Usage:
Chipman Formation (VT*)
Subunits:
(alphabetical) --all in VT*: Beldens Member, Bridport Member, Burchards Member, Weybridge Member.
Geologic age:
Middle Ordovician (Whiterockian; Arenig to Llanvirn)*
Type section, locality, area and/or origin of name:
Named from Chipman Hill in outcrop belt north of Middlebury Village, Addison Co., west-central VT (Kay and Cady, 1947).
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 ([ ]).