 On January 19, 1871 one of those speeches in Washington, D.C. was attended by geologist Ferdinand Vandeveer Hayden, who became inspired to conduct his next geological survey in the Yellowstone region.The result was the Hayden Geological Survey of 1871.Summarized from Langford (1871), Doane (1871) and Chittenden (1895)



As documented by Aubrey L. Haines in "Yellowstone Place Names" (1996).