Preliminary geologic map of the Greenville Quadrangle, South Carolina, Georgia, and North Carolina

Abstract

Expanded Explanation Greenville Quadrangle Blue Ridge Rocks Stratified Units Gnt Nantahala Slate, Bark gray slate and mica schists^localljr containing feldspathic quartzita pCgs Great Smoky Group, largely feldspathic metasandstone, medium to thick pCgss bedded, with interbeds of feldspathic quartz -nica schist or pray pCgsm phyllite, includes some beds of qu->rbz -feldspar pebble conglomerate; pCgss, sericite schist with garnet and locally prominent biotite porphy rob lasts;pCgsm, aluminous schist pCge Bifctite gneiss>>dark gray,fine to -medium grained, massive to indistinctly layered . Interlayered with mas? ive to thin bedded ,fine-drained metagraywacke pCpca Amphibolite, dark pray to black, fine to medium grained, interlayered with gabbro, ultra mafic rocks and locally biotite gneiss pCpcp Biotite schist and gneiss,variably textured and layered, contains felsic and mafic s8»ffrenations, consists mostly of qmartz, oligofclas*, biotits, sericite and chlorite Cr Coweeta Groupj Cr, Ridgepole Mountain Formation, light to medium gray Ccc quartzite, chlorite --Tuscovite quartzite and coarse biotite chlorite Cp schist and ne^agraywackej Ccc,Coleman River Formation ,medium to dark gray , thinly layered impure met-, sands tone, inter layered with muscovite biotite schist, and meta conglonerate; Cp, Persimmon Creek Hneisa, variably" foliated oligoclas«-quartz -epidote-biotite gneiss, interlayered with metagraywacke qv Quartzite, lieht pray medium -fine -.^rained ,localljr muscovitic mi Migmatite, leucoc atic granitic material injected into variable paragneisses pCtf Tallulah Falls Formation; pCtf Tallulah Falls Formation undivided ^of pGte ilfcltiawt graywacke, quartsite, aluminous schist^amphibolite, add two pCtq mica schistj pCte. medium to dark ejddote rich quartzits$ pGta, aluminous }.-Gta two mica -quarts -plagioclas* schistj pGtq,interlayered qu-irtsite and schist, qu^xtsite contadns quartz,plagiaclase, muscovite, K spar, am.d biotite as principal nineralsj schist contains muscovite, biotite, quarts and plagioclasepCw Wiley Gneias> Medium gray, coarse -grained K spar -h lajioclas«-quarts two mica augen gneiss pCtz Toxawny Gneiss, Mediim pray to dark pray to coarse -grained, layered to r-iascive g^.eiss containing plagioclsse microcline -quarti-biotite-_..____e]'idotfi-^.gnetite; locally feldspar occiirs a? augen, ]>eg;natLtev« cormn

Physiographic divisions and differential uplift in the Piedmont and Blue Ridge

“…Figure 22 is an outline map of part of the Mountain highlands made by tracing the boundaries between sparse and dense contours. The map also shows the Brevard zone (Hadley and Nelson, 1971;Goldsmith, Milton, and Wilson, 1978;Nelson and Clarke, 1978) and the outcrop of one map unit referred to as gneiss and migmatite on the map of Hadley and Nelson (1971). This unit seems to be a preferred rock type for the formation of intermontane basins, although it is not known to be particularly nonresistant.…”

Defining the Timing, Extent, and Conditions of Paleozoic Metamorphism in the Southern Appalachian Blue Ridge Terranes of Tennessee, North Carolina, and Northern Georgia

“…Also, these WBR units lie stratigraphically above continental (Laurentian) basement, so they are interpreted to have been deposited on either the partially rifted continental shelf or thinned transitional crust (Figure 12a). The CBR and EBR terranes contain some mafic and ultramafic units interpreted as MORB crust (Hopson, 1989; Nelson et al., 1998; Peterson et al., 2009; Raymond et al., 2003; Settles, 2002; Swanson et al., 2005). In addition, minimal continental basement has been identified, apart from isolated basement inliers in both the Cartoogechaye (Trimont Ridge massif, Eckert, 1984, 1988; Hatcher et al., 2004) and western Tugaloo terranes (Toxaway and Tallulah Falls domes).…”

“…E. Merschat & Cattanach, 2008;C. E. Merschat & Wiener, 1988;Eckert et al, 1989;Espenshade et al, 1975;Goldsmith et al, 1988;Hadley & Goldsmith, 1963;Hadley & Nelson, 1971;Hatcher, Bream, & Merschat, 2007;Hatcher & Goldberg, 1991;Hatcher & Merschat, 2006;Higgins et al, 2003;Hopson, 1989;Nelson et al, 1998;Osberg et al, 1989;Rankin et al, 1972;Settles, 2002;Steltenpohl & Moore, 1988;Tull, 2007;Tull & Holm, 2005). On this map, the sillimanite II isograd is indicated by the absence of muscovite and the appearance of K-feldspar.…”

“…Monazite U‐Pb ages shown are weighted means of all concordant analyses for each sample, which are shown on Figure 5. Metamorphic isograds derived from multiple studies (A. J. Merschat, 2003; A. J. Merschat et al., 2017; Butler, 1991; Carpenter, 1970; C. E. Merschat & Cattanach, 2008; C. E. Merschat & Wiener, 1988; Eckert et al., 1989; Espenshade et al., 1975; Goldsmith et al., 1988; Hadley & Goldsmith, 1963; Hadley & Nelson, 1971; Hatcher, Bream, & Merschat, 2007; Hatcher & Goldberg, 1991; Hatcher & Merschat, 2006; Higgins et al., 2003; Hopson, 1989; Nelson et al., 1998; Osberg et al., 1989; Rankin et al., 1972; Settles, 2002; Steltenpohl & Moore, 1988; Tull, 2007; Tull & Holm, 2005). On this map, the sillimanite II isograd is indicated by the absence of muscovite and the appearance of K‐feldspar.…”

A portable borehole extensometer and tiltmeter for characterizing aquifers

“…The field site used to test the Tilt‐X is a well field within the South Carolina Botanical Gardens in Clemson, South Carolina (Figure ). The regional geology consists of highly deformed, high‐grade metamorphic rocks of the inner Piedmont physiographic province [ Nelson et al ., ]. The study site is underlain by medium‐grained biotite gneiss with strong foliation that strikes northeast and dips between 40° and 80° to the southeast [ Svenson et al ., ].…”