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Geologic Unit: Glens Falls
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Map showing publication footprint
  • Usage in publication:
    • Glens Falls limestone
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Shale
    • Conglomerate
  • AAPG geologic province:
    • New England province
    • Appalachian basin
Publication: Summary:

Named the Glens Falls limestone of the Trenton group for Glens Falls, Warren Co., eastern NY. Consists of thin layers of very fossiliferous limestone with shale intercalations near top and a 2 inch conglomerate layer at base. Contains ripple marks and other signs of shallow water conditions. Basal unit of Trenton group. Thickness is 17 feet. Overlies the Tribes Hill limestone or the Amsterdam limestone and underlies the Canajoharie shale. Fossils indicate that the Glens Falls is of Middle Ordovician age.

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

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Glens Falls limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • New England province
Publication: Summary:

Geographically extended the Glens Falls limestone to west-central VT. Consists of thin-bedded, dark blue-gray, rather coarsely granular limestone. Thickness is about 115 feet. Overlies the Orwell limestone and underlies the Hortonville shale.

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

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Glens Falls Limestone*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • New England province
Publication: Summary:

Revised the Glens Falls Limestone as part of the Chazy Group in west central VT.

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

NGMDB
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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 ([ ]).

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