Excerpt from A Geologic Reconnaissance for Phosphate and Coal in Southeastern Idaho and Western WyomingThe first geologic and topographic examination in the area con M in this report was made in 1872, when the Snake River division of the Hayden Survey traversed the country from Ogden, utih, to Fort Hall, Idaho, thence went up Snake River and the valley (f Henrys Fork to its head, where an examination of the lakes, gems, and headwaters of the F...
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