16,581 research outputs found

    New records of Tephritidae (Diptera) from Great Smoky Mountains National Park - 2

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    Thirty additional species of tephritid flies (Diptera: Tephritidae) from Great Smoky Mountains National Park (GSMNP), including historical records, are presented together with information on host(s), if known, distributions, and life histories. This brings the total number of tephritid flies recorded from GSMNP to 46

    The Smoky Hill Trail In Western Kansas, 1859-1869

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    The purpose of this study is to point out the importance of the Smoky Hill Trail. The major emphasis is placed upon the section of the trail between the present day Ellsworth, Kansas, and the western boundary of Kansas, since this section has received but small notice in previous studies

    A History of the Smoky Mountain Railroad

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    This thesis is concerned with the history of a local enterprise, the Smoky Mountain Railroad. The writer has had to rely on limited sources of information. Extensive use has been made of the newspapers with additional information coming from government documents, court records, interviews, and some records of the later years of the railroad. The writer has spent many long, hard hours reading and taking notes on this material. Much of the information available was of little use in writing a thesis and the writer has had to assume many things. The writer found that the railroad began in 1907 as an undertaking of prominent local Knoxvillians. It was owned and operated by several men and firms over the years and had several different corporate names. Most of its owners were interested only in personal gain and therefore the railroad was neglected until it finally reached the point of no return and was abandoned in the mid-1960\u27s

    ACL News & Notes

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    Temporal trends in annual water yields from the Mackenzie, Saskatchewan-Nelson, Churchill, and Missouri-Mississippi River watersheds in western and northern Canada

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    Historical temporal trends in annual water yields were examined at 109 hydrometric monitoring stations in the Mackenzie, Saskatchewan-Nelson, Churchill, and Missouri-Mississippi River watersheds from the western Canadian provinces of Alberta, Saskatchewan, and northeastern British Columbia, as well as the Northwest Territories and the eastern portion of the Yukon territory. Effective drainage areas range in size from 325 to 1,680,000 (mean=65,600; median=9,300) km^2^, with associated hydrometric record lengths ranging between 18 and 97 (mean=41; median=38) years. Approximately three-quarters of the stations have no significant trend in average annual flow, with about equal numbers of stations exhibiting significant temporal increases or decreases in annual water yields. Southwestern Alberta and the southwestern Northwest Territories contain small clusters of stations with increasing water yield trends; clusters of decreasing water yield trends are primarily located in central and southern Alberta. The co-location of regions with clusters of both increasing and decreasing trends, or increasing/decreasing and no trends, complicates generalizing broader scale trends in annual water yields across these regions of Canada. No bias in the trend directions appears evident with either watershed size or the length of the hydrometric record

    Structure of Blue Ridge thrust front, Tennessee, Southern Appalachians

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    An interpretation of a COCORP seismic reflection profile indicates that the Great Smoky thrust, cropping out in Southeast Tennessee, has a slip of about 140 km. Eight structure sections, drawn to the base of Paleozoic deformation, straddle the trace of the thrust and cover an area of about 12,000 square km. The sections show that the Great Smoky thrust cuts the most internal (southeasterly) structures of the Valley and Ridge thrust system, but was in place prior to movement of the Saltville fault in that system.The section suggests that several thrusts internal to the Great Smoky fault (Miller Cove, Dunn Creek, Brushy Mountain, and others) belong to a sled runner thrust complex (COCORP thrust system) similar to the Valley and Ridge. The basal detachment in this complex was the Great Smoky fault, and, in Northeast Tennessee, the Pulaski fault. The CGCORP thrust system differs from the more external Valley and Ridge thrust system in that it dismembers structures formed by polyphase, at least partly early Paleozoic, deformation. Pre-, syn-, and post- foliation structures are cut obliquely (map view) and discordantly (cross section) by elements of the COCORP thrust system along its external limit of outcrop. In the internal portion of the western Blue Ridge, relations of folds to COCORP thrusting are poorly documented, but several tectonic events are broadly synchronous with regional metamorphism. In particular, the Greenbrier fault, considered premetamorphic because it does not affect metamorphic isograds, postdates two phases of major folding. The dominant foliation in the area is axial planar to the earlier of these folding phases. In the Murphy area, however, the dominant and apparently earliest foliation is axial planar to a major structure which clearly folds isograds. A stratigraphic model for upper Precambrian to lowest Cambrian sediments in the Blue Ridge suggests that the Chilhowee, Walden Creek, Snowbird, and Great Smoky groups are partly facies equivalent strata. This model is based on a lower Ordovician or younger age of the Murphy marble and the assumption that the floor of the basin descends monotonically southeastward. Strike of facies boundaries, in palinspastic restoration, is east-west, or as much as 30 degrees more easterly than the strike of faults of the COCORP thrust system. In its restored position, the sedimentary wedge can be tied to a wedge of autochthonous sediments beneath east-central Georgia, evident in an interpretation of COCORP seismic reflection data. There is rough correspondence between the tapered edge of the sediments and a prominent gravity gradient. In thin-section, rocks of the Great Smoky Mountains and foothills, ranging from unmetamorphosed to the garnet zone of metamorphism, show less increase in grain size of layer silicates than expected. However, differences in character of both the main foliation in particular areas, and less obvious foliations, suggest increasing mobility of silica and other constituents and increasing dominance of lattice diffusion over grain-boundary diffusion in rocks deformed at higher temperature
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