A study of major structural features, tectonic fabrics, and fold analyses of polydeformed metamorphic rocks comprising three major thrust sheets that together form a large part of the southern Appalachian Mountains in northeast Georgia.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
To celebrate its fiftieth anniversary, the Carolina Geological Society invited forty-three authors to contribute to the creation of The Geology of the Carolinas. The only comprehensive, modern treatment of the subject, the volume has been prepared for a diverse readership ranging from undergraduate students to specialists in the fields of geology and related earth sciences. Following the editors' general introduction are chapters on Precambrian and Paleozoic metamorphic and igneous rocks of the Appalachian Blue Ridge and Piedmont; rocks of early Mesozoic rift basins, formed just before the opening of the Atlantic Ocean; Cretaceous and Tertiary sedimentary deposits of the Atlantic Coastal Plain; Quaternary geology and geomorphology; Cenozoic tectonism, including evidence for the recurrence of large earthquakes near Charleston; and an overview of mineral resources in the Carolinas. The book includes an index of field guides produced by the society and a thorough bibliography. By introducing exciting new concepts and focusing on challenging problems on the frontiers of research, this authoritative book will stimulate research in the years to come. The Editors: J. Wright Horton, Jr., is a research geologist for the United States Geological Survey in Reston, Virginia. Victor A. Zullo is a professor of geology at the University of North Carolina at Wilmington.
The 8th International Conference on Basement Tectonics was held in Butte, Montana, August 8-12,1988. Historically, basement tectonics conferences have focused on such topics as reactivation of faults, the influence of basement faults on metallogeny and hyrocarbon accumulation, and the use of geophysical and remote sensing techniques to interpret subsurface and surface geology. The 8th Conference diverged from past conferences in that a unifying theme was selected. Because ancient major terrane or cratonic boundaries are often postulated to be fault zones which are subsequently reactivated, the conference was organized to examine all aspects of ancient continental margins and terrane boundaries and to compare younger (Mesozoic) ones, about which more is known, with older (Paleozoic and Precambrian) ones. Moreover, because the 8th Conference was held in the northwestern United States, a greater emphasis was placed on the Mesozoic margin of western North America and the North American shield. The seven oral sessions and four poster sessions all dealt with aspects of the conference theme: characterization and comparison of ancient continental margins. The organizers extend their thanks to those individuals who graciously consented to serve as moderators for the oral sessions: John M. Bartley, Mark S. Gettings, M. Charles Gilbert, John M. Guilbert, Donald W. Hyndman, William P. Leeman, Robert Mason, and A. Krishna Sinha. The program with abstracts volume was prepared by S. E. Lewis and M. J. Bartholomew.
The Southern Nantahala Wilderness and the Buzzard Knob and Southern Nantahala Roadless Areas are near one another and near the North Carolina-Georgia State line in Rabun and Towns Counties, Ga., and Clay and Macon Counties, N.C. The areas collectively span a region of polydeformed and metamorphosed rocks assigned to three major thrust sheets, from east to west the Tallulah Falls, Helen, and Richard Russell thrust sheets. Outcrop patterns and minor structures in the older sillimanite- grade Richard Russell rocks in the western part of the study area outline an earlier phase of isoclinal folding not apparent in the outcrop pattern of younger kyanite- and staurolite-grade Coweeta Group rocks immediately to the east across the Shope Fork fault in the east-central parts of the study area. Major movement on the Shope Fork fault postdates isoclinal F1 folding but preceded F2 isoclinal folding, because F1 fold traces are covered by rocks above the fault and the fault is folded by F2 folds. Later shearing along the fault occurred during F3 cross-folding. Geologic considerations and geochemical sampling and analysis suggest low potential for all mineral resources except common building stone. The potential for some other nonmetallic resources, including corundum, feldspar, sheet mica, and vermiculite, is moderate to low. These are present in limited amounts but are currently of little economic value. The small deposits of soapstone present in the areas are too impure to be considered a resource. Late Archaic-Early Woodland Indian bowl-carving sites in soapstone are an archeological heritage that might deserve conservation. Oil and gas resource potential is unknown but believed to be small. Resource potential for gold is low; for massive sulfide deposits containing some copper and zinc, it is low to moderate. There is little to no resource potential for other metals.