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Showing 1 to 9 of 9 for “"Appalachian Valley and Ridge"”.
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Kinematics of detachment folding, Appalachian Valley and Ridge, West Virginia
This study assesses the geometry and kinematics of a fold at the east edge of the Nittany Anticlinorium, Appalachian Valley and Ridge Province, West Virginia. Regional deformation consists of minor to major folds within two vertically stacked thrust sheets. Geometric analysis of a first-order fold …
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Field based study of thrust faults in the Appalachian Valley and Ridge Province Newport, Virginia
… on a series of thrust sheets exposed in the Appalachian Valley and Ridge Province Blacksburg-Pembroke area in southwest Virginia. Structures in the hanging wall of the Saltville thrust (Saltville thrust sheet) and the footwall of the Saltville thrust (Narrows thrust sheet) are examined. The …
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Graphical and digital slope stability analyses for Giles County, Virginia
… maps are useful in seismic hazard evaluation, land use and emergency planning, and geomorphological studies. Such maps were generated for Giles County, Virginia (approximately 1000 square km) by the synthesis of data sets for topographic slope, surficial deposits, geologic structure, and seismic …
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Geology of the Spruce Run Mountain area, Giles County, Virginia
… of Giles County. It lies wholly within the Appalachian Valley and Ridge Province. The rocks exposed in the Spruce Run Mountain area range in age from Middle Cambrian to Lower Devonian. All the rocks are sedimentary rocks deposited in a marine environment and have an aggregate thickness of …
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A seismic reflection study over the Bane anticline in Giles County, Virginia
… of sedimentary rocks in this part of the Appalachian Valley and Ridge province. Eleven seismograms were obtained. In addition to frequency filtering, velocity filtering, and deconvolution, new methods of interpreting RMS velocity analyses were developed and applied. Persistent events at …
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Kinematic analyses of discfolds in Devonian Millboro Formation in the Central-Southern Appalachian junction zone
… Devonian Millboro Formation in the junction zone and adjacent, differently trending segments of the Central and Southern Appalachian Valley and Ridge Province. Types and kinematic signatures of shearing movements that produced discfolds at twenty localities have been recognized. Discfolds are a …
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Erosional history of the New River, southern Appalachians, Virginia
Much of the bedrock surface of the Southern Appalachian Valley and Ridge Province is covered by a veneer of surficial deposits classified as alluvium, colluvium, and residuum. In this investigation the surficial geology of a 60-km<sup>2</sup> area of the New River drainage system was mapped at a …
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Understanding Non-Plume Related Intraplate Volcanism
… explained by plate tectonic processes, and thus is still a missing piece in the understanding of the dynamics and evolution of our planet. Models for the formation of intraplate volcanism are dominated by mantle plumes, but alternative explanations, such as adiabatic decompression …
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Influence of geology on the water resources of the Upper Roanoke River Basin, Virginia
… Roanoke River Basin contains Precambrian Blue Ridge Complex rocks and 15,000 feet of Paleozoic sedimentary rocks in a complexly folded and faulted structural framework. Three geohydrologic units were identified--Precambrian and Ordovician metamorphics and elastics, Cambrian and Ordovician …