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Showing 1 to 12 of 12 for “"Quartzitic"”.
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Micro-Scale Characterization of Quartzitic and Carbonate Sand Grains Using Nanoindentation
… structure and are more compressible compared to quartzitic sand grains which are abundant in alluvial depositional environments. Consequently, there is a stark difference in material behavior of carbonate sands and it is difficult to characterize this distinct behavior with conventional methods. …
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Deformation associated with Pulaski overthrusting in the Price Mountain and East Radford windows, Montgomery County, southwest Virginia
… zone, a suite of carbonate breccias, cataclastic quartzitic rocks and deformed shales occur. The rocks of the décollement comprise a thrust chaos and tectonic mélange. Mélange and chaos fabrics are typified by folding, faulting and cataclasis. The East Radford window exposes a complexly folded and …
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Liquefaction Susceptibility of Uncemented Calcareous Sands From Puerto Rico by Cyclic Triaxial Testing
… sand was less susceptible liquefaction than quartzitic sands of the same relative density remolded and tested under similar conditions.
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A comparative study of metamorphosed supracrustal rocks from the western Namaqualand metamorphic complex
… classified into seven major lithological groups: quartzitic rocks, metapelitic and metapsammitic rocks, quartzo feldspathic rocks, metabasites, metacarbonate rocks, magnesium-rich cordierite rocks and iron formations. Further subdivision, based on variations in mineral constituents within each …
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Groundwater management using a GIS case study : Uitenhage Subterranean Government Water Control Area
… basins in South Africa. The Table Mountain Group quartzitic sandstones are overlain by a thickness of postPalaeozoic sediments giving rise to artesian groundwater. The most wellknown of this manifestation are the springs at Uitenhage which have been used since pre-historic times and are currently …
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The vegetation of Swartboschkloof, Jonkershoek, Cape Province, South Africa
… 285 m and 1200 m and the soils are derived from quartzitic Table Mountain Sandstone and porphyritic Cape Granite. Using the Braun-Blanquet phytosociological method, vegetation and environmental data were collected at 201 relevés throughout the study area; 101 of these relev~s are correlated with …
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The influence of various South African aggregates on the creep of concrete
… following order of influence: Eastern Province Quartzitic Reef Quartzite, Hornfels, Granite and Dolerite.
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The geological evolution of the eastern Richtersveld
… Hoop Subgroup) overlain by and intercalated with quartzitic metasediments into which the mainly granodioritic rocks of the Vioolsdrif Intrusive Suite (VIS) were emplaced. Metavolcanics and sediments of the De Hoop Subgroup have been subdivided into formations, and their paleogeographic …
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Chemical characterisation of landfill leachate and its potential mobility through the Cape Flats sand
… was classified as an aeolian, calcareous, medium quartzitic sand with negligible organic carbon content. Extreme clay-depletion would render the soil almost incapable of leachate attenuation, although calcite and aragonite, found by X-ray diffractometry, would impart a significant pH buffering …
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Improving the performance of cold bituminous emulsion mixtures (CBEMs) : incorporating waste
… investigation were carboniferous limestone and quartzitic asphalt sand. But in response to environmental conservation campaigns, a range of selected waste materials were also tested as partial and full replacement to the virgin mineral aggregates, including: pulverized fuel ash (PFA), red …
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Relating concrete cube, core and cylinder compressive strengths that are cast, cured, prepared and tested in laboratory conditions
… and two aggregate types, namely greywacke and quartzitic sandstone. An additional two mixes of high strength concrete were created (60 and 75 MPa) using 19.2mm greywacke aggregate. The compressive tests involved a 100 mm cube, three diameter cylinders (70, 100 and 150 mm) and four core diameter …
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Denudation processes in a tectonically active rift on different time scales
… is based on cosmogenic nuclide (10Be) dating of quartzitic deltaic sands that were deposited in the northern Kenya Rift during a highstand of Lake Suguta, which was associated with the Holocene African Humid Period. Taken together, my new results document the role of climate variability in …