# main_datatable

Unit_Desc:
Unconsolidated silt, sand, cobbles, and small boulders along streams, floodplains, and alluvial plains. Sediments well to poorly stratified, commonly in fining-upward sequences as much as 20 ft (6 m) thick. Includes alluvial terraces, colluvium, and debris from adjacent slopes as much as 40 ft (12 m) above stream channel. Bedrock outcrops too small to portray are exposed locally


Unit_Desc:
Boulder streams, boulder fields, and talus containing minor alluvium and debris. Boulder streams and boulder fields are chiefly Pleistocene in age, colluvium ranges from Pleistocene to Holocene. Deposits are clast-supported diamicton of angular to sub-rounded boulders and cobbles of quartz-rich rock. Sandstone and quartzite on Chilhowee Mountain, Tennessee, and metasandstone, metaconglomerate, quartzite, and gneiss in the Blue Ridge highlands form distinctly different colluvium that are not differentiated on the map. The sandstone and quartzite on Chilhowee Mountain forms equidimension, 0.5 m angular blocks of colluvium. Gneiss and quartzite form meter-long slabby blocks of colluvium. Metasandstone and metaconglomerate form a wider range of size of blocks of colluvium. The surface of the deposit is blocky and sparsely vegetated. Occur on higher slopes as talus near bedrock outcrop and escarpments, and as fill in steep hollows. Colluvium grades down slope and is transitional into debris. Thickness from 10 to 100 ft (3 to 30 m)


Unit_Desc:
Matrix-supported diamicton that form fans on lower slopes and valleys of the foothills of the western Blue Ridge in Tennessee. Consists of poorly-sorted sub-rounded boulders, cobbles, and pebbles of quartz-rich rock in a matrix of pebbles, sand, silt and clay that may be locally stratified. Fan-shaped deposits of metamorphosed sandstone and conglomerate of the Cades Sandstone and Walden Creek Group in the foothills of the western Blue Ridge, Tennessee, are vegetated with boulders on the surface


Origin:
Modern debris flows during high rainfall

Unit_Desc:
Debris flow scars, tracks, and deposits in the Blue Ridge highlands as the result of modern and historic storms with high rainfall. Scars at the head areas are underlain by mostly slate bedrock, but bedrock, minor rubble, and vegetation are in scars in hollows and chutes oriented down slope. Deposits consist of slabby boulders, cobbles, and finer rock fragments of fresh slate and metasandstone, minor soil, and vegetation including trees and shrubs. On lower slopes, scars in channels have deposits consisting of logs and rock rubble that form terraces as much as 30 ft (9 m) thick. Debris flow scars, tracks, and deposits of post-1900 to pre-1970, and post-1970 debris flows are usually free of vegetation (Schultz, 1999)


Origin:
Physical and chemical weathering of rock in place

Comments:
Locally resembles alluvial gravel and debris

Unit_Desc:
Pebbles, cobbles, and small boulders of sub-angular chert, quartz, and jasperoid in red clay and silty soil overlying carbonate bedrock units in the western foothills. Includes a mixture of gravel of quartzite and vein quartz, pellets of manganese and iron, sand, and deep-red silt in broad areas of the Tennessee Valley that may be old alluvium mixed with residuum (Neuman and Wilson, 1960)


Origin:
Chemical dissolution of limestone by water

Unit_Desc:
Solution depressions (sinkholes), and hummocky, karst topography consisting of clusters of sinkholes and bedrock pinnacles, and cave openings in areas underlain by carbonate bedrock. Sinkholes are common in the Tennessee Valley but are also found within the tectonic windows in the foothills of the western Blue Ridge of Tennessee. Sinkholes are developed in alluvial valleys, on mountain tops, and within debris fan deposits and fluvial terraces


