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Map showing publication footprint
  • Usage in publication:
    • Millingport Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Siltstone
    • Argillite
  • 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:

Millingport Formation of Albemarle Group named in Stanly Co., central NC. Unit is divided into Floyd Church Member and overlying Yadkin Member (reduced in rank). Rocks formerly assigned to Yadkin Graywacke and McManus Formation (in part), now abandoned. Consists of sandstone, siltstone, argillite, and minor pyroclastic rocks. Ranges in thickness from 1800 m to 2700 m. Conformably overlies Cid Formation of Albemarle Group; interbedded with Uwharrie Formation. Age is Ordovician(?).

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


Map showing publication footprint
  • Usage in publication:
    • Millingport Formation*
  • 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 Millingport Formation changed from Ordovician(?) to Cambrian.

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


Map showing publication footprint
  • Usage in publication:
    • Millingport Formation*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rankin, D.W., Stern, T.W., McLelland, James, Zartman, R.E., and Odom, A.L., 1983, Correlation chart for Precambrian rocks of the Eastern United States, IN Harrison, J.E., and Peterman, Z.E., eds., Correlation of Precambrian rocks of the United States and Mexico: U.S. Geological Survey Professional Paper, 1241-E, p. E1-E18.


Summary:

Rb-Sr age of 540+/-7 m.y. obtained on andesitic tuff in the Floyd Church Member of the Millingport Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Millingport Formation†
  • Modifications:
    • Abandoned
  • 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:

Millingport Formation abandoned. Albemarle Group now includes (ascending): Tillery Formation, Cid Formation with its lower unnamed mudstone member and upper Flat Swamp Member, Floyd Church Formation, and Yadkin Formation, both raised in rank from members of Millingport.

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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