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Geologic Unit: Myrtle
Map showing publication footprint
  • Usage in publication:
    • Myrtle Group*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Oregon-Washington Coast Ranges province
Publication:

Coleman, R.G., 1972, The Colebrooke Schist of southwestern Oregon and its relation to the tectonic evolution of the region: U.S. Geological Survey Bulletin, 1339, 61 p.


Summary:

Humbug Mountain Conglomerate assigned to Myrtle Group. Present in southwestern Oregon. Age of group is Late Jurassic and Early Cretaceous.

Source: Changes in stratigraphic nomenclature, 1972 (USGS Bull. 1394-A, p. A32-A33).


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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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