Reports
Science Quality and Integrity
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 data of geochemistry
Upon the subject of geochemistry a vast literature exists, but it is widely scattered and portions of it are difficult of access. The general treatises, like the classical works of Bischof and of Koth, are not recent, and great masses of modern data are as yet uncorrelated. The American material alone is singularly rich, but most of it has been accumulated since Roth's treatise was published. The
Authors
Frank Wigglesworth Clarke
The middle and upper Eocene floras of southeastern North America
No abstract available.
Authors
E. W. Berry
The Ruby-Kuskokwim region, Alaska
No abstract available.
Authors
John Beaver Mertie, George Leavitt Harrington
The San Juan Canyon, southeastern Utah: A geographic and hydrographic reconnaissance
This report, which describes the San Juan Canyon, San Juan River and the tributary streams and the geography and to some extent the geology of the region, presents information obtained by me during the descent of the river with the Trimble party in 1921. The exploration of the canyon, which was financed jointly by the United States Geological Survey and the Southern California Edison Co., had as i
Authors
Hugh D. Miser
Upper Cretaceous and Tertiary formations of the western part of the San Juan Basin Colorado and New Mexico. Flora of the Animas formation
No abstract available.
Authors
John B. Reeside, F. H. Knowlton
Water powers of the Great Salt Lake basin
The Great Salt Lake basin comprises that part of the Great Basin that drains into Great Salt Lake, Utah. It is about 27,000 square miles in area and includes the northern part of Utah, a small part of eastern Nevada, the southeast corner of Idaho, and the southwest corner of Wyoming.The eastern part of the area consists of mountainous highlands; the western part chiefly of low-lying plains. The lo
Authors
Ralf Rumel Woolley, Nathan Clifford Grover, Nathan C. Grover, W. T. Lee
A biological survey of the Pribilof Islands, Alaska
No abstract available.
Authors
Edward A. Preble, Waldo Lee McAtee
A geologic reconnaissance in the Gulf Coastal Plain of Texas near the Rio Grande. New species of mollusca from the Eocene deposits of southwestern Texas
No abstract available.
Authors
A. C. Trownbridge, Julia Gardner
A method of measuring and plotting the shapes of pebbles
No abstract available.
Authors
C.K. Wentworth
A section of the Paleozoic formations of the Grand Canyon at the Bass trail
The thick series of horizontal strata of Paleozoic age which makes the greater part of the wall of the Grand Canyon is probably broadly familiar to more people than the strata exposed in any other area in the western United States. Each detail of form or color in the wall is so definitely associated with a bed or set of beds in the series that these strata are the very elements of the canyon lands
Authors
L. F. Noble
Additions to the flora of the Wilcox group
A rather full account of the extensive flora contained in the lower Eocene strata of the Mississippi embayment which are referred to the Wilcox group was published in 1916. At that time it was not possible to obtain sections of the numerous specimens of petrified wood that had been collected from these beds.
These woods have since been sectioned and studied, and it seems eminently desirable to pl
Authors
Edward Wilber Berry
Boundaries, areas, geographic centers and altitudes of the United States and the several States with a brief record of important changes in their territory
Boundaries between countries are established by treaties made by the sovereign powers concerned.A boundary between two States of the United States may be changed by agreement of the State legislatures, but this agreement must be approved by Congress. The United States Congress can not change a State boundary without the consent of the State, nor can two States by mutual agreement change their comm
Authors
Edward M. Douglas