Publication Date

1980

Document Type

Dissertation/Thesis

First Advisor

Ervin, C. Patrick

Degree Name

M.S. (Master of Science)

Department

Department of Geology

LCSH

Geology, Stratigraphic--Precambrian||Geology--Minnesota

Abstract

Morey and Sims proposed that a major Precambrian boundary exists in Minnesota separating a greenstone- granite terrane to the north and an older, gneissic terrane to the south. Sims later re-evaluated the same data and suggested that the boundary lies further north than the previously proposed boundary. A gravity survey was conducted in west-central Minnesota along a north-south profile crossing both boundaries. The two-dimensional, Talwani gravity modeling algorithm was used to deduce a geologic model of the area to better define the boundary between the two terranes. The geologic model supports Sims' boundary but suggests that a possible "transition zone", delineated by the two proposed boundaries, exists between the two terranes.

Comments

Includes bibliographical references.||Includes maps.||Page 20 missing.

Extent

vii, 43 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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