Compiled geologic map of the Wilton 7.5-minute quadrangle, Granville, Vance and Franklin Counties, North Carolina

7837'30" 7830'00" EXPLANATION 3615'00" SEDIM ENTARYUNITS 3615'00" Qal:Quaternarya luvium :Unconsolidated,poorly-sortedandpoorlystratified,tantolightgraydepositsofgravel,sand,Qal silt,andclay.Similartostratifiedterracesalongstreams. Trcs/si2-sandstonewithinterbeddedsiltstone:whitish-yelowtograyish-pinktopalered,coarse-toverycoarse-grained,cross-bedded,lithicarkosethatfinesupwardsthroughyelowtoreddish-brown,medium-tofine-grainedsandstone,to reddish-brown,burowedandrootedsiltstone. cgl(conglom erate)-matrix-supportedcobbleconglomeratewithlithicclastsupto20cm;clastsaresubroundedtorounded,andcomprisequartz,red-brown,fine-grainedsandstone,whitemicaphylonite,andmoderatelyfoliated,coarse-toverycoarse-grained,biot�chlorite�whitemicagranitetodiorite;matrixiswhitishtotanverycoarse-grainedsand. Trcc-conglom erateandsandstone:Reddishbrown,clast-supportedcobbleandpebbleconglomeratewithsubordinateTrcc conglomeratic,arkosicsandstone(subarkose),arkose,andsandymudstone.Subroundedtosubangulargranticlithic clastspredominate.Localy,distinctivegravelandcobblesofrosequartzoccuraslagdepositsinresidualsoil. FAULTROCKS Trsb-silicifiedbreccia:Lightgraytowhite,slicfiedrockthathasbeenmultiplybrecciatedandannealed.ContainsTrsb angularclastsofprobablepre-TriassicrockalongtheJonesborofault. INTRUSIVEROCKS Jd-diabasedikesandsills:Steeply-dippingtoverticaldikesandhorizontaltoshalow-dippingsilsofgraytobluish-black,fine-tocoarse-grained,localyporphyriticplagioclasediabase,thatmaybeolivine-bearing.Solidlineswhereobserved,dashedwhereinfered,anddotedwhereconcealed.Redcirclesindicateareasofabundantfloatinferedtobenear originallocation. PPwg�GraniteoftheWiltonpluton:Grayish-orangetopinkish-orange,medium-tocoarse-grained,weaklyfoliatedPPwg orlineatedtononfoliated,leucocratic(CIlessthan15)biotitegranite.Localymolybdenitebearing. qv-veinquartzandquartzbreccia:Whitetolightgray,coarse-grained,highlyfracturedveinquartzandbrecciatedvein qv quartz.Typicalyassociatedwithshearzones;localycontainssericiteand/orchloritephyloniteclasts.Down-dipslickenlinescommononfractureplanes. PzZfp-Felsicporphyry:Buftowhitish-tan,porphyritictoaphantic,leucocratic(CIlessthan1)dacitetorhyolite(?)PzZfp withlessthan5-10mmquartzandfeldsparphenocrysts. M ETAM ORPHICROCKS Jbz-contactm etam orphosedTriassicsedim entaryrock:Thisrockispresentatornearthecontactwiththediabase Jbz sil(laccolith).LithologicalyequivalenttosurroundingTriassicsedimentaryrockmapunitexceptthemetamorphosed varietyismediumtodarkgray,todarkmaroonprobablyfromdarkred-blackhematiticcement.Sedimentarytexturesand mineralogyaregeneralypreserved.Secondarysericitepresentinthematrixofsomecontactmetamorphosedsandstones. CarolinaTerane CZgd-m