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Page 6547, results 163651 - 163675

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Copper
Sidney Paige, W. H. Emmons, F.B. Laney
1911, Bulletin 470-C
No abstract available....
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...