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Island Park, Idaho; Transition from rhyolites of the Yellowstone Plateau to basalts of the Snake River Plain

By
Robert L. Christiansen
Robert L. Christiansen
U.S. Geological Survey
,
345 Middlefield Road, Menlo Park, California 94025
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Glenn F. Embree
Glenn F. Embree
Ricks College
,
Rexburg, Idaho 83440
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Published:
January 01, 1987

Abstract

Island Park, situated between the northeastern end of the Snake River Plain and the western margin of the Yellowstone Plateau, is traversed by U.S. 20-191 between Ashton, Idaho, and West Yellowstone, Montana (Fig. 1) and, in part, by the Mesa Falls Road (Idaho 47). All of the physiographic and geologic features described in this guide can be reached during the summer months by passenger car on those two paved highways or on short gravel roads that extend from them. During the winter, U.S. 20-191 remains open, but other winter travel is possible only by skis or skimobile. One quarry locality described later is privately owned but has generally been freely accessible.

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Contents

DNAG, Centennial Field Guides

Rocky Mountain Section of the Geological Society of America

Stanley S. Beus
Stanley S. Beus
Department of Geology Northern Arizona University Flagstaff, Arizona 86001
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Geological Society of America
Volume
2
ISBN electronic:
9780813754086
Publication date:
January 01, 1987

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