Advisor

Marvin H. Beeson

Date of Award

1980

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geology

Department

Earth Science

Physical Description

1 online resource (77 p.)

Subjects

Basalt -- Oregon -- Chehalem Mountains, Geology -- Oregon -- Chehalem Mountains, Stratigraphic geology

DOI

10.15760/etd.3191

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.

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 available to download.

Persistent Identifier

http://archives.pdx.edu/ds/psu/18439

al-eisa1.pdf (6302 kB)
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

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