Usage:
Walloomsac Formation (CT*,MA*,NY*,VT*)
Walloomsac Schist (CT*)
Walloomsac Slate (NY*)
Geologic age:
Late Ordovician (Caradocian; Mohawkian to Cincinnatian; Trentonian to Edenian)*
Type section, locality, area and/or origin of name:
Exposures in Walloomsac River Valley, west and northwest of Bennington, VT, in both Bennington Co., VT, and Rensselaer Co., NY (Prindle and Knopf, 1932).
AAPG geologic province:
New England province*
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 ([ ]).