Advisor

Michael L. Cummings

Date of Award

1982

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geology

Department

Earth Science

Physical Description

1 online resource (137 p.)

Subjects

Areal Geology, Volcanology, Oregon, Hydrothermal Alteration

DOI

10.15760/etd.3147

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.

Description

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL

This thesis includes supplemental content.

Persistent Identifier

http://archives.pdx.edu/ds/psu/18287

plate1_outcrop-geologic-map-small.pdf (1520 kB)
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

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