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Date Permissions Signed

2-16-2018

Date of Award

Fall 1985

Document Type

Masters Thesis

Degree Name

Master of Science (MS)

Department

Geology

First Advisor

Beck, Myrl E.

Second Advisor

Burmester, Russell F.

Third Advisor

Babcock, R. Scott (Randall Scott)

Abstract

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.

Type

Text

Keywords

Methow-Pasayten Belt, Paleomagnetic evidence

DOI

https://doi.org/10.25710/c616-c320

Publisher

Western Washington University

OCLC Number

1035957423

Comments

This thesis was printed with inconsistent page numbers. There are double pages 23, 39, 91, and 133. There are no pages 25,34, and 37.

Subject – LCSH

Paleomagnetism--Washington (State)--Methow Valley; Geology, Stratigraphic--Cretaceous

Geographic Coverage

Methow Valley (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.

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