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Publication Extents

Not all publications have extents, not all extents are completely accurate
The copper deposits of the Encampment District, Wyoming
A.C. Spencer
1904, Professional Paper 25
During the last few years prospecting in the Medicine Bow and Park ranges in northern Colorado and southern Wyoming has proved that copper-bearing minerals occur frequently and are very generally distributed over a wide region in this portion of the Rocky Mountains. This has gradually become known through the discovery...
A reconnaissance in northern Alaska across the Rocky Mountains, along Koyukuk, John, Anaktuvuk, and Colville Rivers, and the Arctic coast to Cape Lisburne, in 1901, with notes
F. C. Schrader, W. J. Peters
1904, Professional Paper 20
Since 1898 the United States Geological Survey has been carrying on systematic topographic and geologic surveys in Alaska under an appropriation made for the investigation of the mineral resources of the Territory. This work has included not only areal surveys of regions already being developed by the miner and prospector,...
Zinc and lead deposits of northern Arkansas
George I. Adams, A. H. Purdue, E. F. Burchard, E. O. Ulrich
1904, Professional Paper 24
The field work on which this report is based was carried on during the months of July, August, and September, 1902. The writer was assisted by Prof. A. H. Purdue, of the University of Arkansas, and Mr. Ernest F. Burchard. The larger portion of the time was used in the...
Newcastle folio, Wyoming-South Dakota
N.H. Darton
1904, Folios of the Geologic Atlas 107
The Newcastle quadrangle embraces the quarter of a square degree which lies between parallels 43° 30' and 44° north latitude and meridians 104° and 104° 30' west longitude.  It measures approximately 34 1/2 miles from north to south and 25 1/8 from east to west, and its area is 863...
Experiments on schistosity and slaty cleavage
George Ferdinand Becker
1904, Bulletin 241
Schistosity as a structure is important, and it is a part of the business of geologists to explain its origin. Slaty cleavage has further and greater importance as a possible tectonic feature. Scarcely a great mountain range exists, or has existed, along the course of which belts of slaty rock...