Usage:
Hutchinson River Group (NY*,CT*)
Subunits:
Hartland Formation (NY*,CT*), and its Pelham Bay Member (NY*), Harrison Gneiss (NY*, CT*)
Geologic age:
Cambrian, Early*
Cambrian, Middle*
Cambrian, Late*
Ordovician, Early*
Ordovician, Middle*
Type section, locality, area and/or origin of name:
Type area: terrane traversed by the Hutchinson River, which flows from Scarsdale, Westchester Co., to Eastchester Bay, Bronx Co., NY (Baskerville, 1982).
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 ([ ]).