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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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Filter Total Items: 171827

The relation between earth movements and volcanism in the San Juan Mountains of Colorado

The late Tertiary volcanism in the San Juan Mountains of southwestern Colorado followed a long interval during which the crust was stable. The volcanic rocks have been divided into four main groups, (1) those of pre‐Potosi (?) age in the eastern area, (2) the Lake Fork quartz latite, San Juan tuff, and Silverton volcanic series, (3) the Potosi volcanic series and the Fischer quartz latite, and (4)
Authors
Esper S. Larsen

Problems of Pleistocene Stratigraphy

No abstract available. 
Authors
L.L. Ray

Alpine glaciation

No abstract available. 
Authors
L.L. Ray

Ocoee series of the southern Appalachians

The Ocoee series is divided into four major units present from northern North Carolina to western Georgia and a fifth, younger, formation present only in southern North Carolina and Georgia. The units recognize dare as follows: The Ocoee series is a broad synclinal belt of resistant Great Smoky quartzite, which forms most of the Great Smoky Mountains and the Bald Mountains, with Nantahala slate an
Authors
W.O. George, A.J. Stose

Buried preglacial ground water channels in the Albany-Schenectady area in New York

A map is presented showing contours of the buried preglacial channel of the Mohawk River from Schenectady, New York, to its confluence with the Hudson River about 12 miles south of Albany and of associated buried preglacial channels. The Pleistocene history of a portion of the Mohawk and Hudson Rivers is discussed, and the relation of buried valleys to ground-water supplies is indicated.
Authors
Eugene S. Simpson

Magnitude and frequency of floods in Minnesota

No abstract available.
Authors
C. H. Prior
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

Preliminary report on the stratigraphy and structure of the Kukpowruk and Kokolik Rivers area, Alaska

No abstract available.
Authors
Robert M. Chapman, Edward G. Sable

Preliminary report on stratigraphy and structure of the areas of the Etivluk, Kuna, and Nigu Rivers, Alaska

No abstract available.
Authors
M. D. Mangus, R.L. Detterman, A. H. Lachenbruch, M. C. Lachenbruch

The stratigraphy and structure of the Okpikrurak and Kiruktagiak River areas, Alaska

No abstract available.
Authors
William W. Patton, I.L. Tailleur

Suggested correlation in Simpson seeps region

During the 1949 drilling season eight core tests were completed in the Simpson Seeps area up to October 25th„ This program, which is still in progress, was undertaken to provide an explanation for the surface seeps near Caps Simpson. The shallowest of the eight holes reached 800 feet; the deepest was drilled to a depth of 1460 feet.Geophysical data on the shallow horizons indicate that the Simpson
Authors
F. M. Robinson, Robert Thomas

Preliminary report on the Mississippian rocks of the Kanayut, Nanushuk, and Itkillik Lake areas, Alaska

No abstract available.
Authors
Arthur Leroy Bowsher, J. Thomas Dutro

Preliminary reports on the Carbon Creek anticline and on the upper Meade River, Alaska

No abstract available.
Authors
Charles L. Whittington, Samuel A. Keller
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