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National Geologic Map Database

Geologic Unit: Selby

Usage:

Selby Formation (NY,VT?)
Selby Limestone (NY*)
Selby Limestone of Black River Group (NY)
Selby Member of Chaumont Formation (NY)
Selby Member of Rockland Formation (NY)


Subunits:

Hounsfield Metabentonite [Bed] (NY).


Geologic age:

Middle Ordovician*


Type section, locality, area and/or origin of name: (See Canadian Lexicon)

Type section: along Selby Creek, 1 mi north of Napanee Station, in Lot 22, Conc. III, Richmond Twp., Lennox and Addington Cos., southern Ontario, Canada (Kay, 1937).


AAPG geologic province:

Appalachian basin*


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 ([ ]).