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National Geologic Map Database

Geologic Unit: Chana

Usage:

Chana Member of Pecatonica Formation of Platteville Group (IL)


Geologic age:

Late Ordovician (Mohawkian; Turinian)


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

Type section: in ravine 9 mi west of Chana, in W/2 SE/4 NE/4 NE/4 sec. 24, T. 23 N., R. 9 E., Ogle Co., northern IL (Templeton and Willman, 1963).


AAPG geologic province:

Wisconsin arch


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 ([ ]).