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  • Usage in publication:
    • Little Northeast Creek Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Metavolcanics
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Higgins, M.W., 1977, Six new members of the James Run Formation, Cecil County, northeastern Maryland, IN Sohl, N.F., and Wright, W.B., Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1976: U.S. Geological Survey Bulletin, 1435-A, p. A122-A127.


Summary:

Name Little Northeast Creek Member of James Run Formation (of Glenarm Group) proposed for grayish-white to gray dacitic to rhyolitic granofels with relict phenocrysts of plagioclase and quartz exposed along Little Northeast Creek near Theodore, Cecil Co., MD. Unit is fine- to medium-grained and massive. At least four phases of folding are indicated. Of metavolcanic to metasubvolcanic origin. Thickness 1,370 m. Grades into Frenchtown Member and biotite gneiss of sedimentary origin. Probably partly equivalent to Principio Furnace Member (new). Underlies Gilpins Falls Member (new). Age is early Paleozoic.

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


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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