etagranodiorite:Grayish-white,coarse-grained,unfoliatedandlocalyfractured,leucocratic(CIlessthan15), blue-grayquartzbiotite+/-hornblende(?)metagranodiorite. CZbto-Hornblende-bearingbiotitetonalite:Leucocratictomesocratic(CI-15-30),intermediatelightgreentogray-green,todarkgray-green-black,medium-grained,metamorphosedhypidiomorphicgranularbiotite�hornblendetonaliteandminor granodiorite.Crosscutbymm-tocm-scalemetamorphosedtrondhjemite,monzonite,andgranodioritedikes.Commonlyformshilsideboulderoutcropsandstreamwaterfals,aswelasmassiveblufoutcropsalongtheTarRiver.Saussuritiedand serticizedplagioclaseandblue-grayquartzphenocrystsformleucocraticdomainsthatcontrastwithmesocraticchloritizeddomainsofhornblendeandbiotite.Localy,aweak�swirly�compositionallayeringappearsinweatheredoutcropsthathave adarkcoloration.Somemm-scaleblack�clots�thatrangeupto1cmmayberelicthornblendeorrecrystalizedgreenstone clasts.Cm-tom-scaleenclavesofgreenstone,eitherveryfine-graineddioriteorandesite,areconspicuousthroughoutthe pluton.M aybethewesternequivalentoftheGibbsCreektonalitedirectlyacrossandeastoftheDeepRiverriftbasin. CZdq-quartzm etadiorite:Lightgray,whiteandblack,fine-tomediumgrained,+/-accessoryhornblende,biotite,quartzmetadioriteandsubordinatemetagranodiorite.Plagioclasepartialyreplacedbysericiteandepidotegroupminerals;chloritereplacesbiotiteandhornblende.Quartzcomposes5-25%oftherock,localyaslightbluetograyphenocrysts.Generalynon-foliatedbutlocalizedweaklyfoliatedvarietiesoccur. CZm d-hornblendem etadiorite:Gray,todarkgraytogreen-black,fine-tocoarse-grained,quartz,hornblendemetadiorite withsubordinatehornblendemetagabbro.Includesminormetatrondhjemite(quartz-andesite)dikes.SimilartoCZgbdi,butquartzhornblendemetadiorite,andlocalyhornblende,quartzmetadioritemakeupthebulkoftheunit.Accessorypyritelocalypresent.Accessorymagnetiteassociatedwithchloritizedhornblendeiscommon,andepidotegroupmineralscommonlyreplaceplagioclase(albitetoandesine).Generalynon-foliatedbutlocalizedweaklyfoliatedvarietiesoccur.Typicalyincludes metabasaltandmeta-andesitegreenstone.(BasicalyaquartzbearingversionofCZgbdi). CZgbdi-hornblendem etagabbro/diorite:Darkgray,togreen-black,fine-tocoarse-grained,hornblende,metagabbro,withsubordinatehornblendemetadiorite.Includesminorfine-grainedmetatrondhjemitedikes.Accessorypyritelocalypresent.M etadioritelocalycontainsaccessorytominoramountsofquartz.Accessorymagnetiteassociatedwithchloritizedhornblendeiscommon,andsericiteandepidotegroupmineralscommonlyreplaceplagioclase(albitetoandesine).Poiklitichornblendephenocrystswithplagioclaseinclusionslocalypresentincoarser-grainedvarities.Generalynon-foliatedbut weaklyfoliatedvarietiesoccur.Typicalyincludesmetabasaltandmeta-andesitegreenstone.