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Showing 1 to 20 of 25 for “"Sediments (Geology)"”.
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Micromorphology of Last Glacial Maximum Grounding line sediments around the Antarctic Peninsula
Sediments recovered from seven Last Glacial Maximum grounding lines sites, around the Antarctic Peninsula, were analyzed using micromorphology. This is the first evidence that grounding line sediments from around the Antarctic Peninsula have complex deformational histories and subglacial origins. …
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Palynology of late-glacial and postglacial sediments in Georgian Bay, Ontario, Canada, as related to the Great Lakes history /
… and other palynomorphs in Georgian Bay bottom sediments and a comparison of these data with the contemporary vegetation, (2) the relative significance of fluvial transportation of pollen and spores, and (3) the late- and postglacial history of vegetational and climatic changes in the Georgicin …
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Abrasion, transport and distribution of sediment in selected streams of Southern Ontario and Western New York /
The rate of decrease in mean sediment size and weight per square metre along a 54 km reach of the Credit River was found to depend on variations in the channel geometry. The distribution of a specific sediment size consist of: (1) a transport zone; (2) an accumulation zone; and (3) a depletion …
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Għadira sands as compared to normally consolidated deposits at Marsa (Ta’ Ċeppuna) : using static triaxial tests
The results from an experimental study on Għadira clean sands and Marsa alluvial deposits are being presented. A series of nine undrained triaxial compression tests were performed on these soils, at three different confining pressures, ranging from 55 to 1200kPa for clean sands, and 200 to 800kPa …
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Textual characteristics of coarse sediments in selected streams of the Niagara Peninsula, Ontario
… are paved by coarse carbonate and sandstone sediments which have originated from the escarpment units and can be traced downstream from their source. Fifty-nine sediment samples were taken from five streams, over distances of 3,000 to 10,000 feet (915 to 3050 m), to determine downstream …
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Geology and Petroleum Potential of the Hay Creek Anticline, North-Central Oregon
<p>For many years it has been reported that the core of the Hay Creek Anticline exposes metamorphic rocks of Paleozoic or Mesozoic age. On closer study it was found that these rocks consist of only slightly metamorphosed black to dark grey siltstones and sandstones with less abundant chert pebble …
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Thermal history model of the Williston Basin
… of deposition and diagenesis of the overlying sediments. The temperature of the Bakken Shale increased slowly in its early history but rapidly in its late history. </p><p> Analysis of the thermal history of a sedimentary basin must consider the following: 1. time, temperature, and depth …
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The postglacial sedimentology of Devils Lake, North Dakota
<p> The present sedimentary environment of Devils Lake, a Closed brackish lake in northeastern North Dakota, was investigated, and changes in the Holocene lacustrine environment are interpreted. Sediment samples from Main Bay of Devils Lake were analyzed for their physical, chemical and mineral …
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Paleocurrent Analysis of the Cretaceous Mitchell Formation, North-Central Oregon
… gross lithology my work reconfirms that these sediments are part of a sub-sea fan complex consisting of fan-apron-facies turbidites and mudstones (Hudspeth mudstone facies) and channel-facies conglomerates and sandstones (Gable Creek sandstone-conglomerate facies). Sole marks, flute casts, …
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Deflation basin stratigraphy: southwestern North Dakota
… of a similar depositional sequence for sediments from a number of shallow basins in southwestern North Dakota and the comparison of this sequence with other work either in the area or in similar geographic environments. </p><p>Samples were obtained by augering, coring, and trenching …
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Stratigraphy, sedimentology, and depositional environments of the Hell Creek Formation (Late Cretaceous) and adjacent strata, Glendive area, Montana
<p>The Colgate Member (Fox Hills Formation), Little Beaver Creek, Marmarth, Bacon Creek, Huff, and Pretty Butte Members (Hell Creek Formation), and lower Ludlow Formation in the Glendive area, Montana consist of sandstone, sandy siltstone, shale, and lignite. The Colgate is 24 m thick and consists …
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The sedimentology of the Bloomington fan complex: an element of the Oak Ridges Moraine, Southern Ontario
… flows, and glaciolacustrine and glaciofluvial sediments exhibiting north and northwesterly paleocurrents. Continued advance of the southern ice, overriding the fan complex, ii produced large-scale glaciotectonic deformation structures, and deposited the Halton Till. The subaqueous fan …
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Sedimentology and micromorphology of drumlin sediments at Chimney Bluffs State Park, New York, United States of America
The drumlin sediments at Chimney Bluffs, New York appear to represent a block-inmatrix style glacial melange. This melange comprises sand stringers, lenses and intraclasts juxtaposed in an apparently massive diamicton. Thin section examination of these glacigenic deposits has revealed …
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Contaminant migration of oil-and-gas drilling fluids within the glaciated sediments of north-central North Dakota
… of drilling fluids in glaciofluvial sediments is not recommended. The study at the Winderl site is evidence of the adverse environmental impact such disposal can lead to. The impact of drilling fluid disposal in till is dependent upon the geologic setting. Migration of the drilling …
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Correlation of Electron Donor Concentrations in Sediments with Sediment Properties: New Providence, Iowa
The concentrations of electron donors in aquifer sediments are important in understanding the fate and transport of redox-sensitive constituents in ground water, such as nitrate. In this study, 50 sediment samples were collected from below the water table from 11 boreholes at the US Geological …
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Impact of pollution sources of microplastics and associated microbial populations in surface water
Submitted in fulfilment of the academic requirement for the degree of Masters in Applied Sciences: Biotechnology, Durban University of Technology, Durban, South Africa, 2024.
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Cyclically-Forced Hyperpycnites of the Ancient Colorado River Proximal Prodelta
<p>Prodeltaic deposits record a distal, minimally reworked archive of dominant processes active at the fluvial-marine interface. The Fish Creek-Vallecito Basin (CA, US) preserves an ~3 km-thick, lower Pliocene, progradational deltaic succession formed when the ancestral Colorado River infiltrated …
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