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National Geologic Map Database
Geologic Unit: Joshua
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Map showing publication footprint
  • Usage in publication:
    • Joshua schist
  • Modifications:
    • Named
  • Dominant lithology:
    • Schist
    • Phyllite
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Brown, W.R., 1953, Structural framework and mineral resources of the Virginia Piedmont, IN McGrain, P., ed., Proceedings of the southeastern mineral symposium, 1950: Kentucky Geological Survey Special Publication, 9th series, no. 1, p. 88-111.


Summary:

Joshua schist named as part of Evington group (new). Probably named for Joshua Creek, 6.5 mi east of Lynchburg, Lynchburg quad, Campbell Co., south-central VA. Consists of blue-gray phyllite and fine-grained schists. Biotite porphyroblasts common. Calcareous in part. Thickness from a fraction of a foot to 500 ft. Overlies Candler formation (new), underlies Arch marble (new), both of Evington group. Age is Paleozoic(?).

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


Map showing publication footprint
  • Usage in publication:
    • Joshua schist
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Espenshade, G.H., 1954, Geology and mineral deposits of the James River-Roanoke River manganese district, Virginia: U.S. Geological Survey Bulletin, 1008, 155 p.


Summary:

Joshua schist not used. Rocks are included in Archer Creek formation (new).

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


Map showing publication footprint
  • Usage in publication:
    • Joshua schist
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Brown, W.R., 1958, Geology and mineral resources of the Lynchburg quadrangle, Virginia: Virginia Division of Mineral Resources Bulletin, no. 74, 99 p.


Summary:

Age shown in columnar section is early Paleozoic(?).

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


Map showing publication footprint
  • Usage in publication:
    • Joshua schist
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Milici, R.C. (compiler), Spiker, C.T., Jr. (compiler), and Wilson, J.M. (compiler), 1963, Geologic map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000


Summary:

Joshua schist included in Evington group (mapped undivided). Age is Paleozoic.

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


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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