Usage:
Hero Member of Valcour Formation of Chazy Group (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).]
Geologic age:
Late Ordovician (Whiterockian; late Chazyan)
Type section, locality, area and/or origin of name:
Type section: in South Hero, near Rutland Railway Station, Grand Isle Co., VT (Oxley and Kay, 1959).
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 ([ ]).