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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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The petroleum fields of the Pacific coast of Alaska, with an account of the Bering River coal deposits
This report contains the result of a hasty examination of the structural and economic geology of the localities where indications of petroleum have been found. Though only a few wells have been drilled and it is too soon to predict an important future for the region as a petroleum producer, studies have shown that there is ample justification for further prospecting and that the region may yet be
Authors
George Curtis Martin
The southern Appalachian forests
In examining so large an area it was found that the best results could be obtained by traversing the roads and trails and making side trips wherever necessary to cover intermediate territory. Upon the topographic maps of the Geological Survey were drawn the outlines of cleared land and the several classes of forest land as they were passed. At the same time ocular estimates of the average stand an
Authors
H.B. Ayres, W.W. Ashe
The Triassic cephalopod genera of America
The marine Triassic section of .America is unusually complete, and its thickness compares favorably with that of any other region. All three subdivisions-Lower, Middle, and Upper Triassic--are represented by calcareous deposits, aggregating approximately 4,000 feet in thickness. Of this amount, about 800 feet belong to the Lower Triassic, about 1,000 feet to the Middle Triassic, and about 2,000 fe
Authors
Alpheus Hyatt, J.P. Smith
Twenty-Sixth Annual Report of the Director of the United States Geological Survey, 1904-1905
IntroductionRemarks on the work of the yearBranches of workThe United States Geological Survey was created in 1879 for the purpose—as its name implies—of examining and reporting on the geologic structure and mineral resources and products of the national domain. To the adequate description of geologic formations and structure cartography is essential, and Congress early recognized this fact by mak
Authors
Charles D. Walcott
Underflow tests in the drainage basin of Los Angeles River
No abstract available.
Authors
Homer Hamlin
Underground waters of eastern United States
The present paper is a brief summary of the underground water conditions in eastern United States, prepared to meet the demands of drillers and others for information relating to the general water resources of the various States or of specified regions.The detail with which the several regions or subjects are discussed depends mainly on their relative importance, although because of the greater am
Authors
Myron L. Fuller
Zinc and lead deposits of northwestern Illinois
Zinc and lead minerals are found in two widely separated districts in Illinois. One of these occurs in the extreme southern portion of the State and includes portions of Hardin, Pope, and Saline counties. It forms part of the Kentucky-Illinois fluorspar, lead, and zinc field, and for convenience may be referred to as the Southern Illinois district. The other occurs in the- extreme northwestern por
Authors
Harry Foster Bain
A biological reconnaissance of the base of the Alaska Peninsula
No abstract available.
Authors
Wilfred H. Osgood