Sponsor
Portland State University. Department of Earth Sciences
First Advisor
Michael L. Cummings
Date of Publication
1982
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Geology
Department
Earth Science
Language
English
Subjects
Areal Geology, Volcanology, Oregon, Hydrothermal Alteration
DOI
10.15760/etd.3147
Physical Description
1 online resource (137 p.)
Abstract
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 obsidian flows. The youngest unit, an obsidian, has been dated at 4.9 m.y. East of Little Glass Butte lie two northwest-trending ridges, Antelope and Cascade Ridges, composed of two or more overlapping exogenous domes that formed along northwest-trending faults.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
http://archives.pdx.edu/ds/psu/18287
Recommended Citation
Berri, Dulcy Annette, "Geology and hydrothermal alteration, Glass Buttes, Southeast Oregon" (1982). Dissertations and Theses. Paper 3158.
https://doi.org/10.15760/etd.3147
Plate I. Outcrop Geologic Map, Eastern Glass Buttes, Oregon
berri_dulcy_a-1982_plate_two.pdf (10038 kB)
Plate II. Geologic Crossections, Eastern Glass Buttes
Comments
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This thesis includes supplemental content.