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The geology of an area of 660 square miles mostly in the northeastern corner of Tennessee and small adjacent areas in Virginia and North Carolina is the subject of this report. The region lies principally in the Unaka province, with extensions northwestward into the Appalachian Valley and southwestward into the Blue Ridge province. The report combines results of surveys made between 1941 and 1953 by the U. S. Geological Survey, the Tennessee Division of Geology, and the Tennessee Valley Authority, and is published in cooperation with the Tennessee Division of Geology. Northeasternmost Tennessee is a region of widespread mineralization and was formerly important for mineral production. Iron, manganese, and bauxite...
Tags: Abingdon,
Alluvium,
Andesite,
Argillite,
Arkose, All tags...
Austinville,
Baldwin Gap,
Blue Ridge,
Bluff City,
Bristol,
Cambrian,
Carbonate rock,
Carter,
Cenozoic,
Chert,
Conglomerate,
Conococheague Limestone,
Damascus,
Doe,
Dolostone,
Economic Geology,
Elbrook Dolomite,
Elizabethton,
Elk Mills,
Elk Park,
Erwin,
Erwin Formation,
Flaser gneiss,
Gneiss,
Granite,
Granodiorite,
Gravel,
Grayson,
Graywacke,
Greenstone,
Hampton,
Hampton Formation,
Holston Valley,
Honaker Dolomite,
Iron Mountain Gap,
Iron Mountains,
Jonesboro Limestone,
Keenburg,
Konnarock,
Latite,
Laurel Bloomery,
Lenoir Limestone,
Limestone,
Lucy Creek,
Lynn Mountain,
Migmatite,
Mill Creek,
Mount Rogers volcanic group,
Mountain City,
Mylonite,
Nolichucky Shale,
North Carolina,
Ordovician,
Paleozoic,
Phyllite,
Phyllonite,
Precambrian,
Quartz monzonite,
Quartzite,
Quaternary,
Rhyolite,
Rome Formation,
Sandstone,
Schist,
Shady Dolomite,
Shady Valley,
Shale,
Sherwood,
Siltstone,
Slate,
South Holston Lake,
Stone Mountain,
Stratigraphy,
Structural Geology,
Talus,
Tennessee,
Tertiary,
Tuff,
USGS Science Data Catalog (SDC),
Unicoi Formation,
Valley Forge,
Virginia,
Watauga,
White Rocks Mountain,
Zionville,
iron,
manganese,
metamorphic rocks,
metamorphism (geological),
plutonic rocks,
sedimentary rocks,
unconsolidated deposits,
volcanic rocks,
zinc, Fewer tags
This publication is a preliminary map and geodatabase of the coseismic surface rupture and other coseismic features generated from the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina. Geologic mapping facilitated by analysis of post-earthquake quality level 0 to 1 lidar, document the coseismic surface rupture, named the Little River fault, and other coseismic features. The Little River fault is traced for approximately 4 kilometers and cuts the regional Paleozoic fabric (mean foliation, 063°/57°), and the dominant strike of joint sets are 0°–10°, 130°–150° and 320°–340°. Individual fault strands occur in an en echelon pattern within an approximately 10-meter-wide zone. Trenches across the Little River...
Tags: Alleghany County,
Alligator Back Metamorphic Suite,
Alluvium,
Amphibolite,
Ashe Metamorphic Suite, All tags...
GPS measurement,
Gneiss,
Metasedimentary rock,
North America,
North Carolina,
Schist,
Seismology,
Sparta,
Structural Geology,
USGS Science Data Catalog (SDC),
United States,
digitization,
earthquakes,
field methods,
field sampling,
foliation (geologic),
geologic maps,
geologic processes,
geologic structure,
geology,
geophysics,
geoscientificInformation,
igneous rocks,
information technology methods,
lidar,
lineation (geologic),
metamorphic rocks,
mineral resources,
plutonic rocks,
remote sensing,
seismology,
specimen collecting,
structural geology,
structure,
tectonic processes,
trenching,
uplift, Fewer tags
Regional geologic investigations show that all the metamorphosed crystalline rocks underlying the Greenville 1 degree x 2 degree quadrangle are allochthonous. Seismic-reflection studies, the COCORP line (Cook and others, 1979), and the U.S. Geological Survey (USGS) seismic lines (Harris and Bayer, 1979; Harris and others, 1981) present seismic profiles across different parts of the southern Appalachians. Recent geophysical studies for the now discontinued Appalachian Ultradeep Core Hole (ADCOH) project were concentrated in the Greenville quadrangle (Hatcher and others, 1988). The ADCOH seismic-reflection profiles tie in with the COCORP profile of Cook and others (1979), providing a three-dimensional view of the...
