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Contributions to economic geology, 1905: Coal, lignite, and peat
M. R. Campbell, Charles Butts, Ralph Arnold, N. M. Fenneman, H. S. Gale, W. T. Lee, F. C. Schrader, W. C. Phalen, G. H. Ashley, F. B. Peck, G. B. Richardson, J. A. Taff, N. H. Darton, C.A. Fisher, A.G. Leonard, A. C. Veatch
1906, Bulletin 285-F
No abstract available....
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...