In adjoining NY part of MA State Geologic Map, used as Poultney Formation of Early and Middle Ordovician age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Used as Poultney Formation of Ordovician age. Occurs in Taconic allochthon sequence in Glens Falls quad. Overlies Late Cambrian and Early Ordovician Hatch Hill Formation; underlies Ordovician Normanskill Group of Fisher (1984).
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 ([ ]).