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Date Permissions Signed
Date of Award
Master of Science (MS)
Brown, Edwin H.
Pevear, David R.
Suczek, Christopher A., 1942-2014
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.
Ophiolite, Stratigraphy, Petrology
Western Washington University
Subject – LCSH
Geology--Washington (State)--Fidalgo Island
Fidalgo Island (Wash.)
Copying of this thesis 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.
Gusey, Daryl, "The Geology of Southwestern Fidalgo Island" (1978). WWU Graduate School Collection. 831.