Advisor

Robert O. Van Atta

Date of Award

5-26-1977

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geology

Department

Earth Science

Physical Description

1 online resource. Digitized typescript, Illustrations, maps.

Subjects

Silt -- Oregon -- Tualatin Mountain region, Petrology -- Oregon

DOI

10.15760/etd.2452

Abstract

Topics in geology, which inevitably excite professional discussion and even tempered debate, often present challenging targets for the exploratory jabs of Master's degree candidates. The Portland Hills Silt and the controversy concerning its genesis provides just such an object.

Although the physical descriptions of the silt are generally in agreement, they remain somewhat generalized and, at present, no single definition is generally accepted. Moreover, incongruities concerning structural and textural details--notably, the presence of minor stratification and/or scattered pebbles in the silt--have resulted in considerable disagreement regarding its mode of origin.

Description

Figures 31-35 are located at the end of thesis. Map listed as in pocket now an additional file.

Persistent Identifier

http://archives.pdx.edu/ds/psu/15873

Plate 1_Surficial Geology of the Tualatin Mountain Region, Oregon.pdf (12258 kB)
Surficial Geology of the Tualatin Mountain Region, Oregon

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