Sponsor
Portland State University. Department of Earth Sciences
First Advisor
Marvin H. Beeson
Date of Publication
1980
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Geology
Department
Earth Science
Language
English
Subjects
Basalt -- Oregon -- Chehalem Mountains, Geology -- Oregon -- Chehalem Mountains, Stratigraphic geology
DOI
10.15760/etd.3191
Physical Description
1 online resource (77 p.)
Abstract
The Chehalem Mountains area, encompassing 70 square kilometers, is at the western extent of the Columbia River Basalt Group as mapped in western Oregon. The flows in the study area were identified as belonging to subdivisions of the Columbia River Basalt Group on the basis of physical characteristics and trace element geochemistry. The basalt flows are poorly exposed in the area and weathering is deep and extensive where the flows have been exposed. Where erosion has exposed the underlying marine sedimentary rocks, the basalt has failed in landslides.
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/18439
Recommended Citation
Al-Eisa, Abdul-Rahman Mohammed, "The structure and stratigraphy of the Columbia River basalt in the Chehalem Mountains, Oregon" (1980). Dissertations and Theses. Paper 3200.
https://doi.org/10.15760/etd.3191
Geologic Map
al-eisa2.pdf (4618 kB)
Geologic Section C-C
al-eisa3.pdf (5946 kB)
Geologic Sections A-A and B-B
al-eisa4.pdf (4834 kB)
Geologic Sections D-D and E-E
Comments
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This thesis includes supplemental content available to download.