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

Geologic Unit: Chiulos

Usage:

Chiulos Member of Great Blue Formation (UT*)


Geologic age:

late Middle to Late Mississippian (late Visean to Serpukhovian; Chesterian)*


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

Type section: measured on west limb of syncline southeast of Chiulos Canyon, near Tintic Davis shaft, in S/2 SE/4 sec. 30 and N/2 NE/4 sec. 31, T. 9 S., R. 2 W., North Tintic district, Utah Co., western UT (Morris and Lovering, 1961).


AAPG geologic province:

Great Basin province*


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 ([ ]).