Generalized Geologic Map of Part of the Yosemite Region, California.
1930 (dated) 11 x 19 in (27.94 x 48.26 cm)
A fine example of Francois e. Matthes' 1930 generalized geologic map of the spectacular Yosemite National Park region, California. The map covers the region from the Ten Lakes to Peregoy Meadow in and from the Aspen Valley to Mt. Florence. Throughout countless well-known Yosemite sites are noted, including Sentinel Rock, Old Inspiration Point, and eagle Peak as well as various lakes, meadows, trails, mountain passes, rivers and creeks. Formed over millions of years of interaction between glaciers and rock, this U-shaped valley still undergoes dramatic changes with constant erosion, rock slides and avalanches. The map is color coded with a detailed key on the right hand side of the map. This particular map was published as plate 51 by the United States Geological Survey in 1930 as part of the Geological History of the Yosemite Valley.
The Office of the Coast Survey (later the U.S. Geodetic Survey) (1807 - present), founded in 1807 by President Thomas Jefferson and Secretary of Commerce Albert Gallatin, is the oldest scientific organization in the U.S. Federal Government. Jefferson created the "Survey of the Coast," as it was then called, in response to a need for accurate navigational charts of the new nation's coasts and harbors. The first superintendent of the Coast Survey was Swiss immigrant and West Point mathematics professor Ferdinand Hassler. Under the direction of Hassler, from 1816 to 1843, the ideological and scientific foundations for the Coast Survey were established. Hassler, and the Coast Survey under him developed a reputation for uncompromising dedication to the principles of accuracy and excellence. Hassler lead the Coast Survey until his death in 1843, at which time Alexander Dallas Bache, a great-grandson of Benjamin Franklin, took the helm. Under the leadership A. D. Bache, the Coast Survey did most of its most important work. During his Superintendence, from 1843 to 1865, Bache was steadfast advocate of American science and navigation and in fact founded the American Academy of Sciences. Bache was succeeded by Benjamin Pierce who ran the Survey from 1867 to 1874. Pierce was in turn succeeded by Carlile Pollock Patterson who was Superintendent from 1874 to 1881. In 1878, under Patterson's superintendence, the U.S. Coast Survey was reorganized as the U.S. Coast and Geodetic Survey (C & GS or USGS) to accommodate topographic as well as nautical surveys. Today the Coast Survey is part of the National Oceanic and Atmospheric Administration or NOAA.
Matthes, F. E., Geologic History of the Yosemite Valley, (Washington, USGS) 1930.
Very good. Original fold lines visible. Blank on verso.