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    Geology (14)
    Graduate College (14)
    AuthorsBraun, Eric Rudolph, 1943- (1)Breed, William J. (1)Brown, Julia Talleur, 1957- (1)Coombs, Stanley Lane (1)Davis, Robert Ellis, 1924- (1)Ferris, J. G. (1)Iskander, Wilson,1930- (1)Lance, John F. (1)Micklin, Richard Francis, 1945- (1)Moger, Seth Raynor, 1937- (1)View MoreTypes
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    Fusulinids and conodonts of a Pennsylvanian-Permian section in the northern Dragoon Mountains, Cochise County, Arizona

    Micklin, Richard Francis, 1945- (The University of Arizona., 1969)
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    Sedimentology of Estero Marua, Sonora, Mexico

    Sandusky, Clinton LeRoy, 1942- (The University of Arizona., 1969)
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    Geology of the Mary G Mine area, Pima County, Arizona

    Davis, Robert Ellis, 1924- (The University of Arizona., 1955)
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    River terraces and other geomorphic features, Castle Hill Basin, Canterbury, New Zealand

    Breed, William J. (The University of Arizona., 1960)
    Extensive systems of terraces in Castle Hill Basin are evidence for widespread cycles of aggradation and degradation of the rivers. The surfaces formed during periods of aggradation have been named as follows: Bridge Hill surface, Long Spur surface, Enys surface, Cheeseman surfaces and Post-Cheeseman surfaces. Evidence from moraines indicates that these aggradational surfaces were created during periods of glaciation when the streams of the valley were overloaded. Degradation and valley deepening ensued during non-glacial conditions, leaving the former river floodplains preserved as glacial terraces. The terraces ol' Castle Hill Basin have been correlated with similar surfaces in the Waimakariri Valley described by Dr. Maxwell Gage.
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    The geology of the west central portion of the Patagonia Mountains, Santa Cruz County, Arizona

    Moger, Seth Raynor, 1937- (The University of Arizona., 1969)
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    An appraisal of ground water resources of Zalengei area, Darfur Province, Sudan

    Iskander, Wilson,1930- (The University of Arizona., 1967)
    Zalengei area, Darfur Province, Sudan, a semi-arid area, appears favorable in many respects for future agricultural development. The cultivation of new cash crops depends on the availability of adequate supplies of ground water of satisfactory quality to irrigate these crops. The principal aquifer in the area is unconfined in the valley fill sediments which form the Lower Terrace and the Flood Plain formations. The average thickness of the aquifer is some 90 feet, and its average transmissivity and storage coefficient are 100,000 gallons/day/foot, and 0.2 respectively. The storage capacity of the ground water reservoir is some 140,000 acre feet. Ground water is discharged from the basin by evapotranspiration, effluent seepage, and underflow out of the basin. Recharge to the ground water is from direct precipitation over the basin area, by influent seepage, and by underflow into the basin. The ground water supplies of the area have small amounts of dissolved solids, mostly bicarbonates and, carbonates. The waters that underlie Wadi Aribo are generally rich in calcium and magnesium bicarbonates, whereas those underlying Wadi Azum are rich in sodium carbonates and bicarbonates. The ground water underlying Wadi Azum is an approximate blend of the waters supplied by its tributaries and the water of the Large Dariba Lake. This lake has the highest content of fluoride yet known in natural waters. The arable land in the area is 7200 acres. The amount of ground water needed to irrigate these lands is about 21,600 acre-feet per year. About 20 per cent of this amount can be recharged to the ground water body from the annual precipitation over the basin area; the rest can be recharged by influent seepage from the wadis during flood time. Most of the water supplies are of excellent to good quality for irrigation and domestic uses.
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    Geology and ore deposits of the Marble Peak area, Santa Catalina Mountains, Pima County, Arizona

    Braun, Eric Rudolph, 1943- (The University of Arizona., 1969)
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    Petrographic study of a quartz diorite stock near Superior, Pinal County, Arizona

    Puckett, James Carl, 1940- (The University of Arizona., 1970)
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    Interpretation of the chemical analyses of the ground water of the Khorat Plateau, Thailand

    Phiancharoen, Charoen,1935- (The University of Arizona., 1962)
    The Khorat Plateau of Northeastern Thailand is a shallow saucer-shaped basin tilted slightly to the southeast. It is divided into three structural provinces with the Phu Phan folds at the center and the Sakon Nakhon and Khorat Basins on the two flanks of the folds. The plateau is mainly underlain by Triassic sandstone and shale of the Khorat Series, Permia.n limestone of the Rat Bun Series, and pre-Permian shale, sandstone, phyllite, slate, and quartzite of the Kanchana Bun Series. It is also overlain by shale and siltstone, with interbedded rock salt and gypsum of Jurassic and younger age. Alluvium and terrace deposits occur mainly along the courses of the Mun, Clii, and Mae Khong Rivers and in limestone terrane. Ground water occurs within five aquifers: alluvium, upper shale and siltstone, Phu Phan sandstone, Phra Wihan and Phu Kadung sandstones, and limestone. The ground-water system is recharged by the tropical monsoon rainfall with an annual average of about 1, 330 millimeters. The chemical quality of the ground water varies considerably. The major constituents in water of the alluvial aquifer are calcium, sodium, iron, chloride, and bicarbonate, which give hardness properties to water. The water has no salinity or alkali hazard for agriculture, however. The sources of chemical constituents are mainly from clay minerals in the aquifer and contamination with mineralized water from both the lower aquifer and leached zones0 The shale and siltstone aquifer produces water of most inferior character, among which sodium chloride, calcium sulfate, and calcium bicarbonate types are common. The principal sources of these chemical constituents are rock salts and gypsum layers existing within the aquifer. Percolating water carrying salts which have been laid down on the ground surface through capillary action and evaporation is also considered as another source. Water in the Phu Phan sandstone and Phra Wihan and Phu Kadung sandstones is generally similar in properties and character. The major dissociated ions are iron, calcium, and bicarbonate, with sodium, chloride, and sulfate in places. The principal sources are impurities of cementing materials of sandstone, residual salts in interbedded shale, and contamination by mineralized waters from overlying aquifers and leached zones. The property and character of water are satisfactory for most purposes. The limestone aquifer is free from sodium and chloride, but contains high concentrations of calcium, magnesium, sulfate, and bicarbonate, of which the sources are dolomitic limestone and gypsum. These chemical constituents are usually responsible for carbonate hardness at shallow depths and noncarbonate hardness at greater depths. The water also has salinity hazards for agricultural uses0 For ground-water development, depths of wells within the shale and siltstone aquifer should be limited to not more than 300 feet, because the salty water mostly occurs in the deeper zones. In limestone, the well should not be more than 200 feet deep, due to the occurrence of highly saline water beyond the specified depth0 In other aquifers the location and depth of wells are not critical.
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    Petrology and stratigraphy of the Epitaph Dolomite (Permian) in the Tombstone Hills, Cochise County, Arizona

    Patch, Susan, 1945- (The University of Arizona., 1969)
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