- 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.
Search results
Showing 81 to 90 of 4186 (0.03 seconds)| 81 |
Geology of the Agua Verde hills, Pima county, ArizonaKerns, John Robert, 1930- January 1958 (has links)
No description available.
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| 82 |
The Margaret Wash section of the Mogul fault, Pinal County, ArizonaJinks, Jimmie E. January 1961 (has links)
No description available.
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| 83 |
Geology of the Owl Head mining district, Pinal county, ArizonaBarter, Charles Fredrick, 1937- January 1962 (has links)
No description available.
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| 84 |
Supergene mineralogy and processes in the San Xavier mine area, Pima County, ArizonaArnold, Leavitt Clark, 1940- 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 has been removed from reaction by inclusions with gypsum.
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| 85 |
The development of education in Coconino CountyParker, Paul E. January 1939 (has links)
No description available.
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| 86 |
The general geology of the Picacho Peak areaBriscoe, James Austin, 1941- January 1967 (has links)
No description available.
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| 87 |
Geology of a portion of the Coyote Mountains, Pima County, ArizonaKurtz, William Lang, 1931- January 1955 (has links)
No description available.
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| 88 |
The biota of Sierra Ancha, Gila county, ArizonaJohnson, R. Roy (Raymond Roy), 1932- January 1960 (has links)
No description available.
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| 89 |
The geology of the Paymaster and Olivette Mining areas, Pima County, ArizonaWaller, Harold Everett, 1933- January 1960 (has links)
No description available.
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| 90 |
Geology and origin of the breccias in the Morenci-Metcalf district, Greenlee County, ArizonaBennett, Kenneth Carlton, 1946- January 1975 (has links)
No description available.
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