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National Geologic Map Database

Geologic Unit: Lodore

Usage:

Lodore Formation (CO*,UT*,WY)
Lodore Shale (CO*.,WY*)


Geologic age:

Late Cambrian (Dresbachian)*


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

Named from Lodore Canyon [Moffat Co., northwestern CO] (Powell, 1876).
Type locality (section): Dunn's Cliff [now known as Limestone Ridge, approx. Lat. 40 deg. 36 min. N., Long. 108 deg. 56 min. W., Canyon of Lodore South 7.5-min quadrangle, Moffat Co., CO] (Kinney, 1955).


AAPG geologic province:

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