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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.

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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.

Filter Total Items: 83829

The Colorado formation and its invertebrate fauna

No abstract available.
Authors
T. W. Stanton

The Death Valley expedition: a biological survey of parts of California, Nevada, Arizona, and Utah. Part II

No abstract available.
Authors
Albert Kenrick Fisher, Leonhard Steineger, Charles Henry Gilbert, Charles V. Riley, Robert Edwards Carter Stearns, C. Hart Merriam, Theodore S. Palmer

The eruptive and sedimentary rocks on Pigeon point, Minnesota and their contact phenomena

No abstract available.
Authors
William Shirley Bayley

The Glaciation of the Yellowstone Valley North of the Park

The local glaciers of Quaternary times, of which evidences abound throughout the highest portions of the Rocky mountain cordillera, attained an unusually extensive development in that broad elevated region known as the Yellowstone Park. It was indeed the center of a considerable ice sheet whose glaciers spread out and down the valleys leading from this mountain region in all directions. In the nor
Authors
Walter Harvey Weed

The Laramie and the overlying Livingston formation in Montana, with report on flora

No abstract available.
Authors
Walter Harvey Weed, Frank Hall Knowlton

The Mesozoic Echinodermata of the United States

No abstract available.
Authors
William Bullock Clark

The Paleozoic section in the vicinity of Three Forks, Montana

No abstract available.
Authors
A.C. Peale, George P. Merrill

The trap dikes of the Lake Champlain region

No abstract available.
Authors
James Furman Kemp, Vernon Freeman Marsters

Thirteenth Annual report of the United States Geological Survey to the Secretary of the Interior, 1891-1892: Part 2. Geology

No abstract available.
Authors
J. W. Powell

Thirteenth Annual report of the United States Geological Survey to the Secretary of the Interior, 1891-1892: Part 3. Irrigation

No abstract available.
Authors
J. W. Powell

Suggestions for the preparation of manuscript and illustrations for publication by the U.S. Geological Survey

No abstract available.
Authors
W.A. Croffut, Thomas Hampson

Chattanooga Folio, Tennessee

The Geological Survey is making a large topographic map and a large geologic map of the United States, which are being issued together in the form of a Geologic Atlas. The parts of the atlas are called folios. Each folio contains a topographic map and a geologic map of a small section of country, and is accompanied by explanatory and descriptive texts. The complete atlas will comprise several thou
Authors
Charles Willard Hayes