Usage:
Day Point Formation of Chazy Group (NY*,VT*)
Day Point Limestone of Chazy Group (NY*,VT*)
Day Point Formation (NY*,VT*)
Day Point Limestone (NY*,VT*)
[Use of Chazy as a lithostratigraphic term (Chazy Group) should be discontinued. It is more widely used as a North American provincial chronostratigraphic term (Chazyan Stage).]
Subunits:
(alphabetical): Fleury Member (NY,VT), [?]Head Member (VT), Scott Member (NY,VT), Ste. Therese Member (NY,VT?), Wait Member (VT).
Geologic age:
Middle Ordovician (Whiterockian; early Chazyan)*
Type section, locality, area and/or origin of name:
Well exposed at Day Point, Peru Twp., Clinton Co., NY (Cushing, 1905).
AAPG geologic province:
Appalachian basin*
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 ([ ]).