Graduate Thesis Or Dissertation
 

Marine geophysical studies offshore: Newport, Oregon

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pc289m24m

Descriptions

Attribute NameValues
Creator
Abstract
  • A marine geophysical study using shallow seismic reflection, gravity and magnetic methods of investigation was done for an offshore area near Newport, Oregon. The area is bounded by the latitudes 44°1O' to 44°50' N. and longitudes 124°07' to 124°30' W. The interpretation of observational data showed that the geology of the area north of latitude 44°25' N. consists of a north-south syncline. A geological, two-dimensional model was constructed to agree with the observed gravity and geological data along an east-west cross section in the area. The model's synclinal axis was found to shift to the west with depth. Basement depths of 19,000 to 21,500 feet were given in the deepest portion of the model syncline. If regional gravity decreases to the west, the model would have to be made shallower, and the axis shift to the west would be less pronounced. Seismic data indicate complex minor folding and possible faulting in the central portion of the area of investigation (central and southern Stonewall Bank). Gravity and magnetic readings indicate a rise of the basement in the western part of the area (west of Stonewall Bank) The geology of the area south of latitude 44°25' N. was interpreted to be a large, crystalline rock mass with its upper surface at shallow depths off Cape Perpetua. Gravity and magnetic data indicate that the crystalline mass noses down to the northwest. Geological models, that were constructed in this area to agree with gravity and geological data, indicate that the mass is probably cone-shaped, and the basement of the surrounding country rock is 13,000 to 16,000 feet deep. Shallow volcanic flows may be present in this area.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details WhitcombJamesHall1965.pdf 2017-08-02 Public Download