Publication Date

1971

Document Type

Dissertation/Thesis

First Advisor

Rubel, Daniel N.||Frost, Stanley H., 1939-||Goldich, Samuel S., 1909-

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Geology

LCSH

Petrology--Montana

Abstract

Iron Mountain is located in the west-central part of the Independence area which lies just north of the northeast corner of Yellowstone National Park. Petrographic studies show that the lava flows of Iron Mountain are trachybasalts. Mineralogical variations indicate that the trachybasalts consist of separate flows. These can be divided into two distinct groups; one which is plagioclase rich, and the other which is olivine and pyroxene rich. The trachybasalts flows may have originated by: 1) the tapping and eruption of different portions of a differentiated magma chamber from a single vent, or 2) the eruption of a differentiated magma chamber that was tapped by several separate conduits.

Comments

Includes bibliographical references.||Includes illustrations and maps.

Extent

35 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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