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National Geologic Map Database

Geologic Unit: La Plata

Usage:

No current usage.
(†La Plata Group, †La Plata Formation, or †La Plata Sandstone (CO,NM,UT) abandoned and replaced with Morrison Formation and Entrada Sandstone. See Morrison and Entrada.)


Geologic age:

Late Jurassic


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

Named from extensive development in La Plata Mountains, La Plata Co., CO (Cross and Purington, 1898).


AAPG geologic province:

San Juan 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 ([ ]).