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National Geologic Map Database

Geologic Unit: Beech

Usage:

Beech 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: Along Beech Bay, South Hero, 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 ([ ]).