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Page 5949, results 148701 - 148725

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The geology, mineralogy and paragenesis of the Castrovirreyna lead-zinc-silver deposits, Peru
Richard Wheatley Lewis Jr.
1964, Open-File Report 64-103
The Castrovirreyna mining district lies in the Andean Cordillera of South Central Peru, and has been worked sporadically since its discovery in 1591. Supergene silver ores were first mined. Currently the district produces about 20,000 tons of lead-zinc ore and 5000 tons of silver ore annually. The district is underlain by...
Water levels in observation wells in Santa Barbara County, California, 1963
K. S. Muir
1964, Open-File Report 64-117
The U.S. Geological Survey, in cooperation with the Santa Barbara County Water Agency, continued the study of the ground-water resources of Santa Barbara County (fig. 1) in 1963. As part of the study, the Geological Survey made monthly water-level measurements in 247 wells; 17 of which were equipped with automatic...
Ground-water resources of southern New Castle County, Delaware
Donald Robert Rima, O. J. Coskery, P.W. Anderson
1964, Water Supply Paper 1756
Southern New Castle County has a land area of 190 square miles in northcentral Delaware. It is predominantly a rural area with a population of about 9,500 people who are engaged chiefly in agriculture. By and large, the residents are dependent upon ground water as a source of potable water....
A correlation procedure for augmenting hydrologic data
N.C. Matalas, Barbara Jacobs
1964, Professional Paper 434-E
A linear regression for a short and long sequence of hydrologic events is used to lengthen the short sequence. The lengthened sequence consists of the original observations and regressed values plus noise, where the noise is a random variable with zero mean and variance proportional to the variance of the...
General effects of drought on water resources of the southwest
J. S. Gatewood, Alfonso Wilson, H. E. Thomas, L. R. Kister
1964, Professional Paper 372-B
The effects of drought are most pronounced on soil moisture, because soil is the prime recipient of the water from precipitation, and upon streamflow, because it is the residual water that is not accepted by or that flows out from the soil and groundwater reservoirs. Studies by statistical correlation of...