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

Geologic Unit: Iditarod

Usage:

Iditarod Volcanics (AK*)


Geologic age:

Late Cretaceous to early Tertiary*


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

Best and typically exposed in wide tract northeast of Montana Creek, in vicinity of DeCourcy Mountain. Also well exposed on eastern slopes of Russian Mountains. Named from Iditarod River, central Kuskokwim region, southwestern AK (Cady and others, 1955).


AAPG geologic province:

Alaska West-Central region*
Alaska Southwestern region*


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 ([ ]).