(LithologicalysimilartoCZtc mappedbyBlakeeastoftheFishingCreekfault). CZan-quartzm eta-andesiteandm etatrondhjem ite:Finetoveryfinegrained,lighttomediumgraytogray-greenhornblende,quartzmeta-andesiteandmetadiorite,metatrondhjemiteandsubordinatefine-grainedmetadiorite.Chloritepartialyreplaceshornblende,andsericiteandepidotegroupmineralspartialyreplaceplagioclase.Generalynonfoliated,butfoliatedandhighlyfracturednearthecontactwithTrcc. CZphs-sericitequartzschistphyliteandphyllonite:Probablyderivedfromshearedfelsicintrusiverocksandpossibly felsicpyroclasticrocks.Includeshighlyfracturedquartzoserockandminoramountsoffelsicintrusiverock. CZgc-GibbsCreekpluton:Lightgreentogray-green,fine-tomedium-grained,leucocratic(CIlessthan20)biotite+/�hornblendemetagranodioritethatdevelopsaporphyriticfaciesandanequigranularfacies.Chloriteandwhitemicaindicatea metamorphicoverprintofbiotite,hornblende,andfeldspar.M ilimeter-tocentimeter-scale,relictfeldsparphenocrystssuggest aporphyritictextureinwesternportionsofthepluton,andlocalythroughoutthepluton.Easternportionsoftheplutonare equigranularinrelictphaneritictexture.Cm-tometer-scaleenclavesoffoliatedfine-grainedamphibolitetoepidosite,andfoliatedbiotite-chloritemetagranitoid,areconspicuousthroughoutthepluton,especialyinitscentralportions.Fourpodsof meta-ultramaficrocksalsoformenclaves. CZgcf-foliatedGibbsCreekpluton:Foliatedandlocalylineatedequivalentofthemetagranodiorite.Chloriteandwhite micadefineametamorphicoverprintuponbiotite,hornblendeandfeldspar,andareweldevelopedinphylonitictomyloniticfractureandshearfoliationzones.Lessfoliatedrocksdevelopasheenduetofine-grained,orientedwhitemicaoverprintoffeldspar.M ilimeter-tocentimeter-scalerelictfeldsparphenocrystsdefineaporphyroclasticmicrostructure.Localyzonesof slicaandepidotethatformslicfiedridgesoverprintthefoliatedrocks,especialyinitswesternportions. CZct-Carolinateranem etagranitoid:Orange-tantopinkishtan,fine-tomedium-grained,highlyfractured,leucocratic(CIgeneralylessthan5),biotite-bearingmetatrondjhemitetometagranodiorite.Localy,biotitecanincreaseinabundance and/orbereplacedbychlorite.Graytobluishgrayquartzphenocrystsareconspicuous,andthemetagranitoidislocalyporphyrtic.Zonesofslicficationandpyritizationarepresent. CZdi-m etadiorite:Grayish-white,coarse-grained,localyfractured,mesocratic(CIlessthan50),metadiorite.Localy containsbluishgrayquartzinmeta-quartzdiorite. CZm g-m etagabbro:Darktomediumgreen,medium-tofine-grained,melanocratic,localyplagioclaseporphyritic metagabbrodike.Localy,chloriteandwhitemicamarkfractureandshearfoliations. CZcu-m eta-ultram aficrocksundivided:Darkgraytolightgreen,fine-tocoarse-grained,massivetofoliated,talc+ actinolite+serpentineschist,serpentinite,andactinoliterock.M ayoccurindependentlyorasalithologicassemblage withintheTarRiverpluton. CZfp-felsicphyllonite:Buftogray,fine-grained,welfoliatedandlocalylineated,leucocratic(CIlessthan5),felsictoquartztic whitemicaphylonite. 