The Stansbury expedition to Utah was a huge scientific success. He was the first to determine that the lake was actually a remnant of a larger inland freshwater
pluvial lake (today called
Lake Bonneville). The method of triangulation used to map the lake was a first for the Topographical Corps, and the method was put into standard use by the Corps and later by the
US Geological Survey. The expedition collected many different species of birds, plants, lizards and mammals as well as rock samples and fossils. Several esteemed scientists of the day provided commentary in the expedition report, including
Spencer Fullerton Baird (ornithologist and ichthyologist),
Charles Frédéric Girard (ichthyologist and herpetologist),
John Torrey (botanist) and
James Hall (paleontologist). Several discovered species were heretofore unknown to science including
Uta stansburiana which was named for the expedition leader. In the late 1850s, Native American conflicts on the Oregon Trail forced the government to establish a new trail through Colorado and Wyoming known as the
Overland Trail. Between Laramie and Fort Bridger, the trail follows almost exactly the route mapped by the expedition. In the 1860s the
First transcontinental railroad also followed the path through southern Wyoming and Utah, although Stansbury had suggested that the railroad descend the
Wasatch Mountains via
Provo Canyon and cross the valley to the south of the lake rather than the actual path taken through
Weber Canyon to the north. In the 20th century two major highways also followed the route: the
Lincoln Highway and
Interstate 80. Lieutenant Gunnison wrote a book entitled
The Mormons or Latter-Day Saints, in the Valley of the Great Salt Lake: A History of Their Rise and Progress, Peculiar Doctrines, Present Condition that together with the official expedition report provided many Americans with their first in-depth look at the Mormon faith. In 1853 Gunnison returned to Utah to survey a railroad route and was killed with 7 of his men by a band of
Pah Vants. ==Namesakes==