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 25 for “"Burial depth"”.
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Ultrahigh-resolution paragenesis of the Cambrian-age Mt. Simon Sandstone at a burial depth of 1.8-2.1 km, Illinois basin, USA
… overgrowth cements were formed at a maximum burial depth of no more than 2.4 km and maximum burial temperatures greater than 100°C during the late-Paleozoic to early-Mesozoic (Fishman 1997). The modern formation waters have 87Sr/86Sr analyses that more radiogenic than younger Paleozoic strata …
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Burial of Short Cylinders Induced by Local Scour and Bedform Migration Under Waves Plus Currents
Experiments were conducted to study burial of cylinders placed on a sandy bed under combined waves and currents. The burial of a short cylinder was determined by local scour around the cylinder and by a more global process associated with the presence of ripples and sandwaves. The role of bedform …
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Behaviour of buried pipes adjacent to ground voids under dynamic loading
… recorded in the pipe wall. Increasing the pipe burial depth contributed to significant reductions in the soil surface settlement, pressure recorded at the pipe crown and invert, pipe deformation and strain recorded in the pipe wall. However, the void presence limited the contribution of …
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The response of a suction anchor group to various applied loadings.
… on single anchors, of two geometries, at burial depths up to 11.3 times anchor diameter. It is shown that for a given geometry of model anchor and suction pressure a common relationship exists between uplift load and relative movement curves with burial depth, from which it can be shown …
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Vehicle Shaping for Mine Blast Damage Reduction
… effects of changes in target height and charge burial depth are also examined. Testing was conducted on dihedral target plates using 0.636 gram charges. These were buried in saturated sand at three depths, and shaped targets were placed at four heights above the surface. The impulse applied to …
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Seed ecophysiology and plant population ecology of Cynoglossum officinale L. and Tragopogon spp.
… with 15 C as the optimumin both weeds. A seed burial study showed that increased seeding depth had no effect on seed germination, but reduced seedling emergence. These results suggest that seeds in Tragopogon spp.can germinate in darkness and the reservoir of non-dormant seeds will become …
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Live Oak (<em>Quercus virginiana</em>) Recruitment and Seedling Survivorship in a Southern Maritime Forest
… transplantation, as well as the effects of burial depth on seedling recruitment. Live oak (<em>Quercus virginiana</em>) was the species utilized for this study. Restoration methods were compared in Kenan Field on Sapelo Island, Georgia during the winter and autumn of 2003. One hundred fifty …
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Numerical simulation of viscoelastic buckle folds: Implications for stress, fractures, porosity and fluid flow
… to the single layer fold. It is concluded that burial depth, viscosity, and permeability are critical for the initiation of major fracture sets at the hinge zone with varying degrees. Moreover, this study provides a detail research on the stress and strain distribution in the multilayer folds …
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Diagenesis of the B chalk, B marl, and Fort Hays member of the Niobrara Formation, Denver Basin, Colorado
… diagenetic alteration occurred with increasing burial depth and increasing temperatures. Cathodoluminescence petrography, scanning electron microscopy, geothermal data, and stable oxygen isotopes provided insight into the varying diagenetic changes that have occurred. An increase in temperature …
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Ground movements during tunnelling in sand
… the face. Tests were preformed at four different burial depths in dry sand, corresponding to cover depths of 0.5, 1, 1.5, and 2 times the tunnel diameter. These results indicate that the face pressure at failure is largely independent of burial depth over the values tested. The ground deformation …
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Fluid Budget of Metasedimentary Rocks from a Tertiary Accretionary Prism and Connections to Seismicity, Olympic Peninsula, Northwest Washington State
… and mudrock that were buried to 6–15 km. This depth range intersects the 10–50 km depth range of ETS events. My objectives are to quantify the water flow recorded in rocks of the Olympic Peninsula via petrographic, whole rock, and isotopic analyses to test the prediction that water release …
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Germination niche of an emergent invasive grass, Arthraxon hispidus
… Finally, emergence greatly decreased with burial depth. Emergence occurred at ≥ 43% at 1 - 2 cm, decreasing to 5% at 6 cm, and 0% at 8-cm depths. With adequate soil moisture, a broad range of germination temperatures, and a decreased emergence rate with depth, we believe A. hispidus is …
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Drivers of Spatial Dispersion and Residence Time of Coarse Sediment in Gravel-Bed Rivers
… form. Travel distance is not correlated with burial depth. However, since residence time is related to vertical mixing and correlated with travel distance through virtual velocity, it may be a key factor linking streamwise and vertical dispersion.
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Identification of a thermal maturation high, revised maturity map, and production trends of the Late Devonian Duvernay Formation, Alberta, Canada.
… data, produced fluid types, and the structural burial depth trends across the basin. Thermal maturity across these areas increases to the southwest except for Willesden-Green. The southern portion of the Innisfail region reaches oil maturity whereas Kaybob ranges from oil to gas mature. …
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Transient modeling of host rock for a deep borehole nuclear waste repository
… was found to be negligible in comparison to the depth of the repository. The second configuration included a semi-infinite array of boreholes. This representation is a more realistic approximation of an actual repository, since it includes the modeling of the undisturbed rock surrounding the …
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Stratigraphy, sedimentology, and diagenetic history of the Siluro- Devonian Helderberg Group, central Appalachians
… but most cements formed under shallow (<300 m depth) to deep burial (300 m to 4 km) conditions. Regional cathodoluminescent zonation patterns in early, clear calcite cements indicate meteoric groundwaters, that become progressively more reducing away from recharge areas, were involved in …
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A Study of Compaction and Cementation of Sandstones in the Athabasca Basin, Northern Saskatchewan, Canada, and Implications for Uniformity-related Uranium Mineralization
… at elevated temperature (>200℃) and deep-burial (5-7 km) conditions under normal geothermal conditions. However, a recent study invoked that the URU mineralization may have occurred at a relatively shallow burial depth (<3 km) and alternatively interpreted elevated temperatures (>200℃) …
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A Mortuary Analysis of the Structure 7 Cemetery at Town Creek, a Mississippian Site in the Piedmont of North Carolina
… and the spatial analysis of the distribution of burial attributes that include burial depth, age, sex, grave goods, body positioning and body orientation, I identify five spatially discrete groups within the Structure 7 cemetery. I argue that these five groups represent smaller social groups …
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Petrography and Diagenesis of Cambrian Dolomite in Tabei Uplift, Northern Tarim Basin, China
… from slightly evaporative environment; 2) burial dolomitization, produced the crystalline dolomite with different crystal size and shape at different burial depth (Types 2, 3 and 4 dolomite) by high salinity fluids with rising temperature; and 3) hydrothermal dolomitization, produced only …
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The Analysis Of Preserved And Degraded Human Skeletal Material: Understanding Relationships Between Bone And The Soil Environment
… that soil interred human bone has with the burial environment has implications for the survival of the organic and inorganic components, including collagen and DNA. The study of both the Chapel House Farm Medieval cemetery, Poulton, Cheshire, UK, and contemporary skeletal remains from …
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