The major faults of Western North Carolina discovered thus far are ancient, and none are known to be active. MF-Marion. The multiply-reactivated Brevard fault zone For terms and use, please refer to our Terms and Conditions Most were formed during the Paleozoic mountain building episodes, around 480 to 300 million years ago. Start at call number: G3701 .C5 SVAR .U5 I-511. These ridges are responsible for the Chattahoochee River's northeast-to-southwest course through north Georgia; they intercept drainage that would otherwise flow southeast toward the Atlantic Ocean, diverting it southwest toward the Gulf of Mexico. Year Published: 1978 Preliminary map of young faults in the United States as a guide to possible fault activity. The Journal of Geology Current issues are now on the Chicago Journals website. These features are best explained by a displacement history involving: (1) Taconic/Acadian nappe emplacement (part of the Brevard fault zone) which extended across the southern Appalachian core zone and is not unique to the Brevard zone; (2) earlier Alleghanian low-angle, dextral strike-slip shearing (Brevard mylonites) of the nappe assemblage, with the orientation of the zone strongly controlled by inherited Taconic/Acadian nappe structures; (3) later Alleghanian detachment within the metamorphic rocks, with substantial reactivation of the Brevard mylonite zone, and northwestward emplacement of the upper plate over platform sedimentary rocks (crystalline thrust sheet); (4) later reactivation of the shear zone in the crystalline allochthon as a thrust splay (Rosman fault). BFZ-Brevard Fault Zone. Most were formed during the Paleozoic mountain building episodes, around 480 to 300 million years ago. Others: BCP-Brooks Crossroads pluton. Some areas experienced up to three episodes of deformation and metamorphism that produced complex structures with multiple generations of folding and faulting. Brevard fault zone near Atlanta, Georgia Map Data Scale 1:48,000 (W 84⁰52ʹ30ʺ--W 84⁰30ʹ00ʺ/N 34⁰00ʹ00ʺ--N 33⁰30ʹ00ʺ) Note "Base from U.S. Geological Survey 1:24,000 and 1:62,500, 1954-56." There is an interactive map application to view the faults online and a separate database search function. Barbs on Taconic-Acadian thrusts. Library Finder Map. FIG. The Brevard zone runs right through the metropolitan Atlanta area and contains highly sheared rocks, indicating that a lot of movement occurred along the zone. During this time, the Earth’s crust in the region was buckled (folded) and shifted many miles to the northwest along thrust faults. Read your article online and download the PDF from your email or your account. On a shaded-relief map, many segments of the Brevard Zone show rhythmically-spaced parallel ridges, oriented along the Zone's northeast strike. The major faults of Western North Carolina discovered thus far are ancient, and none are known to be active. "Geology mapped in 1964-65." The map shows the service areas served by Brevard County Utility … In the northwestern part of the geologic map is the southeastern fl ank of the Tallulah Falls dome, which is rimmed by several 1.15 Ga Grenville basement bodies (Hatcher et al., 2004). Flood Zones Map. With a personal account, you can read up to 100 articles each month for free. Utility Services. The map shows benchmark information. Cross-section A-B is in figure 4. Rocks of Brevard Fault Zone: Geologic age: Uncertain, possibly Permian or Devonian: Lithologic constituents: Major ... (1:250,000), coverage data file geol250. The data represents the digital equivalent of the official State Geology map (1:500,000 scale), but was digitized from (1:250,000 scale) base maps. Abbreviations and symbols for all three maps: Faults: BCF-Brindle Creek. Along a 100 km segment in South Carolina and adjacent states, the Brevard zone contains three separate structural features, all of which dip moderately SE: (1) the narrow Rosman fault, which contain tectonic breccia and slices of the buried platform sedimentary rocks; (2) the Brevard mylonite zone, which contains mylonitic rocks that extend about 3 km on either side of the Rosman fault and exhibits shear sense criteria which consistently indicate dextral strike-slip; (3) the Brevard fault zone, SE of the Rosman fault, which contains stratified metamorphic rocks that are repeated by faults which at least in part predate mylonitization. An online map of United States Quaternary faults (faults that have been active in the last 1.6 million years) is available via the Quaternary Fault and Fold Database. Barbs on Alleghanian Blue Ridge-Inner Piedmont thrust. Public Works. These provinces are separated by the Brevard fault zone, but several other major structures are also present. SLMF-Sugarloaf Mountain. Today, the Journals Division publishes more than 70 journals and hardcover serials, in a wide range of academic disciplines, including the social sciences, the humanities, education, the biological and medical sciences, and the physical sciences. Interactive fault map; Database Search; Contributors; Download Data: KML (Google Earth) Files (13 MB KMZ) - includes 5 fault layers: Historic, Holocene to Latest Pleistocene, Late Quaternary, Mid-Late Quaternary, Quaternary; GIS files (16 MB ZIP file) This database contains information