3607'30" 3607'30" INDEXTOGEOLOGICM APPING CZtc-TabbsCreekm eta-igneoussuite:Variablygreencolored,fine-tomedium-grained,variablyfractured,greenstoneto 7837'30" 7830'00" metagabbroandmetadiorite.Crosscutbyfine-tocoarse-grainedbiotitehornblendemeta-quartzdioritetometagranodiorite formsenclaveswithinmorefelsicrocks,orexhibitvariablyorienteddikesofmorefelsicrocks. CZtcf-foliatedTabbsCreekm eta-igneoussuite:Foliatedequivalentofvariablygreencolored,fine-tomedium-grained,variablyfractured,greenstonetometagabbroandmetadioriteandcrosscutingfine-tocoarse-grainedbiotitehornblende Basetopographicmapisdigital meta-quartzdioritetometagranodiorite,andlocalymetatrondhjemitetometagranite.Localychloriteandwhitemica rastergraphicimageofthe definefractureandshearfoliations. Wilton7.5-minuteUSGSquadrangle(1977). CZgdf-foliatedTabbsCreekm etagranodiorite:Gray-green,fine-tocoarse-grained,welfoliatedandlineated,leucocratic(CIlessthan15)metagranodiorite.Chloriteandwhitemicadefineavariablydevelopedprotomylonitictomyloniticfoliationand stretchlineation.Relictbluishgrayquartzandfeldspardefineaporphyroclasticmicrostructure.Alsoincludeslightgreentodarkgreen,fine-tomedium-grained,massive,chlorite-epidote-richgreenstoneandlocaly,green,fine-grained,welfoliatedandlineated,chloritephylitesouthoftheTarRiver. CZvgr-Felsicm eta-intrusivesuite(VanceCountypluton):Leucogranite,quartzmonzonite,trondjemiteandgranodiorite.Generalyleucocraticrangingfrompalepinktolighttanandlightgray;medium-toveryfine-grained.Sericitepartlyreplaces perthiticmicrocline,andsericiteandepidotegroupmineralspartlyreplaceplagioclase.Plagioclaserangesfromalbiteto oligoclase.Biotiterangesfromlessthan10%toaccessoryamountsinleucocraticunites;accessorymagnetitelocalypresent.Generalyunfoliatedbutincludeslocalizedfoliatedzones.Outcropsarerare,andunitmappedprimarilyonthepresenceoffloat cobblesandquartz-richresiduum. CZvgf-Foliatedequivalentoffelsicm eta-intrusivesuite(VanceCountypluton):Includespalegreentolightgray+/�chlorite,sericitequartzphyliteandphylonite.CompositeS-Cfabric,andspacedcleavagecommon.Includesenclavesof greenstoneconsistingofgray-greentogreen-blackmetabasaltandmeta-andesite(CZab). CZphc-chloriteschist,phylliteandphylonite:Lightgreenish-graytodarkgreen,phyliticrocksderivedprimarilyfrom shearedintermediateandmaficintrusiverocks(CZdq,CZdi,andCZgbdi);includeschlorite,sericitephyliteandphylonite;and,sericite,quartzo-feldspathicmylonite.M ylonticfabriclocalydevelopedasmilimeter-scalediferentiatedmicaceous andquartzo-feldspathiclaminaealongwithflatenedandrotatedpolycrystalinequartz-plagioclaseaggregates.Includesthinzonesoffoliatedmeta-quartzdiorite(Czdq)andmetagabbro(CZgbdi).S-Ccompositefabriccommon,andhighlyfracturedandbrecciatedvarietiesoccurneartheFishingCreekfault. FallsLakeTerane CZfs-felsicschist:Orangish-gray,fine-tomedium-grained,welfoliatedandlineated,andthinlybanded,biotite-whiteCZfs micaschisttogneiss. CrabtreeTerane CZrcg-RuinCreekgneiss:Variablytan-orangetogray-orange,fine-tomedium-grained,welfoliatedandlineated,CZrcg porphyroclasticK-feldspargraniticgneiss.WhitemicaandrecrystalizedK-feldspardefinetheshearfoliationand