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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: 83823

Report on astronomical work of 1889 and 1890

No abstract available.
Authors
Robert Simpson Woodward

Results of a biological survey of the San Francisco Mountain Region and Desert of the Little Colorado, Arizona

No abstract available.
Authors
Clinton Hart Merriam, Leonhard Steineger

Tenth Annual report of the United States Geological Survey to the Secretary of the Interior, Part 1: 1888-1889

No abstract available.
Authors
J. W. Powell

Tenth Annual report of the United States Geological Survey to the Secretary of the Interior, Part 2: 1888-1889

No abstract available.
Authors
J. W. Powell

The gabbros and associated rocks in Delaware

No abstract available.
Authors
Frederick Dixon Chester

The glacial boundary in western Pennsylvania, Ohio, Kentucky, Indiana, and Illinois

No abstract available.
Authors
G. Frederick Wright, Thomas C. Chamberlin

The greenstone schist areas of the Menominee and Marquette regions of Michigan, a contribution to the subject of dynamic metamorphism in eruptive rocks

No abstract available.
Authors
George Huntington Williams, Roland Duer Irving

The relations of the traps of the Newark system in the New Jersey region

No abstract available.
Authors
Nelson Horatio Darton

Volume XIII: The tertiary insects of North America

That creatures so minute and fragile as insects, creatures which can so feebly withstand the changing seasons as to live, so to speak, but a moment, are to be found fossil, engraved, as it were, upon the rocks or embedded in their hard mass, will never cease to be a surprise to those unfamiliar with the fact. "So fragile," says Quinet, "so easy to crush, you would readily believe the insect one of
Authors
Samuel H. Scudder

Descriptions of fourteen new species and one new genus of North American mammals

No abstract available.
Authors
Clinton Hart Merriam

Eighth annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 1

The Geological Survey was organized, with Mr. Clarence King as Director, in March, 1879. In March, 1881, Mr. King resigned and the present Director was appointed. From its organization to the present time the Survey has steadily grown as Congress has enlarged its functions and increased its appropriations. During this time the scientific organization has gradually developed to the condition set fo
Authors
J. W. Powell

Eighth Annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 2

No abstract available.
Authors
J. W. Powell