U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Alvy Creek

Usage:

/Alvy Creek formation (informal) of Breathitt Group (KY)
(†Alvy Creek not used by the VA Geol. Survey; type locality in VA. Rocks incl. in Lee Formation. See Lee.)

Informal. The rank or lithologic term should not be capitalized. [Term "Formation" is applied to formal nomenclature (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005).]


Subunits:

/FORMATION STATUS (alphabetical) --all in KY: Coal Cliff member (informal), Hensley Member.


Geologic age:

Early Pennsylvanian (Bashkirian; Westphalian A; Morrowan)


Type section, locality, area and/or origin of name:

Type locality: exposures near Alvy Creek, Big A Mountain quadrangle, VA (Chesnut, 1992).


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 ([ ]).