Usage:
Hamden limestone (informal, unranked) in Allegheny Formation (OH)
Informal. The rank or lithologic term should not be capitalized.
Geologic age:
Pennsylvanian
Type section, locality, area and/or origin of name:
Not designated. Named from its occurrence at stratigraphic horizon of Hamden iron ore of southern Vinton and northern Jackson Cos., southeastern OH (Stout, 1918).
AAPG geologic province:
Appalachian basin
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 ([ ]).