Portland State University. Department of Earth Sciences
Ansel G. Johnson
Term of Graduation
Date of Publication
Master of Science (M.S.) in Geology
Geophysical surveys -- Oregon -- Portland Metropolitan Area, Stratigraphic geology
1 online resource (3, viii, 106 pages)
The geologic setting of the Portland Basin is ideal for gravity surveys because of the large density contrasts between geologic units. The Portland Basin consists of a north-northwest-trending syncline in the Columbia River basalt overlain by Pliocene to Recent alluvium. This study was undertaken to define structures in the Portland Basin which are obscured by the alluvium.
An areal gravity survey of the Portland Basin covering approximately 450 square kilometers was conducted for this study.
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Perttu, Janice C., "An Analysis of Gravity Surveys in the Portland Basin, Oregon" (1980). Dissertations and Theses. Paper 3199.