stretchlineation. CZm cg�M iddleCreekgneiss:Finetocoarse-grained,gneissictoschistose,localylineated,mesocratic(CIlessthan30),CZmcg biotitequartzdioritictogranodiorticgneiss.Interlayeredwithpink-graytoorange-tan,finetomedium-grained,localylineated,leucocratic(CIlessthan10)whitemicabiotitegranitoidgneiss,andfinetomedium-grainedamphibolticgneiss. CZm ca�M iddleCreekgneiss,m aficfacies:darkgrayishblacktodarkgreen,finetomedium-grained,foliatedandlineated,CZmca layered,epidote-bearinghornblendegneissandamphibolite.Localycontainsopaquemineral-richmetapyroxenite. RaleighTerane CZflg-Fallsleucogneiss:Pinkish-graytoorange-tan,fine-tomedium-grained,weaklytomoderatelyfoliated,stronglyCZflg lineated,leucocratic(CIlessthan5),biotite-magnetitegraniticgneiss. NorthCarolinaDepartmentofEnvironmentalQuality ThisGeologicmapwasfundedinpartbytheUSGSNationalCooperativeGeologicMappingProgram NorthCarolinaGeologicalSurvey EnergyGroup OpenFileReport2016-21JennyKelvington,ExecutiveDirectorKennethB.Taylor,StateGeologist 70 Jd 85 CZphc qv CZgb 90 84 75 73 70 86 74CZmd CZmd 35 70 80 80 52 62 CZdi CZvgf 81 70 82 71 81 65 80 CZtg CZdq 50 Qal 59 Jd 72 80 CZvgr 85 CZgd 84 50 75 75 75 5 2 75 70 Trcs/si 84 79Qal 60 60 PzZfp CZan JdCZbto 80 85 75 85 75 50 80 DU60 CZvgf CZvgf 86 85 Trcc 80 8085 70 76 85 85 54 45 CZtcf86 56 72 Jd 49 52 70 B' Jd65B Qal 35 Jd 66 80 60 50 Trcc Jbz CZvgr CZdi 87 WT02-3956FandM 85Jbz Jbz 49 62 49 42 40 74 CZtc 78 88 Wm -1 Jd 85 Jd 65 74 88 CZphs 12 12 85 50 59 65 55 40 78 Jd 708653 CZgbdi 585 52 55 61 50 27 37 658758 Wf-180 75 80 51 60 70 K-291 85 57 79 6 80 50 50 64 5280 8511 5 79 85 86 55 68 70 76 CZfp CZdi 42 72 8585 85 Jd Jd 40 CZgcf 72 5661 Trcc 79 64 66 54 62 64 66 77 80 65 88 Jd 40 6267 70 71 46 68 886 52 73 5168 80 12 42 87 67 82 CZtc15 16 Jbz 48 60 65 55 67 CZtcf CZbto 46 59 6750 76 80 79 72 40 45 56 55 61 66 Jbz 65 15 85 50 45 58 60 50 Jd 5 80 7354 7666 80 80 82 70 Qal 80 64 75 7575 55 Jd88 7875 75 57 Jd 59 77 6585 70 74747559 85 CZdi Qal 875 52 63 55 55 70 2 Jbz 80 Jd Trsb 57 76 72 Jd CZtcf Trcs/si 50 80 Jd 60 74 10 52 74 75 CZgc68 48 87 82 8525 50 74 74 50 76 80 CZgcf 55 20 50 85 85 73 56 69 Qal cgl Trcs/si 2 Schmidtnetequal-areaplotofcontoured Schmidtnetequal-areaplotofcontoured polestoregionalandshearfoliations mineralandstretchlineations(n=428)Contourinterval=2 (n=17)ContourInterval=2 Jd Jd Schmidtnetequal-areaplotofcontoured UnidirectionalRoseDiagramofJoints polestobeddinginTriassicsediments N=233(n=15)ContourInterval=2 1:24,000SCALE 10.50 1 M iles 1,000500 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 NORTHCAROLINA Feet 6 126' 107M ILS 10.50 125M ILS Kilometers UTMGRIDAND1974MAGNETICNORTH CONTOURINTERVAL10FEET DECLINATIONATCENTEROFSHEET M APLOCATION crosssections-noverticalexaggerationmeasurementinkilometers,referencemeansealevel CZgb-m etagabbro: Blacktograyish-blackmelanocratic,fine-tomedium-grainedmetagabbro.Relict CZgb