Title:
 Geology and stratigraphy of the Challis volcanic group and relatedrocks, Little Wood River area, south-central Idaho, with a section ongeochronology 
Reference Number:
 1982 
ISSN:
 8755-531X
Publication Year:
 2005
GeoREF Number:
 2005-046755 (View Original Data File)
Authors:
 Sanford, Richard F; Snee, Lawrence W
Descriptors:
 breccia; Cenozoic; Challis Volcanics; Eocene; Idaho; igneous rocks;lava flows; lithostratigraphy; Little Wood River valley; Paleogene;pyroclastics; south-central Idaho; Tertiary; tuff; United States;USGS; volcanic rocks; volcaniclastics
Source:
 U. S. Geological Survey Bulletin, Report: B 2064-II, 22 pp., May 2005
Abstract:
 The Challis volcanic field is the largest of several Eocene volcanicfields in the Pacific Northwest of the United States and Canada. Inthe Little Wood River area of Idaho, rock types in the Eocene ChallisVolcanic Group include andesite lava flows and tuff breccia, dacitelava flows and flow breccia, volcaniclastic sedimentary rocks, lithictuff, nonvolcanic conglomerate, and rhyolite dikes.
Notes:
 Accessed on July 6, 2005; includes appendix
Copyright:
 GeoRef, Copyright 2005, American Geological Institute.

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