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National Geologic Map Database

Geologic Unit: Day Point

Usage:

Day Point Formation of [†]Chazy Group (NY*,VT*)
Day Point Limestone of [†]Chazy Group (NY*,VT*)
Day Point Limestone (NY*)

[In recent years †Chazy has been abandoned as a lithostratigraphic term, and has been used as a provincial chronostratigraphic term (Chazyan Stage). To prevent confusion, the use of Chazy as a lithostratigraphic term should be avoided.]


Subunits:

Fleury Member (NY,VT), Head Member (VT), [?]Ste. Therese Member (NY,VT), Wait Member (VT).


Geologic age:

Middle Ordovician (Whiterockian)*


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 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 ([ ]).