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Date Permissions Signed
5-20-2018
Date of Award
Summer 1978
Document Type
Masters Thesis
Degree Name
Master of Science (MS)
Department
Geology
First Advisor
Brown, Edwin H.
Second Advisor
Pevear, David R.
Third Advisor
Suczek, Christopher A., 1942-2014
Abstract
Detailed geologic mapping of rocks in the upper stratigraphic levels of the Fidalgo ophiolite Indicates that keratophyres and spilites are interbedded with tuffaceous sediments, sedimentary breccias, and graywacke. Sedimentary breccias containing plutonlc rock fragments as well as volcanic rock fragments are common. The graywackes were derived from a volcanic source area. Radiolaria In the tuffaceous sediments indicate a depositional age of Lower Kimmeridgian to Upper Valanginian.
Compared to the stratigraphy and petrology of other ophiolites and present-day tectonic environments, the Fidalgo Complex most closely resembles that of ancient and modern island-arc sequences.
Type
Text
Keywords
Ophiolite, Stratigraphy, Petrology
Publisher
Western Washington University
OCLC Number
1082523699
Subject – LCSH
Geology--Washington (State)--Fidalgo Island
Geographic Coverage
Fidalgo Island (Wash.)
Format
application/pdf
Genre/Form
masters theses
Language
English
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Recommended Citation
Gusey, Daryl, "The Geology of Southwestern Fidalgo Island" (1978). WWU Graduate School Collection. 831.
https://cedar.wwu.edu/wwuet/831
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