pyroxeneandmetamorphichornblendecommon;magnetitepresentinsuficientamountstomaketherockdistinctlymagnetic.ShearedvarietiesalongthecontactwiththeFishingCreekfaultzoneincludemyloniteandblastomylonitewithpinkfeldsparporphyroclasts;and,chloriteplagioclasephylitetypicalywithcompositeS-C Trcs/si 2 56 65 55 74 78 CZgcf CZdi CZgcf 72 67 56 72 65 70 85 60 67 86 70 69 5275 61 Jd 50 70 68 80 20 75 78 CZgcCZgc 70 40 4550 88 71 CZgcf 38 42 85 48 CZgc 52 70 79 64 41 45 71 49 6761 70 50 62 65 55 75 5565 78 59 55 60 80 2 76 CZgcf 61 75 CZmg 59 41 A 84 7879 5562 6566 68 68 75 55 77 7082 7658 60 64 75 CZgcf 7489 77 65 78 75 88 61 CZcu 60 Qal 55 68 56 61 39 Qal 7560 CZgcf WT02-3660 CZgcf 69 Jd65 65 61 86 CZgdf 78 57 Jd 85 5555 6980 72 68 Jd 75 7 49 5570 80 Qal 47 4557 53 8081 85 62 45 74 80 61 76 80 Trcs/si 2 67 63 56 85 65 43 70 67 50 WT02-449283 80 76 80 Qal 74 84 67 CZcu 69 8080 77 50 79 CZdi 84 63 63 CZgcf TR01-248 70 70 74 80 70 54 74 CZgc CZgcf A' 85 WT02-3560 76 Jd 80 35 Jd CZcu 30 CZgcfQal 50 74 38 55 70 8 CZcu 89 CZgc 56 86 72 Qal 87 55 76 69 CZcu 65 74 79 52 60 75 83 86 75 Jd 6356 Jd CZgcf8072 768 CZrcg 8781 70 47 52 25 34 79 666837 842560 250 CZgdf 8 46 34 5087 Qal 75 7772 45 87 69 CZgcf 63 75 71 88 68 CZgcf CZcu CZmg5957 Jd 636385 87 Qal D 57 47 CZrcg U 65 77 D 66 CZgc TR01-526 54 PP 7885 CZcu82 Trsb wg 57 U 83 82 68 37 8271 86 70 CZgcf Qal 83 82 CZcu 25 26 CZgcf707569 57 Qal5969 85 4277 868872 Qal 30 66 80 31 53 CZcu 88 85 75 CZgcf CZgc78 Jd 70 76 Jd CZgc 18 60 70 Jd cgl 77 3267 58 69 7170 CZgcf Qal CZcu 72 76 Jd Trcs/si 2 CZum 47 D5 CZcu Jd 5575 U Jd 81 747431807382 TR01-396 60 Jd 80 85 CZgcf13 76 64 CZgcf Qal 73 7986 30 66 61 42 83 75 81 cgl CZgcQal5 CZgcf 80 69 PP wg D 71 U CZrcg Trsb42 7075 CZcu 80 18 85 Qal 65 71 D? 60 74 W-grt 80 74 68 73 85 50 U? 65733585 808580 73 Jd 3217 12 CZgcf 65 5085 CZmca81 28 66 CZcu8378 72 13 52 W32T-1026 Qal 79 Qal 77 13 84 73 Jd 88 CZfs 80 85 70 75 60 85 TR99-4 80 CZmcg 85 3325 85 70 Qal 38 80Qal 70 67 77 CZct 65 32 54 46 CZfu CZmcg 80 85 CZflg 80 70 CONTACTS Lithologiccontacts-Solidwherelocationknown, dashedwhereinfered,dotedwhereconcealed. Diabasecontacts-Solidwherelocationknown,dashedwhereapproximate,dotedwhereconcealed. FAULTS XD ? O U Faults-Solidwherelocationknown,dashedwhereinferred,dotedwhereconcealed.Dindicatesdownthrownblock,Uindicatesupthrownblock.Teethonfaultindicateductilethrustfault.Oncrosssection,Xindicatesmovementawayfromtheobserver,Oindicatesmovementtowardstheo shearzonecontactand/orzoneofductileshearing EXPLANATIONOFM APSYM BOLS Observationsitesarecenteredonthestrikebarorareattheintersectionpointofmultiplesymbols. strikeanddipofinclinedbedding strikeofvertical inTriassicsedimentaryrocks CorC'foliation 35 strikeofinclinedbedding 22 strikeanddipofinclined inTriassicsedimentaryrocks foliationinenclave horizontalbeddingin strikeofvertical Triassicsedimentaryrocks foliationinenclave trendofdiabasedike-dipunknown 