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

Geologic Unit: Copenhagen

Usage:

Copenhagen Formation (NV*)


Geologic age:

late Middle to Late Ordovician (Whiterockian to Mohawkian; Chazyan to Chatfieldian)*


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

[Principal reference section]: west side of Martin Ridge, 1 mi southeast of union of Ryegrass Canyon with Copenhagen Canyon, [Horse Heaven Mountain 15-min quadrangle, Eureka Co., Toiyabe National Forest, central Nevada] (Merriam, 1963, pl. 2, loc. 10).


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 ([ ]).