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Page 6298, results 157426 - 157450

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Review of literature on the endangered masked bobwhite
Roy E. Tomlinson
1972, Resource Publication 108
The masked bobwhite (Colinus virginianus ridgwayi) once inhabited restricted areas in southern Arizona and middle Sonora, Mexico. It probably never was a widespread and abundant bird. Ornithologists discovered this race in 1884, presumably during its final decline in Arizona due to overgrazing and a series of droughts. . It was...
Preliminary geologic map of the northeastern part of the Tanana quadrangle, Alaska
Robert M. Chapman, Warren Yeend
1972, Miscellaneous Field Studies Map 342
Mapping is based on both ground observations and aerial observations from a helicopter, August 11-19 and September 1-5, 1970, and supplemented by interpretation from aerial photographs. Bedrock geology chiefly by R.M. Chapman, and surficial geology chiefly by W.E. Yeend....
Reconnaissance geologic map and geochemical analyses of stream-sediment and rock samples of the Anchorage A-6 quadrangle, Alaska
Sandra H. B. Clark, Martha E. Yount
1972, Miscellaneous Field Studies Map 351
A reconnaissance geologic map and analytical data for 70 stream-sediment samples and 34 rock samples for the Anchorage A-6 1:63,360 scale quadrangle are presented in this report, together with a statistical treatment of the geochemical data. The bedrock was mapped and samples collected during the summers of 1969, 1970, and...
Benefaction studies on the Hasan Celebi magnetite deposit, Turkey
Jean W. Pressler, Ali Akar
1972, Open-File Report 72-303
Bench-scale and semicontinuous tests were performed on surface, trench, and diamond drill core samples from the Hasan Celebi low-grade magnetite deposit to determine the optimum benefication procedures utilizing wet magnetic separation techniques. Composite core samples typically contain about 27 percent recoverable magnetite and require crushing and grinding through 1 mm...