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 13 of 13 for “"shelf margin"”.
-
Late Quaternary Louisiana Shelf-Margin Deltaic Deposition, North-Central Gulf of Mexico
… framework for an area of the Louisiana shelf, north-central Gulf of Mexico. The depositional history of the study area is poorly understood, especially within the last cycle of major eustatic fluctuation (~18, 000 yrs BP – present). Data sets used in this study include pre-existing and …
-
The refraction, shoaling and structure of non-linear internal waves at a continental shelf margin
… of internal waves near the Continental shelf-edge are generally ascribed to generation by oscillating tidal flow over the local bathymetry, in the presence of a stratified water column, giving rise to the internal tide. In this thesis observations are presented which demonstrate that …
-
Multi-Disciplinary Analyses of Outcropping Late Cretaceous Clinoform Stratigraphy, Magallanes Basin, Chile
Shelf margins are critical transfer zones where sediment, organic matter, and associated fluids move from continents to deep-marine basins. Clinoforms, shelf-edge deltas, submarine canyons, and deep-water channels are central components of these systems, yet their stratigraphic architecture, …
-
Seismic-stratigraphic analysis of shelf-margin delta/slope fan and basin floor fan on high-latitude and middle-latitude margins (Ross Sea, Weddell Sea and Alabama/West Florida shelf): Paleoclimatic and eustatic implications
… studies in three very different continental margin settings. The first chapter discusses the northwestern Ross Sea, the second discusses the southeastern Weddell Sea and the third discusses the Alabama/west Florida margin. The purpose was to investigate stratigraphic relationships between …
-
Sequence stratigraphy and structure of the tertiary limestones in the Gulf of Papua,Papua New Guinea
… interpreted across these sequences, namely deep-shelf, shallow-shelf, backreef, reef, shoal, forereef, basin margin and submarine fan facies. Each facies was differentiated according to seismic character and geometry, well core and cuttings descriptions, and its position in the depositional …
-
Fluvial influence on high-frequency sedimentary cycle geometry: The transition from strandplain to deltaic deposition in the Cretaceous Point Lookout Sandstone, San Juan Basin, Colorado
… systems tract progradation and subsequent shelf-margin systems tract deltaic deposition. Posamentier and Vail's (1988) model of deposition during base-level fail in the absence of fluvial incision predicts many of the stratigraphic relationships observed in the field, and provides the best …
-
Geomorphologic Evaluation of the Gulf of Mexico, Northwest Garden Banks, and Supra/Inter/Subsalt Architectural Influences on Possible Reservoir Characterization from the Miocene to Pleistocene Epochs
… 3D data for the analysis of sediment feeders, shelf-margin location, timing of salt diapirism, faulting, and fluid migration can lend useful clues to the spatial patterns of plays. The 3D data focus mainly on blocks 236, 237, 191, 192, and 193. The 2D seismic data, while less precise, are used …
-
A Geological Interpretation of 3D Seismic Data of a Salt Structure and Subsalt Horizons in the Mississippi Canyon Subdivision of the Gulf of Mexico
… coming from North America has bypassed the shelf margin into Deep Water. In an Attempt to attack this challenge this thesis pretends to break the GOM's false bottom, mainly comprised by diverse salt structures and growth fault families. In this attempt, geological and geophysical data are …
-
Depositional environments and diagenesis, Winnipegosis Formation (Middle Devonian), Williston Basin, North Dakota
… of deposition which include deep basin, deep shelf, shallow shelf, reef, lagoon, tidal flat, and evaporite basin. The deposition of the Winnipegosis and Prairie Formations were inter-related and occurred during six episodes. Following a brief hiatus separating the underlying Ashern Formation …
-
Continental Deformation: Collisional Orogenesis to Passive Margin Processes
… cycle, intracontinental collision and passive margin development. I present a map of NW Nepal river channel steepness (ksn), a proxy for rock uplift rate over 103-105 years, coupled with a seismotectonic model, and then expand this map and accompanying model to the entire Himalaya; and a …
-
Porosity Development Within Lobes to Downslope Ramp Deposits on a Prograding Carbonate Shelf of the Kinderhookian to Osagean Series in Northwest Arkansas
… generated on the Mississippian Burlington shelf moved southward by gravity flows from the shelf margin to positions on a prograding ramp in Arkansas where overlapping deposits with lobate geometries accumulated. These deposits are recognized in outcrops of the Boone Formation. Stratigraphic …
-
High-resolution sequence stratigraphy and diagenesis of mixed carbonate/siliciclastic successions.
… cements (to a more marine value) occurs within shelf-margin or lowstand systems tracts where rates of ~e1ative sea-level are rising increasingly quickly and, a dominance of marine cements occurs within coarser gramed beds of transgressive systems tracts. At the sequence scale, early diagenesis …
-
Characteristics and evolution of a dynamic prograding continental margin: the late Neogene Giant Foresets Formation, northern Taranaki Basin, New Zealand
… and development of the modem continental margin in northern Taranaki Basin. The dynamic evolution of this formation is fundamentally linked to a Pliocene-Pleistocene increase in sediment flux sourced from South Island, to extensional graben formation in northern Taranaki Basin, to flexural …