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Showing 1 to 9 of 9 for “"geologic controls"”.
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Geologic Controls of Base-Flow of Mountain Streams in Northern Nevada
Made available in DSpace on 2014-12-04T19:14:25Z (GMT). No. of bitstreams: 1 6402879.pdf: 3731017 bytes, checksum: 6bb8b8dffcf059659b8ac865a12bc6b2 (MD5) Previous issue date: 1963
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Geologic controls on mass movement in the New River Gorge, West Virginia
Geologic factors, such as bedrock lithology, joints, lineaments, and attitude of bedding were analyzed and evaluated for influences on mass-movement in the New River Gorge. Mass-movement deposits were mapped at a 1:24,000 scale in three study areas within the gorge and a Geographic Information …
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Antecedent Geologic Controls on the Distribution of Oyster Reefs in Copano Bay, Texas
… the distribution as well as investigate the controls on the distribution of oyster reefs, a geophysical survey of Copano Bay was conducted in June and July 2007. Surficial sediment analysis confirms that the recent sedimentation in Copano Bay is comprised of mostly estuarine mud with little …
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A Gis Investigation of Regional Geologic Controls on Mercury Deposits in the Southwest Region of Arkansas
… (GIS) tools provided insight to the regional controls on the spatial distribution of the mercury deposits by examining the proposed relationships between mercury deposits and regional faults or changes in lithology, both of which have been suggested (Clardy and Bush, 1976) to explain the …
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Examining Pathways for Water Loss from Mountain Lake, Giles County, Virginia
… the pathways for water loss and the possible geologic controls on these flow paths. Continuous lake level monitoring data show seasonal trends of draining and filling over a three year period. Electrical resistivity profiles suggest the presence of a large low-resistivity zone beneath the …
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The Use of Radionuclides to Identify Vulnerable Fractured and Karst Bedrock Aquifers in Eastern Ontario
… fractured and karst bedrock aquifers using geologic and geochemical data. A novel methodology is presented that evaluates ¹³⁷Cs and ²¹⁰Pbₑₓ as local indicators of groundwater vulnerability. The method is designed to determine the vulnerability of a specific well. Suspended sediment samples …
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Morphodynamics of large anabranching rivers : the case of the Madeira River, Brazil
… among different channel structures, while geologic controls play an important role in a number of places that result in channel deepening and suspension of channel migration. The three reaches are dominated by nearly upright banks, which makes the channel width stay constant with increasing …
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Physical Investigation of Field Scale Groundwater Recharge Processes in the Virginia Blue Ridge Physiographic Province
… adjacent to the fault plane appear to serve as geologic controls that preferentially direct infiltrated meteoric water to a deeper confined aquifer. The structural competence of the granulite gneiss thrust fault hanging wall appears to act as a barrier to deeper groundwater recharge, causing the …
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Faulting and natural fracturing across the DJ Basin: impacts on production from Hereford field, northern Colorado
… be a viable play. Therefore, understanding the controls on fracture distribution and how fractures contribute to production is essential for conducting economic operations across the region. The B Chalk is not the only target reservoir in this area, however. The Codell Sandstone is also a viable …