17 strikeanddipofinclinedfracturedsurface45 strikeanddipofinclinedfoliation(Srs) strikeofverticalfracturesurface strikeofvertical 12foliation(Srsv) bearingandplungeofminerallineation andmineralstretchlineation 32 strikeanddipofinclined 23CorC'foliation bearingandplungeofslickenline massivequartzlocation observationstationlocation slicifiedbreccialocation Jdstationlocation abandonedquarrysite OTHERFEATURES WT-1026 whole-rockgeochemicalsamplelocation Wooten Grimes Blakeandothers Philips Wiandtanachchi Robitaile* Blake ADJOINING7.5'QUADRANGLES *Observationstationlocations withoutstructuraldatanotprovidedforRobitailestudyarea. Berea Oxford Henderson Stem Wilton Kitrel Creedmoor Grissom Franklinton LateProterozoic Late Late LateProterozoictoCambrian toPaleozoic(?) Pennsylvanian Jurassic Triassic Triassic Quaternary Wilton7.5-minuteQuadrangle,NCGSOpenFileReport2016-21 FISHINGCREEK B FISHINGFAULT B' CREEK WEST EAST 0CZtcf 0 Qal PzZfp CZvgr CZdiTrcs/si2 Jd CZvgf CZtcf -0.5km CZgd CZgcf CZfp Jd CZtc CZvgr CZvgr CZtcf -0.5kmCZtc CZtc CZvgf -1.0km -1.0km A FISHING GIBBS DUCTILE A CREEK CREEK FAULTWNW ESE0 0 CZgc Qal CZgcf CZcuCZgcf JdJd CZcu XO Jd CZgc -0.5km CZgcf CZgc CZgdf CZrcg -0.5km CZmg CZgcCZgcf CZgc CZgc CZgcf -1.0km -1.0km g N.C. COM PILEDGEOLOGICM APOFTHEWILTON7.5-M INUTEQUADRANGLE,GRANVILLE,VANCEANDFRANKLINCOUNTIES,NORTHCAROLINA GeologybyDavidE.Blake,KennethR.Robitaile,CindyPhilips,ChannaWitanachchi,RichardM .Wooten,WilGrimes,JeremyD.Pesicek,andBenjaminD.Grosser DigitalrepresentationbyMichaelA.MedinaandCindyM.Phillips. 2016 Disclaimer:ThisOpen-Filereportispreliminaryandhasnotbeen reviewedforconformitywiththeNorthCarolinaGeologicalSurveyeditorialstandardsorwiththeNorthAmericanStratigraphicCode.Furtherrevisions orcorectionstothispreliminarymapmayoccurpriortoitsreleaseasaNorthCarolinaGeologicalSurveymap. ResearchpartialysupportedbytheU.S.GeologicalSurvey,NationalCooperativeGeologicM appingProgramunderSTATEM AP(Awards-2001,01HQAG0061;2002,02HQAG0043)andEDM AP(Award�1998,98HQAG2100toRobitaile).Additionaldatacolectedin2003.Thismapandexplanatoryinformationissubmitedfor publicationwiththeunderstandingthattheUnitedStatesGovernmentisauthorizedtoreproduceanddistribute reprintsforgovernmentuse. CZgd CZtg CZbto CZtg-Unfoliatedbiotitem etatonaliteandm inorm etagranodiorite:Variablygreen-greytogrey�white,mediumtocoarse grainedbiotitemetatonalite,andmetagranodiorite.Quartzisabluishtolocalylightgrey,withplagioclasecommonlyshowingalterationtoepidotegroupminerals. CZdq CZmd CZgbdi CZan CZphs CZgc CZgcf CZct CZdi CZmg CZcu CZfp CZtc CZtcf CZgdf CZvgr CZvgf CZphc CZfu-ultram aficrocks(undivided):Variablyalteredultramaficrocksincludingmetapyroxenite,actinolite-chloriteschist,CZfu andtalcschist. CZum�Metaultram aficrock:Darkgreentoblack,finetocoarse-grainedmassivetofoliatedtalc-chlorite-actinoliteschistCZum andactinoliterock,localywithoctahedralmagnetitecrystals.