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

Geologic Unit: Tendoy

Usage:

Tendoy Group (MT*)


Subunits:

(alphabetical) --all in MT*: McKenzie Canyon Limestone, Middle Canyon Formation, Mission Canyon Limestone, Paine Limestone.


Geologic age:

Mississippian, Early*
Kinderhookian*
Osagean*
Mississippian, Late*
Meramecian, early*


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

Type section (composite): (1) Bull Canyon, in sec. 17, T. 11 S., R. 10 W.; and (2) on divide between Bell and McKenzie Canyons, in sec. 21, T. 11 S., R. 10 W., Tendoy Mountains, Beaverhead Co., MT. Named from exposures in Tendoy Mountains, Beaverhead Co., MT (Sando and others, 1985).


AAPG geologic province:

Montana folded belt*


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).