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Page 7282, results 182026 - 182050

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The geology of the Lake Superior region
Charles Richard Van Hise, Charles Kenneth Leith
1911, Monograph 52
The Lake Superior region is a part of the southern margin of the great pre-Cambrian shield of northern North America.  It is bordered and overlapped on the south by Paleozoic rocks of the Mississippi Valley and on the southwest by Cretaceous deposits.  The pre-Cambrian rocks of the area, which may...
Geology and ore deposits of the Breckenridge district, Colorado
Frederick Leslie Ransome
1911, Professional Paper 75
The Breckenridge district is situated in Summit County, Colo., 60 miles. west-southwest of Denver, near the crest of the Continental Divide, and is drained by Blue River, a tributary of the Grand. Placer mining began here in 1860, but it was not until about 1879 that attention was turned to...
Thirty-second annual report of the Director of the United States Geological Survey
George Otis Smith
1911, Annual Report 32
The appropriations for the work of the United States Geological Survey for the fiscal year 1910-11 comprised items amounting to $1,477,440. The plan of operations was approved by the Secretary of the Interior and a detailed statement of the work of the several branches and divisions of the Survey is...