on faults and associated folds in the United States that demonstrate geological evidence of coseismic surface … AA = Alto al-lochthon. Select the purchase Includes index map, explanation, 2 cross-sections, map showing metamorphic zones, and stratigraphic diagram. Users can get the detailed benchmark information by clicking them. thrust/high-angle reverse faults. Since its origins in 1890 as one of the three main divisions of the University of Chicago, The University of Chicago Press has embraced as its mission the obligation to disseminate scholarship of the highest standard and to publish serious works that promote education, foster public understanding, and enrich cultural life. The Brevard Fault Zone in this location consists of cataclasites and mylonitic retrograded metamorphic rocks such as graphite schist, button schist (formed from mica, chlorite, felspar and quartz), phyllonites (formed from a coarse grained schist). institution. 1.-(a) Index map showing major geologic provinces and known extent of the Brevard zone in the southern Appalachians. Modified after Hatcher (2002), Merschat (2002), and Gilliam(2010). (b) Geologic map showing Brevard fault zone in South Carolina and vicinity. This item is part of JSTOR collection Read the latest issue.One of the oldest journals in geology, The Journal of Geology (JG) has since 1893 promoted the systematic philosophical and fundamental study of geology. Login via your Library Finder. CPS-Central Piedmont Suture. It is particularly well exposed west of Atlanta along Interstate 285 near the Chattahoochee River (La Tour … Joint faces (In Other words Walls) are parallel . During this time, the Earth’s crust in the region was buckled (folded) and shifted many miles to the northwest along thrust faults. All Rights Reserved. The displacement history of the Brevard zone, a linear, orogen-scale structure in the metamorphic core of the southern Appalachians, has been controversial. Mylonitic rocks are, for the most part, continuous along most faults in and northwest of the Brevard fault zone. In northwest … "Geology mapped in 1964-65." The… Another major fault in the region is the Linville Falls fault. Geological and seismic data indicate that the Brevard zone and the Taconic/Acadian metamorphic rocks in which it resides are contained in a huge crystalline thrust sheet that overlies relatively unmetamorphosed platform sedimentary rocks along a major Alleghanian thrust fault. Request Permissions. View full … Data, maps or digital files are prepared by employees of Brevard County and may not be resold without prior consent from the Brevard County Board of County Commissioners. Public Works Benchmark Map. The Brevard Fault Zone runs threw the southwest and northeast threw Georgia, Alabama, and North Carolina. This map gives an overview of geologically young faults and is intended to help in evaluation of the potential activity of faulting nationally. Includes index map, explanation, 2 cross-sections, map showing metamorphic zones, and stratigraphic diagram. The Brevard Fault Zone follows the high ridge of the blue ridge mountains. Some parts of the fault line have v ertical joints alongside the trail that run through the fault line. option. JSTOR is part of ITHAKA, a not-for-profit organization helping the academic community use digital technologies to preserve the scholarly record and to advance research and teaching in sustainable ways. KML (Google Earth-type) files and GIS shape files are also available for download from the site. © 1987 The University of Chicago Press The most significant fault in the region is the Brevard fault zone, which extends from Alabama to Virginia across North Carolina, where it coincides with a long, linear topographic low. JG publishes original research across a broad range of subfields in geology, including geophysics, geochemistry, sedimentology, geomorphology, petrology, plate tectonics, volcanology, structural geology, mineralogy, and planetary sciences. Published By: The University of Chicago Press, Read Online (Free) relies on page scans, which are not currently available to screen readers. Many of its articles have wide appeal for geologists, present research of topical relevance, and offer new geological insights through the application of innovative approaches and methods. The maps, graphics and data presented on this website are being displayed for informational purposes only. institution, Login via your The application helps users to find the library near a location and provide a driving direction for it. MSF-Mill Spring. ©2000-2020 ITHAKA. Steven H. Edelman, Angang Liu and Robert D. Hatcher Jr. Southeast of the fault zone mylonite only has been observed in a few widely scattered local Brevard fault zone near Atlanta, Georgia Map Data Scale 1:48,000 (W 84⁰52ʹ30ʺ--W 84⁰30ʹ00ʺ/N 34⁰00ʹ00ʺ--N 33⁰30ʹ00ʺ) Note "Base from U.S. Geological Survey 1:24,000 and 1:62,500, 1954-56." Check out using a credit card or bank account with. To access this article, please, Access everything in the JPASS collection, Download up to 10 article PDFs to save and keep, Download up to 120 article PDFs to save and keep. Access supplemental materials and multimedia. Browse related items. 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