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Geological Survey 12th Annual Report (Part I)
The Eruptive Rocks of Electric Peak and Sepulchre Mountain, Yellowstone National Park |
THE ERUPTIVE ROCKS OF ELECTRIC PEAK AND SEPULCHRE MOUNTAIN, YELLOWSTONE NATIONAL PARK
By
Joseph Paxson Iddings
extract from
GEOLOGICAL SURVEY 12th ANNUAL REPORT
1890-91
rpt/12-1/index.htm
Last Updated: 22-Jun-2009