: U.S. Geological Survey Bulletin, 1537-A, p. A59-A67.


Summary:

Blacksburg Schist is redefined as Blacksburg Formation and revised to include quartzite units previously mapped as Kings Mountain Quartzite, marble, amphibolite, and calcsilicate rock interlayered with sericite schist and phyllite. Formation is fault-bounded and upper and lower contacts are unknown. Gaffney Marble is reduced to Gaffney Marble Member and assigned to Blacksburg. Informal Dixon Branch marble member may be the Gaffney repeated by faulting. Age is assumed to be Late Proterozoic(?).

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


Map showing publication footprint
  • Usage in publication:
    • Blacksburg Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rankin, D.W. (editor), Chiarenzelli, J.R., Drake, A.A., Jr., Goldsmith, Richard, Hall, L.M., Hinze, W.J., Isachsen, Y.W., Lidiak, E.G., McLelland, James, Mosher, Sharon, Ratcliffe, N.M., Secor, D.T., Jr., and Whitney, P.R., 1993, Proterozoic rocks east and southeast of the Grenville Front, IN Reed, J.C., Jr., and others, eds., Precambrian; conterminous U.S.: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. C-2, p. 335-461.


Summary:

Age of Blacksburg Formation is Late Proterozoic to Early Cambrian as shown in table 12 of report.

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 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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