Unit_Desc:
Unconsolidated  sand, gravel, cobbles, and boulders of quartz-rich rocks mostly deposited by rivers. Deposits largely have been eroded from terraces that are as much as 200 ft (60 m) above present flood plain alluvium. Elevated landform and deposit are from an old erosion surface. In Tuckaleechee Cove, upper level terrace may be transitional with metasandstone debris


Unit_Desc:
Basal conglomerate overlain by maroon pebbly arkose interbedded with maroon shale and siltstone, grades upward into light gray arkose, sandstone, and quartzite


Unit_Desc:
Quartzite, argillaceous, silty, micaceous shale, and coarse sandstone, undifferentiated


Fossil:
lingulellid brachiopods, trilobites olenellus, Isoxys chilhoweana, Indiana tennesseensis and Hyolithes

FossilRef:
Walcott, 1891; Resser, 1938; Neuman and Nelson, 1965

Unit_Desc:
Gray micaceous shale with beds of coarse sandstone


Unit_Desc:
Greenish-gray argillaceous to silty shale


Unit_Desc:
Thin-bedded white quartzite containing skolithus


Unit_Desc:
Maroon sandstone, siltstone, and shale, and subordinate quartzite, siltstone, shale, and limestone of the Rome Formation grade upward into greenish-gray and red siltstone, silty shale, and thin layers of limestone of the Pumpkin Valley Shale


Unit_Desc:
Variegated purple and green fissile shale with 20 ft thick limestone bed


Unit_Desc:
Limestone with argillaceous partings at the base and fine-grained dolomite at the top


Fossil:
brachiopods, bryozoans, coral, pelecypods, conularids, trilobites, fish scales, gastropods, ostracodes, crinoid columns and plates, platycrinid columns, and plant fragments

Unit_Desc:
Noncalcareous siltstone and fine-grained sandstone grades upward to coarser-grained feldspathic sandstone and pebble conglomerate interbedded with silty shale


LithPrim:
calcareous shale and argillaceous limestone

Unit_Desc:
Interbedded gray calcareous shale, argillaceous limestone, and fine-grained sandstone, and red shale and sandstone


Unit_Desc:
Red calcareous mudrock and siltstone, locally with coarse-


Fossil:
ostracodes, liguloid brachiopods, and pelecypods.

Unit_Desc:
Red calcareous mudrock and siltstone, locally with coarse-grained feldspathic and quartzitic sandstone interbedded with red fine-grained sandstone


Unit_Desc:
Dark fissile calcareous shale withlocal beds of sandstone in the lower part and a thin limestone locally at the base


Formation:
Newhala Limestone, Longview dolomite, Chepultepec Dolomite,Copper Ridge Dolomite, Maynardville Limestone

Unit_Desc:
Limestone with interbedded dolomite and sandstone, Longview dolomite with chert, Chepultepec dolomite is limestone and subordinate dolomite and sand in the upper part, Copper Ridge cherty dolomite; Upper Cambrian Maynardville limestone included locally at base


Unit_Desc:
Gray calcareous sandstone and argillaceous shale


Unit_Desc:
Thick bedded to massive gray to red coarsely crystalline marble occurs as lens in sandstone


Fossil:
brachiopods, mollusks (gastropod operculae and orthocone cephalopods), trace fossil tubes, and possibly fragments of trilobite

FossilRef:
(Neuman, 1947; Neuman and Nelson, 1965; Southworth and others, 1999

Unit_Desc:
Dolomite and sandy limestone  (locally includes Middle Ordovician Lenoir Limestone)


Unit_Desc:
Locally containing the fine-grained Mosheim limestone member and basal clastic rocks of the Douglas Lake member and Holston Formation and Cmn?