Tags: Amphibolite,
Antreville,
Blue Ridge,
Caesars Head Granite,
Calc-silicate rock, All tags...
Cambrian,
Chauga River Formation,
Copperhill Formation,
Coronaca Granite,
Devonian,
Diabase,
Elberton Granite,
Gabbro,
Georgia,
Gneiss,
Granite,
Granodiorite,
Great Smoky Group,
Greenville,
Helen Group,
Henderson Gneiss,
Horton Formation,
Hothouse Formation,
Hughes Gap Formation,
Jurassic,
Mesoproterozoic,
Mesozoic,
Metasedimentary rock,
Metavolcanic rock,
Mineral Resources,
Mississippian,
Monzonite,
Mylonite,
Nacoochee Formation,
Nantahala Shale,
Neoproterozoic,
Ocoee Supergroup,
Ordovician,
Paleozoic,
Paragneiss,
Pegmatite,
Pennsylvanian,
Permian,
Phyllite,
Phyllonite,
Poor Mountain Formation,
Quartzite,
Richard Russell Formation,
Robertstown Formation,
Schist,
Silurian,
South Carolina,
Structural Geology,
Syenite,
Tonalite,
Toxaway Gneiss,
Trondhjemite,
USGS Science Data Catalog (SDC),
Wehutty Formation,
digitization,
earth sciences,
folding (geologic),
foliation (geologic),
geologic history,
geoscientificInformation,
geospatial datasets,
igneous rocks,
lineation (geologic),
metamorphic rocks,
metamorphism (geological),
plutonic rocks,
radiometric dating,
rubidium-strontium analysis,
structural geology,
uranium-lead analysis,
volcanic rocks, Fewer tags
The Blue Ridge belt in northwestern North Carolina and northeastern Tennessee is composed chiefly of 1,000-million to 1,100-million-year-old metamorphic and plutonic rocks that have been thrust many miles northwestward across unmetamorphosed Cambrian(?) and Cambrian sedimentary rocks of the Unaka belt. The Blue Ridge thrust sheet is rooted on the southeast along the Brevard zone, a zone of strike-slip faulting along which metamorphic and plutonic rocks of the Inner Piedmont belt are juxtaposed with rocks of the Blue Ridge. Near the southeastern edge of the Blue Ridge belt, the Blue Ridge thrust sheet is breached by erosion, and the rocks beneath are exposed in the Grandfather Mountain window, which is 45 miles long...
Tags: Alluvial fan,
Alluvium,
Amphibolite,
Arkose,
Ashe, All tags...
Avery,
Basalt,
Beech Granite,
Blowing Rock Gneiss,
Brown Mountain Granite,
Burke,
Caldwell,
Cambrian,
Carter,
Chilhowee Group,
Cranberry Gneiss,
Diabase,
Dolomite,
Dolostone,
Erwin Formation,
Gabbro,
Gneiss,
Grandfather Mountain Formation,
Granite,
Granodiorite,
Gravel,
Greenschist,
Hampton Formation,
Johnson,
Limestone,
Linville Metadiabase,
McDowell,
Migmatite,
Mineral Resources,
Mitchell,
Mudstone,
Mylonite,
North America,
North Carolina,
Paleozoic,
Phyllonite,
Proterozoic,
Quartz monzonite,
Quartzite,
Quaternary,
Rome Formation,
Sandstone,
Schist,
Shady Dolomite,
Shale,
Siltstone,
Structural Geology,
Tennessee,
Triassic,
Tuff,
USGS Science Data Catalog (SDC),
Ultramafic intrusive rock,
Unicoi Formation,
United States,
Volcanic ash,
Watauga,
Wilkes,
Wilson Creek Gneiss,
bedrock geologic units,
building stone resources,
copper,
core analysis,
critical minerals,
earth sciences,
earth structure,
field sampling,
folding (geologic),
foliation (geologic),
fracture (geologic),
geologic contacts,
geologic history,
geologic maps,
geologic structure,
geology,
geoscientificInformation,
geospatial datasets,
igneous rocks,
iron,
lead,
lineation (geologic),
lithostratigraphy,
manganese,
