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Petrology of the Gizzard Group near Dunlap, the Tennessee southeastern Cumberland Plateau

Conference · · Geological Society of America, Abstracts with Programs; (United States)
OSTI ID:6077263
 [1]
  1. Univ. of Tennessee, Chattanooga, TN (United States). Dept. of Physics, Geology, and Astronomy
The lowermost Pennsylvanian Gizzard Group of Tennessee can be subdivided into sandbody and heterolithic sequences, both exhibiting fining-upward cyclic sedimentation. The sandbody sequence consists of sublitharenite, quartzarenite and quartz-pebble conglomerate, while the heterolithic sequence consists of sandstone (litharenite, sublitharenite, quartzarenite), siltstone, and shale with occasional coal seams and siderite nodules. Sandstone of the Gizzard Group near Dunlap is of the litharenite to sublitharenite variety and contains rock fragments which include polycrystalline quartz, chert, micaceous schist, and gneiss. The mineralogical composition is dominated by quartz, with subordinate amounts of calcite, epidote, chlorite, and very minor amounts of feldspars. Thus, the clastics were derived from a metamorphosed region, and most likely from an orogenic front, but not from a craton unlike recent suggestions for similar rocks of adjacent basins.
OSTI ID:
6077263
Report Number(s):
CONF-9304188--
Conference Information:
Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 25:4
Country of Publication:
United States
Language:
English

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