Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2006. / Includes bibliographical references (p. 111-113).

Thesis (M. En.)--Miami University, Institute of Environmental Sciences, 2006. / Title from first page of PDF document. Includes bibliographical references (p. 32-35).

Thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979. / Vita. Includes bibliographical references (p. 206-211).

Thesis (Ph. D.)--Göteborg University, 2006. / Includes bibliographical references.

Thesis (M.S.)--University of Missouri-Columbia, 2005. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 11, 2007) Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.

No description available.

Orientadores: Giorgio Basilici, Francisco Sergio Bernardes Ladeira / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias / Made available in DSpace on 2018-08-11T17:30:45Z (GMT). No. of bitstreams: 1 DalBo_PatrickFranciscoFuhr_M.pdf: 16776523 bytes, checksum: ed0ae352d6fc4dea57e9f4119eee8537 (MD5) Previous issue date: 2008 / Resumo: A Formação Marília (Maastrichtiano), na faixa de afloramentos da porção noroeste da Bacia Bauru (estados de Goiás e Mato Grosso do Sul), é interpretada neste trabalho como um antigo sistema eólico de lençol de areia. A sucessão vertical é caracterizada por arenitos muito finos a médios intercalados com paleossolos em espessas sucessões de até 150 metros de espessura. A litofácies Arenito com laminação plano-paralela, que forma corpos com estratificação cavalgante transladante subcrítica, atribuída à deposição de areias com marcas onduladas eólicas é a mais comum descrita na área de estudos. Os paleossolos representam mais de 65% do registro geológico da Formação Marília, constituídos predominantemente por Aridisols caracterizados por concentrações secundárias de carbonato de cálcio. Superfícies suborizontais de deflação eólica separam os depósitos eólicos dos paleossolos e dividem a Formação Marília em duas fases distintas de construção de corpos geológicos ligadas às variações paleoclimáticas: i) fase de sedimentação eólica, caracterizada por depósitos arenosos de marcas onduladas eólicas; ii) fase de paleopedogênese, caracterizada por Aridisols. Ambas as fases se alternaram temporalmente e, registram períodos de formação de diferentes ordens de grandeza, provavelmente maiores que 105 vezes entre a formação dos depósitos arenosos com marcas onduladas eólicas e o desenvolvimento de horizontes Bk dos Aridisols. A alternância cíclica entre depósitos eólicos e paleossolos está ligada a variações paleoclimáticas que controlaram a disponibilidade hídrica no ambiente. Durante os períodos mais secos, a ausência de cobertura vegetal expôs a superfície à ação dos ventos e formação de extensas superfícies de deflação eólica, que posteriormente foram cobertas por depósitos arenosos de marcas onduladas eólicas. Com o posterior restabelecimento da umidade atmosférica e o conseqüente aumento da cobertura vegetal, a superfície foi reestabilizada, inibindo o processo de deflação e deposição eólica e permitindo a formação de Entisols e Aridisols / Abstract: The Marília Formation (Maastrichtian), outcropping in the northwestern portion of the Bauru Basin (Goiás and Mato Grosso do Sul brazilian states), is interpreted here as an ancient Aeolian sand sheet. The vertical succession, c.150 m thick, is made up of very fine to medium-grained sandstone and, it is characterised by cyclic interbedding of sediments and palaeosols. Planar laminated sandstone (subcritically climbing translatent stratification), formed by aeolian sand with wind ripple, is the most common lithofacies. Palaeosols, mainly Aridisols, represent more than 65% of the geological record of the Marília Formation. Subhorizontal aeolian deflation surfaces divide Marília Formation in two distinct constructional phases of geological bodies linked to palaeoclimatic variations: i) phase of prevalent aeolian sand deposition; ii) phase of Aridisols development. The two phases they alternated in time and probably record periods of formation with difference of the order greater than 105 between aeolian sand deposition and development of the Bk Aridisols horizons. Palaeoclimate is the main forcing factor of the Aeolian sand deposition and soil development. Episodes of sedimentation and soil development likely result from cyclic decreases and increases in available moisture and vegetation cover. Aeolian deflation and sedimentation were predominant during drier phases of past climatic cycles, when vegetation cover was sparse in source areas and windier conditions have the capacity to remove and transport clastic materials. During wetter phases of climatic cycles, increased vegetative cover stabilised the landscape, reduced deflation, and intensified Entisols and Aridisols development / Mestrado / Geologia e Recursos Naturais / Mestre em Geociências