Unit_Desc:
Lower calcarenite and sandy limestone and upper gray calcareous shale


Unit_Desc:
Gray calcareous silty and sandy shale and locally sandstone


Unit_Desc:
Gray sandy or silty calcareous shale with beds of calcareous sandstone, fine-grained sandstone, and impure limestone


Unit_Desc:
Tabular, lenticular,  irregular bodies of pegmatite (plagioclase, perthite, quartz, muscovite, or biotite). Sizes range from 1 inch thick and 12 inch long to 210 feet thick and 490 feet long


Unit_Desc:
Metamorphosed coarse-grained hornblende metadiorite, fine-grained metadiabase, greenstone with epidosite, altered siliceous schist and ankerite-chlorite schist


Unit_Desc:
Foliated amphibole-plagioclase gneiss as pods, layers, and lens in Mesoproterozoic  gneisses


Unit_Desc:
Strongly foliated and lineated dark biotite granitoid gneiss with distinctive augen of white feldspar in Cherokee- Raven Fork belt. SHRIMP U/Pb zircon age 1029 +-3 (Southworth and Aleinikoff, in press). Contains abundant xenoliths of amphibolite


Unit_Desc:
Medium- to coarse-grained, foliated biotite granitic gneiss that intrudes migmatitic biotite gneiss in the Bryson City dome. Similar rock with some coarse porphyroblastic augen of potassium feldspar intrudes hornblende-biotite gneiss near Dellwood


Unit_Desc:
Medium-grained, mottled greenish-gray granodiorite with hypersthene and tan feldspar on Cove Mountain.  SHRIMP U/Pb zircon age 1040


Unit_Desc:
Dark carbonaceous noncalcareous shale; locally at the base is sandstone a few inches thick and sandy shale


Origin:
partially melted sedimentary and igneous rocks

Unit_Desc:
Gray, well-layered, hornblende-biotite-quartz-plagioclase gneiss. Contains amphibolite, leucosomes, and is migmatitic


Unit_Desc:
Migmatitic biotite gneiss containing leucosomes and amphibolite


Unit_Desc:
Strongly foliated and lineated biotite granitic gneiss with augen of pink feldspar; forms the "border gneiss"(Cameron, 1951) on the north and west margin of the Bryson City dome


Unit_Desc:
Coarse-grained granite with large porphyroblasts of feldspar and quartz intrudes hornblende-biotite gneiss in Ela dome.


Unit_Desc:
Heterogeneous biotite granitic gneiss interlayered with biotite granodioritic gneiss, tonalitic gneiss, quartz monzodioritic gneiss, amphibolite, biotite gneiss, and biotite schist (Carter and Wiener, 1999)


Unit_Desc:
Pods and bodies of metamorphosed mafic and ultramafic rocks within Mesoproterozoic gneisses. Includes metaperidotite and metagabbro in the Bryson City dome


Unit_Desc:
Dark graphitic and sulfidic slate, metasiltstone, and phyllite, with local beds of thin to thick metasandstone and metagraywacke


Unit_Desc:
Light slate with thin dark elliptical porphyroblasts of chloritoid


Unit_Desc:
Light, coarse-grained to conglomeratic metagraywacke interbedded with metasiltstone


Unit_Desc:
Metasandstone and muscovite schist with abundant metasiltstone in the lower part. Upper part is dark graphitic and sulfidic mica schist and metasiltstone interbedded with metagraywacke, metasiltstone, and muscovite schist, and locally metaquartzite and garnet-biotite porphyroblastic mica schist


Unit_Desc:
Thin dark bodies of fine-grained dolomite, sandy dolomite, and pisolitic dolomite, range from 1-3 ft thick; shown by x


Unit_Desc:
Light, fine-grained metasandstone, ankerite-rich metasandstone, chloritoid metasiltstone, and ankeritic sandy dolomite


Unit_Desc:
Muscovite-biotite gneiss, locally sulfidic; interlayered and gradational with mica schist, minor amphibolite, and hornblende gneiss; intruded by trondhjemite dikes


Unit_Desc:
Medium- to coarse- grained feldspathic metasandstone and metagraywacke in thin to medium thick layers, interbedded with dark metasiltstone and slate; Contains local conglomeratic interbeds of cobbles and boulders of leucocratic granite. Resembles the thicker bedded and coarser-grained Thunderhead Sandstone


Unit_Desc:
Massive and coarse metagraywacke and metaconglomerate interbedded with quartz-garnet-muscovite phyllite and schist, locally sulfidic


Unit_Desc:
Quartz-muscovite schist and phyllite interbedded with metagraywacke. Phyllite locally graphitic and sulfidic.Schist contains porphyroblasts of garnet, kyanite, or staurolite, corresponding to metamorphic grade


Unit_Desc:
Dark slaty metasiltstone, locally graphitic and sulfidic, interbedded with metagraywacke


Unit_Desc:
Dark metasiltstone interbedded with fine-grained metasandstone


Unit_Desc:
Sericite-schist containing abundant biotite and lesser staurolite and garnet porphyroblasts, interbedded with metagraywacke and quartz pebble conglomerate in middle and upper part


Unit_Desc:
Dark feldspathic and argillaceous metasandstone interbedded with dark metasiltstone. Metasandstone distinctively finer-grained and thinner bedded than overlying Thunderhead Sandstone


Unit_Desc:
Metasandstone with subordinate muscovite schist grades upward to dark porphyroblastic muscovite schist and metasandstone


Origin:
shallow water shelf with rivers and canyons


Unit_Desc:
Lustrous, greenish-gray chlorite-sericite phyllite and laminated metasiltstone strongly sheared with multiple cleavages


Unit_Desc:
Feldspathic quartzite with numerous thin layers of dark laminated, sometimes sulfidic, dark-gray slate


Unit_Desc:
Massive green and blue-green chlorite-rich laminated metasiltstone with minor fine-grained feldspathic metasandstone. Laminations show current bedding, soft-sedimentary folds and faults. Primary foliation in rock is cleavage. Upper part near Dunn Creek fault contains abundant laminae of iron-bearing carbonate


Unit_Desc:
Thick beds of fine-grained feldspathic metasandstone


Unit_Desc:
Thick beds of gray fine-grained feldspathic metasandstone interbedded with dark slate, partly current bedded; minor amounts of arkosic conglomerate and intraformational breccia


Unit_Desc:
Thin to thick beds of fine-grained greenish-gray feldspathic metasandstone interbedded with dark chloritic metasiltstone and phyllite


Unit_Desc:
Prominent beds of fine-grained feldspathic metasandstone


Unit_Desc:
Dark slate and metasiltstone interbedded with fine-grained metasandstone


Unit_Desc:
Dark gray to greenish-gray laminated siltstone and slate


Unit_Desc:
Greenish-gray siltstone, silty shale, and sandstone


Unit_Desc:
Quartz-pebble conglomerate that occurs in the middle part of section


Unit_Desc:
Thick graded beds of coarse-grained feldspathic metasandstone and metaconglomerate interbedded with dark graphitic metasiltstone and slate. Metaconglomerate consists of distinctive angular grains and pebbles of potassium feldspar, blue and gray quartz, and leucogranite


Unit_Desc:
Boulder conglomerate that consists of rounded leucocratic granite in a matrix of quartz and feldspar; large boulders of slate and dolomite occur locally


Unit_Desc:
Quartz-mica schist and phyllite with lens of metaconglomerate grades upward into metagraywacke and meta-arkosic conglomerate interbedded with sandy slate and quartz-mica schist


Unit_Desc:
Dark graphitic and sulfidic schist interbedded witth metagraywacke, metaconglomerate, and muscovite schist


Unit_Desc:
Thin beds of carbonate rocks, limestone, and sandy limestone within argillaceous shale


Unit_Desc:
White vitreous quartzite, sandstone, and polymictic pebble conglomerate


Formation:
Roaring Fork Sandstone, Longarm Quartzite, and Wading Branch Formation, undivided


Unit_Desc:
Greenish-gray calcareous shale interbedded with oolitic limestone


Unit_Desc:
Limestone with greenish-gray shale near the base and top


