page_title: Geological Exploration of the Fortieth Parallel
hierarchical_section_title: Geological Exploration of the Fortieth Parallel
caption_attribution_description: View of Shoshone Canyon and Falls — in the Idaho Territory, in 1868. Showing members of the King Survey, Geological Exploration of the 40th Parallel expedition, atop the rocks. By Timothy O'Sullivan, 1868. 77-KS-4412.
context_page_description: The Geological Exploration of the Fortieth Parallel was a geological survey made by order of the Secretary of War according to acts of Congress of March 2, 1867, and March 3, 1869, under the direction of Brig. and Bvt. Major General A. A. Humphreys, Chief of Engineers, by Clarence King, U. S. geologist. More commonly known as the Fortieth Parallel Survey, the survey conducted field work from 1867 to 1872, exploring the area along the fortieth parallel north from northeastern California, through Nevada, to eastern Wyoming.
context_section_description: The Geological Exploration of the Fortieth Parallel was a geological survey made by order of the Secretary of War according to acts of Congress of March 2, 1867, and March 3, 1869, under the direction of Brig. and Bvt. Major General A. A. Humphreys, Chief of Engineers, by Clarence King, U. S. geologist. More commonly known as the Fortieth Parallel Survey, the survey conducted field work from 1867 to 1872, exploring the area along the fortieth parallel north from northeastern California, through Nevada, to eastern Wyoming.
caption: A member of Clarence King's Geological Exploration of the 40th Parallel surveying from a rock. Shoshone Canyon and Falls, Idaho Territory, in background. By Timothy H. O'Sullivan, 1868[1]
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