From Introduction: For at least two centuries and a corresponding number of generations of geologists and miners there has been active argument concerning the origin of certain types of carbonate hosted mineral deposit. The characterization of the type itself was and still is debatable. Objections have been raised to grouping several examples under one heading because each has its individually distinctive features. ·This is especially applicable to the carbonate hosted lead-zinc "sedimentary" deposits. The type that will be discussed in the text to follow is composed chiefly of galena, sphalerite, barite and fluorite, with pyrite , marcasite and chalcopyrite as conspicuous accessory ore minerals. Exceptions to this general copper deficient characteristic displayed by the sedimentary carbonate-hosted lead-zinc deposits are the deposits at Tsumeb and Kombat, Namibia. These deposits are hosted by the carbonate sequence of the Otavi Shelf sediments, and copper, in the form of tennantite, chalcopyrite and bornite, is the major ore constituent. Calcite, aragonite, dolomite and quartz are the commonest nonmetallic gangue minerals but siderite and silica may also be present. In contrast with other lead and zinc sulphide (volcanogenic) deposits, those to be considered here seldom carry noteworthy amounts of silver or any other precious metals. Commonly the country rock is a carbonate; limestone or dolomite, but deposits in. sandstone, shale and conglomerate are not unknown. Characteristic features are ore bodies that extend parallel or nearly so with the bedding although many such deposits are partly, or completely developed along crosscutting fissures and breccias. Some observers regard these fissure fillings as evidence for a magmatic source of the metals, whereas others regard them as an indication of remobilization of ions, metals or minerals orginally present in low-grade stratiform deposits elsewhere in the stratigraphic succession.

The Eureka Sound Formation in the eastern Canadian Arctic Archipelago is an Upper Cretaceous to Paleogene pre- and syn-tectonic deposit that records the uplift and segmentation of the Early Carboniferous to Tertiary Sverdrup Basin. Scattered outliers of the Eureka Sound Formation on southern Ellesmere Island rest unconformably on or are faulted against Devonian strata. In the vicinity of Vendom, Stenkul, Baumann and Sor Fiords, the Eureka Sound Formation attains a maximum thickness of 480 m and comprises a sequence of nonmarine and brackish water deposits that ranges in age from mid-Paleocene to Late Eocene. Eureka Sound strata which crop out along the shores of Stenkul Fiord are divided into four lithofacies assemblages. The stratigraphic section is composed mainly of two nonmarine assemblages which alternate throughout the sequence. Lithofacies Assemblage I consists of fining-upward sandstones which attain thicknesses of 20 m and are interpreted as fluvial deposits. Lithofacies Assemblage II comprises interbedded mudstones and coal in seams up to 8 m thick, and are interpreted as floodbasin deposits of an alluvial plain. Two marine lithofacies assemblages (III, IV) are recognized locally and constitute a minor part of the stratigraphic succession. Lithofacies Assemblage III comprises the basal strata in the study area and consists of approximately 90 m of buff-weathering mudstones and interbedded thin coals which were deposit ed in brackish lagoonal, estuarine and salt marsh environments. Lithofacies Assemblage IV occurs locally in the middle of the stratigraphic section and consists of up to 10m of white, well sorted quartz arenites and minor mudstones, which are interpreted as deposits of a barrier island system. To the northeast of Stenkul Fiord at Makinson Inlet, outliers of the Eureka Sound Formation rest unconformably on Paleozoic strata, and are in turn overlain with angular unconformity by as much as 120 m of Early Miocene fanglomerates of the Beaufort Formation. The ages of these sediments, in conjunction with ages reported from the Eureka Sound and Beaufort Formations in other parts of Ellesmere and Axel Heiberg Islands, bracket the timing of the orogenic phase of the Eurekan orogeny in the eastern Arctic as Late Eocene to Miocene. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate