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Date Permissions Signed
5-22-2018
Date of Award
Summer 1987
Document Type
Masters Thesis
Degree Name
Master of Science (MS)
Department
Geology
First Advisor
Beck, Myrl E.
Second Advisor
Danes, Z. Frank
Third Advisor
Pevear, David R.
Abstract
Gravity data were gathered in the vicinity of the Mt. Stuart Block, a horst of pre-Tertiary rocks which include the Chiwaukum Schist, the composite Mt. Stuart Batholith, and the Ingalls Complex with its related metasedimentary-volcanic sequence, located in the east central Cascade Mountains of Washington. The final complete Bouguer map suggests the following features: (1) displacement of the Chiwaukum Graben occurs mostly on the west side in a narrow, 4-5 km, block 5.5 to 7.5 km deep, expanding in width to the north; (2) the Ingalls Complex is a relatively shallow feature: certainly a model hypothesizing a deep plug of peridotite is incompatible with the gravity data; (3) there is gabbroic rock at depth, below the Mt. Stuart Batholith, which on the west side has been intruded in part by rock of the Snoqualmie Batholith; (4) there is a thickening of the Teanaway volcanic rocks south of the western part of the Mt. Stuart Block; and (5) rock of the Mt. Stuart Batholith extends to the south beyond the Ingalls Complex and forms basement for the Swauk Formation.
Type
Text
Keywords
Swauk Formation, Mount Stuart Block, Gravity data
DOI
https://doi.org/10.25710/mn20-pv83
Publisher
Western Washington University
OCLC Number
1059936631
Subject – LCSH
Gravity anomalies--Washington (State)-Stuart, Mount (Chelan County); Geology--Washington (State)-Stuart, Mount (Chelan County);
Geographic Coverage
Stuart, Mount (Chelan County, 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
Petrie, Gregg M., "A Gravity Survey and Analysis of the Mount Stuart Block of Washington State" (1987). WWU Graduate School Collection. 783.
https://cedar.wwu.edu/wwuet/783
Comments
Page 11 was not included in the original publication and is not included in this file.