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Date of Award
Master of Science (MS)
Beck, Myrl E.
Burmester, Russell F.
Babcock, R. Scott (Randall Scott)
High level demagnetization isolates a single syntectonic magnetization in ten stable sites from the upper Cretaceous Winthrop and Midnight Peak Formations in the Methow-Pasayten belt of north central Washington. The mean direction of D=11.4°, 1=62.6°, Alpha95=4.7° is discordant with the expected in-situ direction. This discordance is interpreted as resulting from 1,370 km of northward transport between 93 and 45 Ma. Correcting the contemporaneous Mount Stuart direction from within the Cascade terrane for approximately 16° of southward tilt brings it into accord with the new Methow direction. Further, if northward translation of these terranes were initiated by a southward Kula-FaralIon ridge jump,the North America-Kula-FaralIon triple junction had to be located north of 35° N. by 80-94 Ma.
Methow-Pasayten Belt, Paleomagnetic evidence
Western Washington University
Subject – LCSH
Paleomagnetism--Washington (State)--Methow Valley; Geology, Stratigraphic--Cretaceous
Methow Valley (Wash.)
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.
Granirer, Julian L. (Julian Linus), "Paleomagnetic Evidence for Northward Transport of the Methow-Pasayten Belt" (1985). WWU Graduate School Collection. 683.