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Showing 1 to 20 of 25 for “"Saltville"”.
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Geology of the Saltville-Broadford area
The Saltville-Broadford area is largely on the northwestern limb of the Greendale syncline in the Valley and Ridge Province of Virginia. The area mapped covers 12 square miles of the northwest corner of Smyth County, Virginia. The rocks in the area ranging in age from Cambrian to Mississippian are …
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Biology of immature Culicoides variipennis ssp. australis (Coq.) (Diptera:Ceratopogonidae) at Saltville, VA
… variipennis inhabiting the brine ponds of Saltville, VA was studied. Developmental threshold temperatures (OC) and thermal constants (Odays) for larvae and pupae were 9.6OC and 387Odays (larval stage) and 9.6OC and 3OOdays (pupal stage) respectively. Accumulated heat units recorded in the …
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The Saltville thrust: investigation of a regional thrust fault in a foreland fold and thrust belt
… type of deformation are not well understood. The Saltville thrust, a major overthrust in the southern Appalachians, was investigated with respect to deformation mechanics. Thrust termination occurs in the overturned, northwest facing Sinking Creek anticline, at the juncture between the southern …
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The price of freedom: the battle of Saltville and the massacre of the Fifth United States Colored Cavalry
The battle of Saltville Va. (Oct. 3, 1864) and the subsequent massacre of wounded prisoners from the 5th United States Colored Cavalry has been a neglected and misinterpreted topic. The narrative follows the Federal advance from Kentucky to southwest Virginia including Confederate delaying actions. …
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Field based study of thrust faults in the Appalachian Valley and Ridge Province Newport, Virginia
… 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 first part of this study involves the construction of a series of thrust transport-parallel 1:24,000 scale geologic cross …
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Recovery status and chemosensory cues affecting reproduction of freshwater mussels in the North Fork Holston River downstream of Saltville, Virginia
… North Fork Holston River (NFHR) downstream of Saltville, VA declined from at least 24 species, as observed in 1918, to one species in 1974 due to mercury pollution. To determine the degree of recovery of mussels in the NFHR downstream of Saltville, and to provide recommendations for future …
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Survey of Health Effects among Residents Adjacent to a National Priority List Site in Ssouthwest Virginia.
<p>The Saltville Waste Disposal Site is a National Priority List site used during the 77- year operation (1895–1972) of an electrolytic chlorine and caustic soda plant. A cross-sectional study was conducted to determine disease prevalence among Saltville Medical Center (SMC) patients. Diseases …
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An Ecotoxicological Evaluation of the North Fork Holston River below Saltville, Virginia and Identification of Potential Stressors to Freshwater Mussels (Bivalvia:Unionidae)
… of the North Fork Holston River below Saltville, Virginia has nearly extirpated most mussel populations. Because natural recovery of these populations has not occurred, this research combined field and laboratory assessments to determine the extent of ecological impairment in the river. …
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Geochemical and Taphonomic Signatures of Freshwater Mussel Shells as Evidence of Mercury-Related Extirpations in the North Fork Holston River, Virginia
… from 5 sites, upstream and downstream of Saltville (where mercury was used from 1950-1972) were analyzed to test if: (1) geochemical signatures of shells record variation in mercury levels relative to the contamination source; and (2) shell taphonomy could be used to differentiated …
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Dammed If You Don't: The Palmertown Tragedy of 1924 in Collective Memory
… muck engulfed Palmertown, a small community in Saltville, Virginia. Houses were swept away and by the time all of the bodies were pulled from the wreckage, the death toll had reached 19-an immense loss for the tight-knit community. A dam, owned by Mathieson Alkali Works, loomed approximately 100 …
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Structural geology of the Christiansburg area, Montgomery County, Virginia
… to five fault blocks: the Max Meadows, Pulaski, Saltville, Salem, and Catawba blocks. The Max Meadows block contains only the Middle Cambrian Rome Formation, the oldest rocks exposed within the area. The parautochthonous Saltville block includes rocks from Upper Cambrian to Middle Ordovician in …
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Geology of the Big Walker Mountain-Crockett Cove Area, Bland, Pulaski, and Wythe counties, Virginia
… overridden from the southeast by rocks of the Saltville block. The northeast-trending Saltville thrust probably dips less than 25° in the area near Bland, Virginia, where Middle Ordovician rocks are exposed in a fenster. The rocks exposed in the fenster are probably part of the northwest limb …
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Structural geology of the Pulaski-Salem thrust sheet and the eastern end of the Christiansburg window, southwestern Virginia
… north to south they are Catawba, Salem, Pulaski, Saltville and Max Meadows. The structurally lowest block is the parautochthonous Saltville block which is exposed in the Christiansburg window of the Pulaski overthrust sheet. Exposed are the upper Elbrook Formation, the Cambro-Ordovician Knox Group …
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Cross-structural development at the southwestern termination of Walker Mountain, Virginia
The Saltville thrust sheet in the southwest Virginia portion of the Appalachian foreland fold and thrust belt generally has very little penetrative deformation. At the southern termination of Walker Mountain however, a continuous 10-15 km zone along strike is highly strained and polydeformed. In …
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A carbon and nitrogen isotopic analysis of Pleistocene food webs in North America: implications for paleoecology and extinction
… fossil localities: McKittrick Brea, California; Saltville, Virginia; and several sites in Florida. Collagen, a durable bone protein whose carbon and nitrogen isotopic composition reflects dietary input, was extracted from specimens and analyzed for delta-13C, delta-15N, % collagen, %C, %N, and …
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Kinematic implications of football structures
… of relations in the footwalls of the Saltville and St. Clair thrust-sheets near the Southern-Central Appalachian juncture indicates presence of at least two distinct types of footwall structures: 1)isolated forelimbs of thrust-truncated asymmetric ramp-generated anticlines, and …
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Geology of the Spruce Run Mountain area, Giles County, Virginia
… age from those of Middle Ordovician age. The Saltville thrust, a southeast dipping thrust fault, crosses the Spruce Run Mountain area trending northeast. The thrust separates Middle Cambrian dolomite from Ordovician formations on the southeast flank of the Spruce Run Mountain syncline. The …
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Broken-formations of the Pulaski thrust sheet near Pulaski, Virginia
… on the sheet and from rocks of the underlying Saltville sheet by (1) a sharp increase in the variability of fold and fault styles, (2) greater ranges in fold plunges and dips of axial surfaces, (3) a low degree of preferred orientation of folds and faults, (4) an increase in the frequency of …
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Life history of the endangered shiny pigtoe pearly mussel, Fusconaia edgariana, in the North Fork Holston River, Virginia
… North Fork Holston River (NEHRM 86.9) above Saltville, Virginia. Sixty 0.5m² Quadrats indicated a mean density of 10.6 mussels/m², representing 1 species. Six additional species were collect handpicking or in muskrat middens. The density edgariana was 1 adult/2 m². Distribution of the pigtoe …
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Assessment of Mussel Declines in the Clinch and North Fork Holston Rivers Using Histological Evaluations of Vital Organs
… in the NFHR. Historical industrial activities at Saltville, Virginia, as well as continued pollution of the NFHR from chemical waste ponds at this location, are believed to be significant contributors to mussel declines. Contaminant seepages from the waste ponds that include Cl⁻, K⁺, and NH₃-N …
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