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.
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Showing 1 to 20 of 217 for “"Outcrops"”.
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Thermocline Circulation Driven at Surface Outcrops of Isopycnal Surfaces
… wind stress and buoyancy fluxes at surface outcrops of isopycnal surface are translated into PV fluxes. The PV flux condition so derived considers seasonal movement of the isopycnal outcrops and geostrophic turbulence.</p> <p>A constant layer depth model, forced by the above flux condition, …
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Foraminifera from outcrops of the Pierre Shale (Upper Cretaceous) of North Dakota
… corners of the State. More scattered outcrops occur along Beaver Creek and the Missouri River near Linton, Emmons County, and the valleys of the James River near Jamestown, Stutsman County and the Sheyenne River in Benson, Eddy, Nelson, Griggs, Steele, Barnes, and Ransom Counties. A …
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Sessile Invertebrate Colonization on Rocky Outcrops at Gray's Reef National Marine Sanctuary
… development for fourteen months at four rocky outcrops at Gray’s Reef National Marine Sanctuary (GRNMS) to address the predictions that (i) developing sessile invertebrate communities in this system do not exhibit a predictable pattern of succession and (ii) recolonization patterns for small …
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Rock Outcrops in the Canadian Shield: an Investigation of Contaminant Transport From Surface Sources in Fractured Rock Aquifers
… in fractured rock aquifers with low lying rock outcrops is a largely unexplored area of study in hydrogeology. The purpose of this thesis is to examine these topics in an agricultural area in Eastern Ontario. The study consists of a regional scale groundwater quality study, an infiltration …
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Geometry, evolution and scaling of fault relay zones in 3D using detailed observations from outcrops and 3D seismic data
A new surface attribute was developed during the course of the thesis, which enables fault-related deformation – specifically, the apparent dip of mapped horizons measured in a direction perpendicular to the average strike of a fault array (here termed “fault-normal rotation”, or “FNR”) – to be …
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Natural processes in the degradation of open-air rock-art sites: an urgency intervention scale to inform conservation.
… terms of conservation – representative engraved outcrops. Since more than one thousand outcrops with rock-art still subsist today, it would be impossible to examine them all. Therefore, a sample comprising outcrops that possess most, if not all, of the variables that might affect stability and …
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SEED BANK DYNAMICS WITHIN A METAPOPULATION FRAMEWORK: A STUDY OF AN ANT-DISPERSED SPECIES
… <p><strong>Location. </strong>Granite-gneiss outcrops within mixed hardwood-conifer forest in Michigan, USA<strong></strong></p> <p><strong>Methods. </strong>We studied the distribution of the <em>Capnoides sempervirens</em> seed bank on outcrops and within the forest matrix in relation to …
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Transitional Facies and Sequence Stratigraphic Complexity of Shallow-Marine Star Point Formation to Coastal-Plain Blackhawk Formation Along Depositional-Strike, Wasatch Plateau, Utah
… is poorly documented. In the Cretaceous outcrops of Utah, Star Point and Blackhawk Formations are well studied. The nature of spatio-temporal transition of these two Formations, in the deposition-strike orientation, remains undocumented. This study characterizes facies and stratigraphic …
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The marine geology of Walker Bay, off Hermanus, SW Cape, South Africa
… Facies 1 consists of Bokkeveld Group rock outcrops with relatively high relief, occupying approximately 45 percent of the study area. Facies 2 represents similar outcrops but with low relief and partially covered by a thin veneer of unconsolidated sediment, including localized occurrences …
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Subsurface Analysis of Mississippian Tripolitic Chert in Northwest Arkansas
… of Mississippian age rock allows for access to outcrops in close proximity to gas wells that encounter subsurface Mississippian strata. Many outcrops found in Northwest Arkansas expose Lower Mississippian (Kinderhookian-Osagean) strata that represent a full third order transgressive/regressive …
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Architecture of fluvio-deltaic sandbodies: the Namurian of Co. Clare, Ireland, as an analogue for the Plio-Pleistocene of the Nile Delta
… on the Upper Carboniferous (Namurian) coastal outcrops of Co. Clare produced detailed measurements of facies distributions and bed geometries, which, together with sedimentary logs, palaeocurrent studies and outcrop-scale photomontages, enabled interpretation and quantification of channel …
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Lichens Of Ultramafic Rocks: A Multidisciplinary Approach To Understanding The Ecology Of An Understudied Organism In A Well-Studied System
… biotas of eight ultramafic and eight sandstone outcrops along a 70 km maritime influence gradient in order to test three hypotheses: 1) a substrate effect hypothesis that saxicolous lichen communities of ultramafic and sandstone outcrops are compositionally distinct; 2) a maritime gradient …
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Anatomy of a Carboniferous transgression: upper Tullig Cyclothem, County Clare, Ireland
… have been achieved by examination of all the outcrops of the transgressive upper Tullig cyclothem in County Clare, which show considerable lateral variation from north to south. One complete section of the transgressive Tullig is exposed at Trusklieve, where the sedimentary infill begins at …
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Karst water studies and environment in West Malaysia
… and karst water properties of selected limestone outcrops in Selangor, the Kinta Valley and the North-west region, West Malaysia. The meso-topography, soil and vegetation cover of 13 plots, which encompass the range of weathering environments observed in the limestone hills, are described. Reports …
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Ground-Based Hyperspectral Imaging and Data Analysis for Near-Vertical Outcrop Surfaces
… an adequate viewing angle for near-vertical outcrops which often provide excellent opportunity for detailed observations. Thus, there has been an increasing interest in hyperspectral data collected from ground-based platforms for studying near-vertical rock exposures. The purpose of this …
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The Vegetation and Restoration Potential of the Arid Coastal Belt Between Port Nolloth and Alexander Bay, Namaqualand, South Africa.
… series. The dune landscape is interrupted by outcrops of bedrock, such as river canyons (Holgat River); inselbergs (Buchu Twins); and koppies. Gravel plains and rocky outcrops cover much of the area on the south bank of the Orange River, as far south as Cape Voltas. The low rainfall.
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Structural Geology of The Brady Mountain Area, Ouachita Mountains, Arkansas: Integrating Field Mapping, Geospatial Techniques, Photogrammetry And 3D Modeling For Structural Analysis
… from one another by cultivated flood plains. Outcrops appear sparse but are numerous along the stream bottoms, creeks and along many road cuts, with significant exposures of predominantly Ordovician formations.</p> <p>The sequence consists of fine-grained clastic units, including the shales of …
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High-Resolution Correlation of a Time-Bounded Unit of the Pisco Formation, Peru
… sediments decrease from the northern outcrops to the southern outcrops, suggesting a decrease in energy levels and an increase of water depth away from the shore. This study provides the first secure correlation across a significant distance and a more comprehensive stratigraphy and …
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The possibility of an impact-related origin of quasi-conglomerate pseudotachylytes on Barra, Outer Hebrides, Scotland, an integrated study
… of the pseudotachylytes. On the macro scale, outcrops in one square kilometre were mapped using a colour code for the pseudotachylyte mode of occurrence. Pseudotachylyte veins, networks and quasi-conglomerates were distinguished. Meso scale maps covered 10 x 10 cm, 30 x 30 cm or 1 x 1 m and …
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REGIONAL STRESS REGIME STUDY OF EAST TEXAS BASED ON ORIENTATION OF FRACTURES IN THE WECHES FORMATION
… and analyzed using data obtained at various outcrops. This data was used to infer information about the regional stress regime based on the direction of maximum/minimum horizontal stresses (SHmax / SHmin) that formed the fractures. This is based on the principle that systematic, steeply …
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