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Showing 1 to 18 of 18 for “"Glacial Sediments"”.
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Correlation of Glacial sediments Using Heavy-Minerals Assemblages
<p>An optical study of the heavy minerals of the till in two lithostratigraphic units in Polk, Red Lake, and Norman Counties in northwestern Minnesota was undertaken. The purpose was to determine whether the assemblages are different enough to differentiate the two tills and whet her the …
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The Causes and Implications of Microstructures in Glacial Sediments
… examines how microstructures in glaciogenic sediments reflect the processes forming them, and how these microstructures then affect the conditions around them, through a series of field studies, laboratory tests, models, and statistical analyses. Following literature reviews, a deformational …
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Heavy minerals of glacial sediments in the area of Red Lake Falls, Minnesota
Pleistocene lithostratigraphic units containing glacial sediments in the Red Lake Falls, Minnesota, area and adjacent areas were studied to determine their heavy-mineral assemolages. Seventy-two samples of fine sand were studied by optical grain-count methods and 77 samples of fine sand were …
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Pleistocene geology of the Grand Forks-Bemidji area, northwestern Minnesota
… in age from Pleistocene to Holocene and include glacial, glaciofluvial, lacustrine, bog, eolian, and alluvial sediments.</p> <p>Sixteen power-auger test holes, two measured sections along the Red Lake River, two composite sections from earlier drilling pro grams and surface exposures were used to …
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Seafloor geology, deglacial history, and early post-glacial evolution of eastern Juan de Fuca Strait
… the stratigraphy in terms of the latest deglacial episode and associated sealevel change. The surficial geologic units comprise bedrock (unit 1), ice-contact diamicton (unit 2), glacial-marine sediments (unit 3), and post-glacial sediments (unit 4). Bedrock crops out near Vancouver Island, …
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Characterisation and Spatial Variability of the Magnetic and Electrical Resistivity Geophysical Properties of the Soils of Counties Kildare and Wicklow, Eastern Ireland.
… The correlation between lf and geology and glacial sediments is very weak (0.08). There is however, a good correlation between lf and soils. A strong positive correlation exists between resistivity and topography and soils. Correlation between resistivity and geology and glacial sediments …
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Applicability of a delta portable XRF spectrometer for determining geochemistry of glacial sediment samples collected in the Canadian Western Arctic
… The Delta pXRF was also used to analyze 20 glacial sediment samples from the Canadian Western Arctic for select elements. The results were compared with three conventional laboratory digestion methods. Comparison showed the Delta pXRF produced results most similar to total and near-total …
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A Conceptual Model for the Development and Persistence of Soap Holes (Unique Prairie Groundwater Discharge Features)
… as localized areas of water-saturated, weak sediments which render farmland uncroppable and hazardous. The formation mechanisms and global distribution are largely unknown, despite being inferred as groundwater discharge phenomena on the Alberta prairies over 50 years ago. Here, the first …
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The Pleistocene History of the Birmingham District
… a complex sequence of Middle to Late Pleistocene sediments attributed to at least three lowland glaciations (Anglian, Wolstonian, and Devensian) as well as a variety of non-glacial sediments. Understanding the age of the Pleistocene glacial deposits is critical to reconstructing the …
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Modern sedimentation in the Northern Barents Sea : input, dipersal and deposition of suspended sediments from glacial meltwater
… are often observed indicating that fine grained sediments are being transported under present conditions. Minor additional sediment is supplied by iceberg rafting englacial material and sea-ice containing aeolian, resuspended, and beach sediments. Glacial flour is supplied by several large stable …
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Hydrogeologic Characterization of a discharge wetland in northeastern Grand Forks County, North Dakota
… decreased agricultural production in the central glacial Lake Agassiz plain of North Dakota. Saline discharge occurs in a belt of ephemeral wetlands in the lake plain. The physical and chemical hydrology of .the Lunby-stewart saline discharge wetland were investigated in order to provide …
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Applying a Systems Approach to the Legacy of Lead in Soil
… of a field study exploring the use of excavated glacial sediments mixed with compost as a safe growing medium in urban community gardens. This CSB research created the foundation for numerous follow-up studies and efforts aimed at limiting soil Pb exposure and promoting the many benefits of urban …
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Stratigraphy of offshore sediment of Lake Agassiz, North Dakota
… Sherack, Wylie, and Argusville Formations. The glacial sediments underlying the Lake Agassiz sediment provide a suitable foundation for nearly all types of construction.</p>
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Glacial stratigraphy of northwestern Cass County, North Dakota
… describe, and correlate the Late Wisconsinan glacial sediments of northwestern Cass County, North Dakota and to interpret the glacial history of the area.</p> <p>The surficial geology of the area was interpreted as: 1) collapsed glacial sediment, 2) glacial sediment draped over pre-existing …
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Temporal Dynamics of Groundwater Flow Direction in a Glaciated, Headwater Catchment
… wells, screened from 2.4 - 6.9 m depth within glacial sediments of the C horizon. I conducted 47 slug tests across the well network to determine hydraulic properties of the aquifer materials surrounding each well. In addition, our team conducted a large-scale auger investigation mapping soil …
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Supercontinents and glaciation: a perspective from western Gondwana.
… sedimentary record is the preservation of glacial sediments. Significant debate has centred around firstly whether these deposits are in fact glacial and secondly the spatial extent of these glaciations. This thesis addresses these deficits in our knowledge by presenting detailed …
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Holocene sedimentary history of Chilliwack Valley, Northern Cascade Mountains
… Lake has effectively trapped the entire post-glacial sediment load from the upper catchment (area = 334 km2), allowing to compare this "nested" system with the larger catchment. Rates of lake sediment accumulation are estimated using sediment cores and paleomagnetism. These are compared with …
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Intermontane valley fills
… for estimating the spatial distribution of post-glacial sediments that are stored in the entire European Alps. A comparison with data from exploratory drillings and from geophysical surveys revealed that the model reproduces the measurements with a root mean squared error (RMSE) of 70m and a …