Fine large format map of southwestern Colorado, the San Juans and contiguous parts of Utah, Arizona and New Mexico, as surveyed in 1874 and 1875 by the Hayden Survey.
The map extends from Fort Lewis (Durango) in the east to Mt. Sneffels, San Miguel (Telluride) and the Mesa Verde (Colorado) and Navajo lands in northeastern Arizona.
The topographical details in the Mesa Verde area are quite exceptional.
Many early (and now largely abandoned) mining towns are shown in the San Juan region, reflecting the locations of the earliest mining boom towns in the region.
After the American Civil War Ferdinand Vandeveer Hayden led geographic and geologic surveys of the Nebraska and Western Territories for the United States Government. In 1867 he was appointed geologist-in-charge of the United States Geological and Geographical Survey of the Territories.
Hayden organized and led previous expeditions into the Rocky Mountains, both before and after the Civil War. In 1869, he led an expedition along the Front Range to Denver and Sante Fe. In 1870 he received a $25,000 governmental grant to lead a 20-man expedition to South Pass, Fort Bridger, Henry's Fork, and back to Cheyenne.
In 1871, Hayden led a geological survey into the Yellowstone region of northwestern Wyoming. The survey consisted of some 50 men which included notables such as Thomas Moran, painter, and famous frontier/Civil War photographer William Henry Jackson. The following year, Hayden and his work Preliminary Report of the United States Geological Survey of Montana and Portions of Adjacent Territories; Being a Fifth Annual Report of Progress, was instrumental in convincing Congress to establish Yellowstone as the first U.S. National Park, aided by Jackson's stunning large-format photographs and Moran's dramatic paintings. These publications also encouraged the westward expansion of the United States.
From his twelve years of labor and annual survey journeys there resulted a most valuable series of volumes in all branches of natural history and economic science; and he issued, in 1877, his Geological and Geographical Atlas of Colorado. The last of the annual survey journeys was in 1878. As a result of Hayden's extensive geological work, he uncovered numerous dinosaur fossils which he brought back east with him for further scientific study. Much of what he brought back is still housed in the collection of the Smithsonian Institution.