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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
301

An evaluation of hydrologic and riparian resources in Saguaro National Park, Tucson, Arizona

Baird, Kathryn J., Mac Nish, Robert, Guertin, D. Philip January 2001 (has links)
Cooperation Agreement No. CA 8000 -2 -9001 Work Order No. 8039 -2 -9001 / Within Saguaro National Park only Rincon Mountain District contains significant riparian areas. The geologic framework of the Tanque Verde Ridge and Rincon Valley exerts strong control on the hydrology of these riparian systems. Pantano fault constitutes a line of hydrogeologic separation between the occurrence and utilization of groundwater in the Rincon Valley and the main Tucson basin. No known, comparable fault isolates the upper Tanque Verde Creek alluvium from downstream pumping effects. However, east of the confluence with Agua Caliente Wash, the highly permeable alluvial materials are much thinner, and serve to dampen such downstream effects. Therefore, the ground water reservoirs supporting the riparian areas within Rincon Mountain District are not directly connected to the Tucson basin aquifer. In what is described herein as upper basin areas, high gradient tributary streams to Tanque Verde Creek and Rincon Creek have discontinuous bodies of shallow alluvium interspersed with bedrock channel. Alluvium has accumulated behind small faults or resistant bedrock ledges and contains shallow ground water basins that support small pockets of riparian or xeroriparian vegetation. The ground water in these small basins is sustained by seeps or springs, and by runoff from precipitation and is not likely to be connected to a regional ground water system. In what we have characterized as middle basin areas, the stream gradients are less than 25m/km. In these low gradient reaches, the alluvial floodplain sediments are continuous, though not thick, as ledges of more resistant bedrock formations appear in the stream channel. These low gradient reaches contain larger volumes of ground water than the high gradient basins and support more robust riparian vegetation. The ground water in the low gradient reaches is believed to be connected to the regional ground water system. Such a low gradient reach exists in a tributary to Tanque Verde Creek about 1.4 km east of Wentworth Road and extends about 1.6 km into the Park. A similar low gradient reach occurs along Rincon Creek in the Expansion Area, and at the mouths of Chiminea and Madrona Creeks.
302

MOMENTUM SPECTRA OF CHARGED PARTICLES DETECTED BY A MOUNTAIN ALTITUDE COSMIC RAY MASS SPECTROMETER.

SEMBROSKI, GLENN HARRY. January 1983 (has links)
A cosmic ray magnetic particle spectrometer utilizing wire spark chambers and a superconducting magnet for momentum determination and scintillators for charge and velocity determination has been operated on top of Mt. Lemmon near Tucson, Arizona at an atmospheric depth of 747 g/cm². Twenty weeks of data were taken and the proton energy spectrum in the momentum range of 0.6 to 2.4 GeV/c has been determined. Antiproton events were observed and a p/p ratio of 1.5(+1.85,-0.95) x 10⁻³ at a momentum of 1.05 GeV/c was measured. Deuteron intensities and alpha particle upper limits for this energy region are also presented.
303

Geologic Interpretations of a Siliceous Breccia in the Colossal Cave Area, Pima County, Arizona

Acker, Clement John January 1958 (has links)
In the Colossal Cave area, Pima County, Arizona, massive blocks of Paleozoic sedimentary rocks have been thrust from a southerly direction over an irregular surface of Rincon Valley granite of Laramide age. The Paleozoic rocks involved in the thrusting are the Bolsa quartzite, Abrigo formation, Martin limestone, Escabrosa limestone, Horquilla limestone, and Andrada formation. The Pantano formation (Miocene ?) is also present under the thrust sheet. The thrusting is of an imbricate nature with slip-page mainly teaking place along incompetent rock units. Large folds occur in the Escabrosa limestone and Horquilla lime-stone. A siliceous breccia is associated with thrust planes in the area. The competent units of the Paleozoic sediments were fractured and brecciated along the thrust planes. Solutions dissolved part of the silica and hematite from the Bolsa quartzite and deposited it in the fractured and brecciated zones.
304

Supergene Mineralogy and Processes in the San Xavier Mine Area-Pima County, Arizona

