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Map showing publication footprint
  • Usage in publication:
    • Flat Swamp Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Tuff
    • Breccia
    • Volcanics
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Stromquist, A.A., and Sundelius, H.L., 1969, Stratigraphy of the Albemarle Group of the Carolina slate belt in central North Carolina, IN Contributions to stratigraphy, 1968: U.S. Geological Survey Bulletin, 1274-B, 22 p.


Summary:

Flat Swamp Member at the top of the Cid Formation named in central NC. Consists of volcanic breccias and welded tuffs. Thickness 1200 m. Conformably overlies informal mudstone member of Cid Formation and underlies Floyd Church Member of Millingport Formation. Age is Ordovician(?). [Though not stated in publication, unit may be the same, at least in part, as the Flat Swamp Mountain sequence of Stromquist and Conley (1959) and Conley (1962).]

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


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

Stromquist, A.A., and Sundelius, H.W., 1975, Interpretative geologic map of the bedrock, showing radioactivity, and aeromagnetic map of the Salisbury, Southmont, Rockwell, and Gold Hill quadrangles, Rowan and Davidson Counties, central North Carolina: U.S. Geological Survey Miscellaneous Investigations Series Map, I-888, 2 sheets, scale 1:48,000


Summary:

Age of unit changed from Ordovician(?) to Cambrian.

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


Map showing publication footprint
  • Usage in publication:
    • Flat Swamp Member
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Milton, D.J., 1984, Revision of the Albemarle Group, North Carolina, IN Stratigraphic notes, 1983: U.S. Geological Survey Bulletin, 1537-A, p. A69-A72.


Summary:

Age of the Albemarle Group and all of its formations (Tillery, Cid, Floyd Church, and Yadkin) changed to latest Proterozoic, on the basis of the fossil PTERIDINIUM, diagnostic of Vendian-Ediacaran fauna, identified from the middle or upper Floyd Church Formation. This had previously been misidentified as a Cambrian trilobite. A U/Pb concordia-intercept date of 586+/-10 Ma for zircons in the upper Uwharrie Formation sets a maximum age limit for the Albemarle.

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


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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 ( ).

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