Geology and hydrothermal alteration, Glass Buttes, Southeast Oregon
The Glass Buttes volcanic complex consists of many domes and individual vents that erupted both rhyolitic and basaltic lavas during the late Miocene to early Pliocene. The east half of the complex, in the vicinity of Little Glass Butte, contains interfingering, finely flow-banded rhyolite and black...
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PDXScholar
1982
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| Online Access: | https://pdxscholar.library.pdx.edu/open_access_etds/3158 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=4164&context=open_access_etds |