Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 43 for “"Continental Margins"”.
-
From Continental Margins to the Deep Ocean
… three environments: the Peruvian Margin (continental margin), the Guaymas Basin (semi-restricted), and Pacific Gyres (oxic pelagic, ~90 Myr). Proxies such as iron speciation, Mo and U concentrations, and isotopes (δ98Mo, δ15N) were used to reconstruct redox conditions and assess proxy …
-
Mass-transport deposits on Mediterranean continental margins
… Quaternary on the SW-Adriatic and SE-Sicilian margins. These mass movements and their consequences contributed to shape the continental slopes and fill the basins with characteristic signatures. Geomorphological, seismo-stratigraphic, sedimentological and biostratigraphic data provide clues to: …
-
On the propagation of free topographic Rossby waves near continental margins
… Rossby waves propagate northward up the continental rise south of New England. To study the dynamical implications of these waves as they approach the shelf, Beardsley, Vermersch, and Brown conducted an experiment in 1976 (called NESS76) in which some moored instruments were strategically …
-
On the propagation of free topographic Rossby waves near continental margins
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1979.
-
The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers
… deformation and crustal structure from continental margins to mid-ocean ridges. The first part (Ch. 2) examines the style of segmentation along the U.S. East Coast Margin and investigates the relationship between incipient margin structure and segmentation at the modem Mid-Atlantic …
-
Biodiversity, distribution patterns and trophic position of meiobenthos associated with reduced environments at continental margins
The discovery of reduced deep-sea environments and their remarkable communities of bacteria and metazoan organisms became one of the most important events in marine biology of last decades. The variable reduced environments share common features such as high content of reduced compounds (sulphides …
-
Difference in depositional behavior of hypopycnal and hyperpycnal flows in the context of continental margins
… continuous shelf systems, such as those on the continental margin, are not fully understood. Motivated by the observation that continuous shelf-like benches are found on the continental margins in oceans, but not in most lakes, it is proposed that salt is necessary for the creation of …
-
The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers
… deformation and crustal structure from continental margins to mid-ocean ridges. The first part (Ch. 2) examines the style of segmentation along the U.S. East Coast Margin and investigates the relationship between incipient margin structure and segmentation at the modem Mid-Atlantic …
-
Stratigraphy and Tectonics: Multi-Disciplinary Evaluation of Tectonic Models For the Eastern and Southern Continental Margins of North America
… regional tectonics from the eastern and southern margins of North America.</p> <p>Studies 1 & 2: The subsidence and provenance history of the Appalachian foreland basin</p> <p>Geohistory analysis of the central Appalachian foreland basin indicates that maximum subsidence rates during the Taconic …
-
Diversity of New Zealand Deep-sea Amphipoda
… taxonomic levels (family, species, genetic) on continental margins of New Zealand relative to environmental variables. Sampling was undertaken at 20 stations located on Chatham Rise and Challenger Plateau, two major geomorphic features with contrasting environmental conditions. In Chapter 1, …
-
Landscape evolution and equilibrium in Southern Africa : insights from cosmogenic noble gases in Karoo dolerites and geospatial analyses
… > 1,000 m) bound by escarpments and extensional continental margins, and the region has been influential in the development of geomorphological theory. However, the evolution of this landscape in response to tectonic and climatic forcing remains poorly understood, and is investigated here though …
-
Formation and evolution of the eastern Black Sea basin: constraints from wide-angle seismic data
Rifted continental margins and extensional basins, provide lasting records of the processes that occur during continental break-up and initial spreading. The eastern Black Sea (EBS) basin provides a good setting to study the development of continental margins, because of ongoing sedimentation …
-
A quantitative approach to the evolution of the central Walvis Basin offshore NW-Namibia : structure, mass balancing, and hydrocarbon potential
… Atlantic and its conjugated pair of passive continental margins. The Walvis Basin offshore NW-Namibia is an Early Cretaceous to recent depositional centre with a typically wedge-shaped postrift sedimentary succession covering an area of 105000km2. A 2D model transect across the central Walvis …
-
Sediments on the continental margin off South West Africa between latitudes 17⁰ and 25⁰ S
… the north-central part of the South West African continental margin. It covers approximately 57 000 n.miles² , and extends from 2 n.miles offshore to a depth of about 1 500 m. Four cruises of the R.V. THOMAS B. DAVIE were undertaken over a two year period (May, 1972 to May, 1974) to collect 555 …
-
Development and deployment of a novel deep-sea in situ bubble sampling instrument for understanding the fate of methane in the water column
… hydrate clathrate form in marine sediments along continental margins and will often escape from the seafloor and rise through the water column as bubbles. The estimated marine methane hydrate inventory is over 600 times greater than the current atmospheric concentration so the fate of this …
-
Development and deployment of a novel deep-sea in situ bubble sampling instrument for understanding the fate of methane in the water column
… hydrate clathrate form in marine sediments along continental margins and will often escape from the seafloor and rise through the water column as bubbles. The estimated marine methane hydrate inventory is over 600 times greater than the current atmospheric concentration so the fate of this …
-
Quantifying turbidity current interactions with topography
… are responsible for crafting the morphology of continental margins. Unfortunately, very few direct observations exists defining turbidity current interactions with submarine channels and canyons because infrequent occurrence, great water depths, and high current velocities make measurements …
-
Submarine Geomorphology of the Continental Shelves of Southeast and Southwest Greenland from Olex Data
… data to investigate the geomorphology of the continental margins of Southern Greenland. In particular, Olex data, which consist of multiple single-beam echo-sounder lines, were utilised. Turbidity current-channel systems and gullies on the continental slopes, and moraines on the continental …
-
Upper slope geomorphology of Sardinian southern continental margin, applications to habitat mapping supporting marine strategy
… Directive, is focused on Sardinian southern continental margins marine habitat mapping. Aim of this thesis is to produce predictive marine habitat mapping, starting from a detailed geomorphologic study integrated with biological and oceanographic data coming both from original direct surveys …
Page 1 of 3