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Page 7309, results 182701 - 182725

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Twenty-seventh annual report of the Director of the United States Geological Survey
Charles D. Walcott
1906, Annual Report 27
During the last fiscal year the character of the work and the organization of the force remained substantially the same as described in the Twenty-sixth Annual Report. Accounts of the work performed in geology and paleontology, chemistry and physics, topography and geography, and hydrography, hydrology, and hydro-economics, as well as...
Zinc and lead deposits of the Upper Mississippi Valley
Harry Foster Bain
1906, Bulletin 294
The zinc and lead mines of the upper Mississippi Valley are in the southwest portion of Wisconsin and in adjacent parts of Illinois mid Iowa. The boundaries of the region are in part indefinite, since sporadic occurrences of the minerals are found outside the mining region proper. It is usual...
Silverton folio, Colorado
Whitman Cross, Ernest Howe, F. L. Ransome
1905, Folios of the Geologic Atlas 120
The term San Juan region, or simply "the San Juan," used with variable meaning by early explorers, and naturally with indefinite limitation during the period of settlement, is now quite generally applied to a large tract of mountainous country in southwestern Colorado, together with an undefined zone of lower country...
Zinc and lead deposits of northwestern Illinois
Harry Foster Bain
1905, Bulletin 246
Zinc and lead minerals are found in two widely separated districts in Illinois. One of these occurs in the extreme southern portion of the State and includes portions of Hardin, Pope, and Saline counties. It forms part of the Kentucky-Illinois fluorspar, lead, and zinc field, and for convenience may be...
Record of deep-well drilling for 1904
Myron Leslie Fuller, E. F. Lines, A. C. Veatch
1905, Bulletin 264
In this report, which is the first of a proposed series of annual publications, are presented the results of the first six months' work by the United States Geological Survey in the systematic collection of well records and samples. Much time having been occupied in organization and preliminary correspondence, the...
Twenty-Sixth Annual Report of the Director of the United States Geological Survey, 1904-1905
Charles D. Walcott
1905, Annual Report 26
IntroductionRemarks on the work of the yearBranches of workThe United States Geological Survey was created in 1879 for the purpose—as its name implies—of examining and reporting on the geologic structure and mineral resources and products of the national domain. To the adequate description of geologic formations and structure cartography is...