Arnold, L. Clark January 1964 (has links)
This is a study of the supergene mineralogy of the San Xavier West mine located in the Pima mining district, Pima County, Arizona. The number and composition of secondary species collected are found to be closely related to the relative amounts of the various primary minerals and to the manner in which they were emplaced in the host rock. Supergene mineral species were selected that appeared to be in equilibrium with their environment, and certain assumptions are made concerning the stability fields of these minerals. The equilibrium conditions in most cases can be narrowed and often closely defined by combining the stability fields of several secondary minerals. On this basis, two acid environments and one alkaline environment are found to exist and are separable on the basis of mineralogy. The fields of chalcanthite and melanterite define a highly acid environment while those of goslarite and malachite define an environment of lower acidity. The association of calcite, rosasite, hemimorphite, and malachite indicate an alkaline environment. The acidity of the environments is principally determined by the amount of pyrite present, and pH may be lower than 3 if pyrite is abundant and reactive carbonate material lacking. Also, knowledge of stability relations allowed the history of enrichment and subsequent oxidation to be followed in a case where a transitional species had been removed from reaction by inclusion with gypsum.
305

The Geology and Mineralization of the Sedimentary Hills Area, Pima County, Arizona

Bennett, Paul J. January 1957 (has links)
Mildly metamorphosed Cretaceous siltstones, arkoses and limey shales and a small composite stock of granitic composition are the principal rocks exposed in the Sedimentary Hills area, which lies six miles west of Tucson, Arizona. About 2400 feet of sediments were measured and assigned to the Amole Arkose Formation. The beds dip to the south and strike northwesterly. The stock is composed of two granitic facies. The northern and earlier part of the stock is a quartz monzonite which is mildly altered. The southern part of the intrusive is a granite porphyry which is altered to a greater degree and exhibits significant disseminations of chalcopyrite and pyrite. A quartz-pegmatite plug, probably a late phase of the intrusions, intrudes the quartz monzonite. Structure in the area is dominated by a large thrust zone which strikes generally parallel to the bedding. Within the Sedimentary Hills area, normal faulting and drag folding are tributary to the thrusting. Minor copper oxide minerals are frequent along large and small faults, and in the granite porphyry stock. Wide brick-red and brown gossans occur along the major thrust plane.
306

Effects of time on the revegetation of copper mine wastes

Norem, Margaret Alice January 1980 (has links)
No description available.
307

A determination of the sulfur isotopic signature of an ore-forming fluid from the Sierrita porphyry copper deposit Pima County, Arizona

Turner, Kent January 1983 (has links)
No description available.
308

Elaboración de prendas para bebés - Baby Moda Shop

Flores Luján, Darwin, Medina Marin, Anne Vereniz, Mendoza Cardenas, Helen, Vargas Cancho, Liliana, Vilca Caycho, Laura Gabriela 19 July 2021 (has links)
Nuestro proyecto de negocio llamado Baby Moda Shop se realizó pensando en las necesidades del consumidor, pues actualmente los clientes de ropa para bebé valoran la calidad del producto, así como el diseño de las prendas. Además, se ha determinado la necesidad de aquellos padres que buscan vestir a sus pequeños de manera rápida y práctica. Por ello, ofrecemos un producto con estos tres atributos que son valorados por los padres, pues nuestras prendas están confeccionadas para bebés de 0 a 12 meses, por lo que usamos como tela el algodón pima. Asimismo, ofrecemos los diseños de calidad y el valor agregado de utilizar los broches imantados para facilitar el cambio y darle una mayor practicidad al vestir a los bebés. Nuestro local estará ubicado en el distrito de Surco, Lima, estaremos enfocados a los NSE A, B y C, nuestra fuente de ingreso será la venta de ropa para bebés y para ello trabajaremos con un plan de marketing que nos permita lograr posicionamiento en el mercado objetivo, por medio de publicidad en redes sociales, influencers y página web. / Our business project named "Baby Moda Shop" was made thinking in consumer´s needs, because nowadays baby clothing costumers highly value the product quality as well as the clothing design. Furthermore, have been seen the necessity of parents, who seek to dress their children in a simple and fast way. That’s why, we offer a product with these three benefits that parents cares, our clothing are made for babies for zero to twelve months, so we use Pima cotton fabrics. In addition, we offer quality designs and the value added of using magnetic brooches to make it easier changing clothes and give more practicality when to dress babies. Our main Store will be in Surco, Lima; we are going to focus on NSE A, B and C, our incomes are going to be the sales of baby clothing therefore we are working with a marketing plan that allows us to positioned in the market target, using social media advertising, influencers, and a web page. / Trabajo de investigación
309

Planning and zoning in Tucson and Pima County, Arizona

Malsh, William Ronald, 1913- January 1953 (has links)
No description available.
310

Structure and petrology pertaining to a beryl deposit, Baboquivari Mountains, Arizona

Clark, Jackson Lutellus, 1918- January 1956 (has links)
No description available.

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