The Geological Exploration of the 40th Parallel, or the King Survey, was organized in the spring of 1867. Among the men hired to accompany the expedition was Timothy O’Sullivan as photographer. The Survey’s purpose was to examine the geology, topography and natural resources of the territory around the 40th parallel between the Rocky Mountains and the Sierra Nevada.
The original caption for this photograph, taken during the survey, reads: A member of Clarence King’s Geological Exploration of the 40th Parallel is surveying from a rock. Shoshone Canyon and Falls, Idaho Terr., in back- ground. By O’Sullivan
This document was identified by teachers in our 2015 Primarily Teaching online workshop.