metallic mineral resources,
metamorphic rocks,
metamorphism (geological),
microscopy,
mineral resources,
mineralogy,
nonmetallic mineral resources,
petrography,
petrology,
plutonic rocks,
sedimentary rocks,
stratigraphy,
structural geology,
titanium,
unconsolidated deposits,
uranium,
volcanic rocks,
zinc, Fewer tags
The geodatabase for the Charlotte 1 degree × 2 degrees quadrangle by Goldsmith and others (1988) was compiled in the Geologic Map Schema (GeMS). The geologic map extends across four lithotectonic belts of the Piedmont from the Coastal Plain and Wadesboro Triassic basin on the east to the Blue Ridge belt in the vicinity of the Grandfather Mountain window on the west. The Wadesboro Triassic basin contains arkosic sandstone, siltstone and conglomerate unconformably overlain by small inliers of late Cretaceous Coastal Plain sediment of the Middendorf Formation (?). The Blue Ridge, Inner Piedmont, Kings Mountain, Charlotte, and Carolina Slate belts consist of different Mesoproterozoic to Late Paleozoic metamorphosed...
Tags: Albemarle Group,
Alexander County,
Alligator Back Formation,
Ashe Formation,
Battlefield Formation, All tags...
Blacksburg Formation,
Blowing Rock Gneiss,
Blue Ridge,
Brevard fault zone,
Brown Mountain Granite,
Burke County,
Caldwell County,
Cambrian,
Catawba County,
Catawba River,
Charlotte,
Cherry Mountain,
Cherryville Granite,
Chilhowee Group,
Churchland Plutonic Suite,
Cid Formation,
Concord Plutonic Suite,
Cowpens,
Cranberry Gneiss,
Crossnore Complex,
Davie County,
Denton,
Devonian,
Durham,
Early Cambrian,
Early Devonian,
Ediacaran fauna,
Elk Park Plutonic Suite,
Flat Swamp Member,
Floyd Church Formation,
Gaffney,
Gastonia,
Henderson Gneiss,
Henry Fork,
High Shoals Granite,
Jumping Branch Manganiferous Member,
Jurassic,
Kings Mountain,
Lake Norman,
Late Cretaceous,
Late Ordovician,
Late Proterozoic,
Late Triassic,
Lincoln County,
Lincolnton,
Middle Proterozoic,
Mississippian,
North Carolina,
Paleozoic,
Pennsylvanian,
Permian,
Piedmont,
Precambrian,
Roxboro,
Salisbury Plutonic Suite,
Sandy Mush,
Sauratown Mountains,
Shady Dolomite,
Silurian,
South Carolina,
South Mountains,
Sunshine,
Tillery Formation,
Triassic,
USGS Science Data Catalog (SDC),
Uwharrie Formation,
Wadesboro,
Wilson Creek Gneiss,
Winston-Salem,
Yadkin Formation,
Yadkin River,
alaskite,
allochthonous,
amphibolite,
amphibolite facies,
anticline,
arkosic sandstone,
breccia,
brecciation,
brittle deformation,
cataclasis,
conglomerate,
coticule,
diabase,
diorite,
dolomite,
ductile faulting,
epidote-amphibolite facies,
fossils,
gabbro,
gneiss,
gondite,
granite,
granodiorite,
graywacke,
greenschist facies,
hornfels,
igneous rocks,
lamprophyre,
manganiferous chert,
metadiabase,
metadiorite,
metagabbro,
metagranite,
metagranodiorite,
metagraywacke,
metamorphic rocks,
metamorphism (geological),
metasyenite,
metatonalite,
metatrondhjemite,
metavolcanic rocks,
metavolcanic rocks,
monzogranite,
mudstone,
mylonite,
mylonitized,
nappe,
none,
pegmatite,
phyllite,
plutonic rocks,
quartzite,
recumbent folding,
schist,
sedimentary rocks,
shear zone,
siltstone,
staurolite-kyanite zone,
syenite,
syncline,
tonalite,
tourmaline-quartz rock,
tuff,
ultramafic rocks,
volcanoes, Fewer tags
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