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National Geologic Map Database
Geologic Unit: Stacy
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Map showing publication footprint
  • Usage in publication:
    • Stacy dolomite member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Butts, Charles, 1918, Geologic section of Blair and Huntingdon Counties, central Pennsylvania: American Journal of Science, 4th series, v. 46, p. 523-537.


Summary:

Named the Stacy dolomite member of the Gatesburg formation for Stacy Hill near Williamsburg, Blair Co., central PA. Unit is basal member of formation. Consists of coarse, thick-bedded, steely blue limestone without quartzite. Overlies Warrior limestone. Thickness is 500 feet. The Stacy is of Late Cambrian age.

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


Map showing publication footprint
  • Usage in publication:
    • Stacy dolomite member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Wilson, J.L., 1952, Upper Cambrian stratigraphy in the central Appalachians: Geological Society of America Bulletin, v. 63, no. 3, p. 275-322.


Summary:

The Stacy dolomite member of the Gatesburg formation in the Everett quad. consists of about 130 feet of alternating dark crystalline massive dolomite and less resistant thin-bedded lighter dolomite. Separated from overlying Ore Hill dolomite member by a 400-foot interval referred to as lower sandy Gatesburg member; separated from underlying Warrior limestone by 50 feet of covered strata.

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


Map showing publication footprint
  • Usage in publication:
    • Stacy Member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Berg, T.M. (compiler), 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey State Map, 4th series, 1, scale 1:250,000


Summary:

The Stacy Member of the Gatesburg Formation in central PA consists of thick-bedded crystalline dolomite. Unit is lowest member of formation. Overlies Warrior Formation and underlies "lower sandstone" member.

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).