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Joints, fissures, and voids in rhyolite welded ash-flow tuff at Teton damsite, Idaho

Open-File Report 77-211

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Abstract

Several kinds of joints, fissures, and voids are present in densely welded rhyolite ash-flow tuff at Teton damsite. Older fissures and voids probably were formed in the ash-flow sheet during secondary flowage, which probably was caused by differential compaction or settling over irregular topography. The younger, more abundant fissures are mostly steep cooling joints that probably have been opened farther by horizontal tectonic extension and gravitational creep, perhaps aided by lateral stress relief.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Joints, fissures, and voids in rhyolite welded ash-flow tuff at Teton damsite, Idaho
Series title:
Open-File Report
Series number:
77-211
Edition:
-
Year Published:
1977
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
14 leaves :ill. ;27 cm.; (15 p. - PGS)