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 765 for “"depositional"”.
-
Magnetic Characteristics of Carboniferous Continental Depositional Systems: Implications for the Recognition of Depositional Hiatuses
… magnetic patterns that are characteristic of the depositional, post-depositional, and/or diagenetic environment. Analyses of multi-parameter magnetic experiments conducted on upper Mississippian and lower Pennsylvanian continental successions reveal that distinct depositional, pedogenic, and …
-
Depositional history of the Elmont limestone
Call number: LD2668 .T4 1963 R44
-
Depositional history of the Elmont limestone
Call number: LD2668 .T4 1963 R44
-
Post-depositional structural changes in clay sediments
… sediments are considered and the ability of the depositional environment to affect these properties is assessed. From a SEM analysis of mudrocks it is shown that there is a correlation between microstructure and the conditions at the time of deposition. organic-rich shales formed in anoxic …
-
Depositional processes in Saldanha Bay and Langebaan Lagoon
… basis of detailed textural investigations the depositional history of the study area has been established. The sediments in the bay and in the lagoon consist of a fine terrigenous quartz population and a coarser skeletal carbonate population, which have been mixed in various proportions. In …
-
Petrography and Depositional Environment of the Sparland Cyclothem (Pennsylvanian)
Made available in DSpace on 2014-12-09T20:34:08Z (GMT). No. of bitstreams: 1 6406105.pdf: 4444110 bytes, checksum: f744d1c0741c108f1f13c9c205f2469b (MD5) Previous issue date: 1963
-
Modeling the dynamics and depositional patterns of sandy rivers
… of the dynamic nature, spatial organization and depositional record of topography in sand-bedded rivers. I examine patterns and processes over a wide range of scales, on Earth and Mars. At the smallest scale, ripples and dunes (bedforms) arise spontaneously under most natural flow conditions, …
-
Quantifying channelized submarine depositional systems from bed to basin scale
The challenges of directly observing active turbidity currents necessitates the consideration of preserved deposits for deciphering the behavior of these systems. In this thesis, I take advantage 3-D subsurface seismic data and outcrop exposures to study turbidites at scales ranging from bed to …
-
Late Quaternary Mississippi River Incised Valley Fill: Transgressive Depositional Packages
<p>A series of USACE atlas quadrangles and dee pborings from the USGS and LGS with radiocarbon dated peats were used to construct several regional crosssections and paleogeographic reconstructions. Late Pleistocene glaciation and consequent lowered sea leve lresulted in reentrenchment of the …
-
Fluvial Depositional Processes of a Tropical River, Colombia, South America
<p>Fluvial depositional processes along the Rio Magui in south-western Columbia are primarily controlled by localized uplift downstream of the mouth of the river, sediment sources that produce both coarse-and-fine-grained load, and numerous over-bank flows caused by torrential rainfall.</p>
-
Quantifying channelized submarine depositional systems from bed to basin scale
The challenges of directly observing active turbidity currents necessitates the consideration of preserved deposits for deciphering the behavior of these systems. In this thesis, I take advantage 3-D subsurface seismic data and outcrop exposures to study turbidites at scales ranging from bed to …
-
NETWORK THEORY IN ICHNOLOGY: FROM BEHAVIOURAL TOPOLOGY TO THE DEPOSITIONAL ENVIRONMENT
This study aims to (1) develop quantitative approaches for the study of ichnological systems; (2) model, for the first time, ichnosites as networks; (3) analyze the response of ichnological systems to global dynamics, with particular regard to Late Paleozoic fluvial-influenced settings. In this …
-
Depositional History of Thousand Acre Marsh From Geophysical and Sedimentological Analyses
… the shallow geologic framework and the recent depositional history of Thousand Acre Marsh. Analyses of these data revealed the role of Thousand Acre Marsh as a record keeper of subsurface sediments and the effects of adjacent environments, North Inlet Marsh system, Winyah Bay estuary, river …
-
The Tuscaloosa Marine Shale: Geologic History, Depositional Analysis, and Exploration Potential
… complexity of the study area and the formations depositional features. The data from these logs were used to analyze the structure of the shale unit to develop structural maps of the Lower Tuscaloosa Formation and the Tuscaloosa Marine Shale.</p> <p>The analyses of this study found that the …
-
Persistence of Depositional Features in a Strongly Seasonal, Tide-Dominated Delta
… x-radiography to observe fine scale changes in depositional characteristics on tidal channel banks, and subsampled for subsequent textural analysis. In more than half of the cores examined there is no change in the style of the laminations, suggesting that the processes controlling deposition …
-
Depositional environments and diagenesis, Interlake Formation (Silurian), Williston Basin, North Dakota
… main purpose of this study was to interpret the depositional and diagenetic history of the Interlake Formation. Approximately 2,400 feet of Interlake core and 300 thin sections were studied, The Interlake was then divided into twelve lithotypes representing deposition in low-energy sublittoral, …
-
Depositional Model of a Late Cretaceous Dinosaur Fossil Concentration, Lance Formation
… of deposition. This study aims to provide a depositional model for the bonebed. To accomplish this task we utilized 1D facies analysis of surrounding units and 3D analysis of the bonebed. The nature of the outcrop limited facies analysis to 1D. Four measured stratigraphic sections, each …
-
Numerical modeling of river migration incorporating erosional and depositional bank processes
Understanding the nature of morphologic changes of meandering rivers has long attracted the attention of the scientific community, in the fields of fluvial geomorphology, hydraulic engineering and river restoration. Several meander evolution models developed over the years have provided a deeper …
-
Analytical and statistical approaches toward understanding sedimentation in siliciclastic depositional systems
Recent studies of turbidite bed thickness distributions have demonstrated power law and other statistical distributions. Chapter 2 explores the different distributions which may express fan processes and may be used as a tool to classify environments. Chapter 3 illustrates a correlation between …
-
Depositional environments and diagenesis, Winnipegosis Formation (Middle Devonian), Williston Basin, North Dakota
… took place during six stages of diagenesis: syndepositional 1, eogenetic 1, telogenetic, syndepositional 2, eogenetic 2, and mesogenetic stages of diagenesis. Dolomitization is the major diagenetic process in Winnipegosis rocks. It has altered rocks from the pinnacle reefs and shelf-margin, …
Page 1 of 39