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Publication Extents

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Geology and gold deposits of the Cripple Creek district, Colorado
Waldemar Lindgren, Frederick Leslie Ransome
1906, Professional Paper 54
The Cripple Creek gold deposits, discovered in 1891, were investigated by Messrs. Cross and Penrose, of the United States Geological Survey, in 1894. The present reexamination was requested by citizens of Colorado, and . has been carried out under the financial cooperation of the State with the Federal Survey. It...
The Tertiary and Quaternary pectens of California
Ralph Arnold
1906, Professional Paper 47
This paper consists of two parts. The first is a brief outline of the different Tertiary and Pleistocene formations of California, giving the type localities, where, when, and by whom first described, their salient characters, where they and their supposed equiyalents are known to occur, the species of Pecten found...
The geography and geology of Alaska; a summary of existing knowledge, with a section on climate, and a topographic map and description thereof
A. H. Brooks, Cleveland Abbe Jr., R.U. Goode
1906, Professional Paper 45
Alaska, the largest outlying possession of the United States, is that great land mass forming the northwestern extremity of the North American continent, whose western point is within 60 miles of the Asiatic coast (PI. II). About one-quarter of this area lies within the Arctic Circle, and from the standpoint...
Geology of the Bighorn Mountains
N. H. Darton
1906, Professional Paper 51
This report is the result of studies made in the field during the seasons of 1901, 1902, 1903, 1904, and 1905. It relates to an area of about 9,000 square miles, situated mainly in the north-central portion of Wyoming and extending northward into Montana. Its location and general surroundings are...