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Page 5810, results 145226 - 145250

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Report on exploration of the Wadi Yiba copper prospect, Tihamat Ash Sham quadrangle, Kingdom of Saudi Arabia
Robert L. Earhart
1969, Open-File Report 69-83
The first phase of an exploration program at The Wadi Yiba copper prospect consisted of geologic mapping, prospecting, sampling, geophysical surveys, and diamond drilling. Copper mineralization is in a sedimentary rock sequence comprised mostly of siliceous, calcareous, and dolomitic rocks metamorphosed to the greenschist facies. The metasedimentary rocks are overlain...
Floods in Gravois Creek Basin, St. Louis County, Missouri
L.D. Hauth, D.W. Spencer
1969, Open-File Report 69-122
The rapid growth of suburban St. Louis presents problems in the social and economic development of flood plains within the area. The U.S. Geological Survey, in cooperation with the Metropolitan St. Louis Sewer District, is conducting a study of the hydrology of five major drainage basins within the area of...
The Colorado River region and John Wesley Powell
Mary C. Rabbitt, Edwin D. McKee, Charles B. Hunt, Luna Bergere Leopold
1969, Professional Paper 669
A century ago John Wesley Powell-teacher, scientist, and veteran of the Civil War-set out to explore the unknown reaches of the Colorado River. He emerged from the forbidding canyons with a compelling interest in the nature of the western lands and how they could be developed for the greatest benefit...
Paleogene floras from the Gulf of Alaska
Jack A. Wolfe
1969, Open-File Report 69-323
Numerous collections of fossil plants from the Gulf of Alaska region were obtained from rocks that are well dated by marine mollusks. The mollusks indicate that the oldest possible age for the lowest plant assemblage is middle Eocene (Domengine) and that the youngest possible age for the highest Paleogene plant...
Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate
Charles Elmer Roberson, John David Hem
1969, Water Supply Paper 1827-C
The total concentration of aqueous dissolved species of aluminum that will be present in equilibrium with microcrystalline gibbsite at various levels of complexing ligand concentration are shown graphically. The graphs can be used to estimate aluminum solubility, at 25?C and 1 atmosphere total pressure, when the pH of the solution,...
Water resources of Randolph and Lawrence Counties, Arkansas
A. G. Lamonds, Marion S. Hines, Raymond O. Plebuch
1969, Water Supply Paper 1879-B
Water is used at an average rate of almost 27 million gallons per day in Randolph and Lawrence Counties, and quantities sufficient for any foreseeable use are available. Supplies for the large uses--municipal, industrial, and irrigation--can best be obtained from wells in .he Coastal Plain part of the counties and...
Ground-water resources of the Lambayeque Valley, Department of Lambayeque, northern Peru
Stuart L. Schoff, M. Juan Luis Sayan
1969, Water Supply Paper 1663-F
Ground water in the Lambayeque Valley has been developed mainly for irrigation of sugarcane and rice. The locality is on the coastal plain of northern Peru, about 650 km (kilometers) northwest of Lima, the national capital. The area considered in this study is about 1,670 sq km (square kilometers) and...
Stage-discharge characteristics of a Weir in a sand-channel stream
Don D. Gonzalez, C.H. Scott, James K. Culbertson
1969, Water Supply Paper 1898-A
A unique relation between water-surface elevation and water discharge usually does not exist for sand-channel streams. The relation is affected by changes in bed roughness and changes in bed elevation because of scour and fill. An artificial control on a sand-channel stream must control both the resistance to flow and...