Geologic map of the Cary 7.5-minute quadrangle, Wake and Durham Counties, North Carolina

DEPARTMENTOFENVIRONMENTALQ UALITY NORTHCAROLINAGEOLOGICALSURVEYKENNETHB.TAYLOR,STATEGEOLOGIST ThisgeologicmapwasfundedinpartbytheUSGSNationalCooperativeGeologicMappingProgram OPENFILEREPORT2016-02 Explanation 7852'30" 7845'00" 3552'30" 3552'30" Trcsc64 Fe CZpbg CZbr1 Qal CZbr1 CZslg Qal 6 7855 12 CZrg CZrg 198 Trcs/c CZpbg CZslg4855586211 Trcs48?69Fe CZrs7139 A10351058 CZslg5596 Jd139 Qal35509 CZbr1 CZbr165 62 42A'483235Jd16 63 CY96-1633A CZmd CZslgTrcs/c70 CY96-1633BTrcsi/s Jd12 9 13 Qal42439 Trcc CZrg Jd 4249 81110 42 110 47426449 12 Jd841 6 1844 46414751 14 48 CZslg155356 A" Qal Qal 15 CZpbg CZpbg46 209 Jd 4439 Trcsi/ 50 D 48 CZslg ? 10 s 54 Jd 205 U Qal 69 5238 63 426255 CZrg 5754 56 Qal 74 15 15 Jd CZbr1 43 4767 48 DU CZbr1 695047 67 61 48 59 54 Qal 6268 10 Trcs12 65 Trcs 62 CY96-1750 51 51 57 CZslg6435 WR94-835 52 10 CZbr152 51 564060 70 6252 60 40 61 505412 Trcs/c5755425839 36 CY96-1931-167 ?37 Qal CY96-1931-2 61 3 CZbr1 5051 26560 CZtcaCY96-1938B58 17665675058 CZslg5246 49 Jd50 4559 Trcs/si25461 ?125155 582043 Qal4944 51 CY96-1807 CZbr147 DU 48 6155Trsc6558 2643 Qal58 4848 8 Qal CZpbg55 39 1240554555 CZrg CZslg D1570 U65 51634563515558608466 54 Trcs/c17177 Trsc56 CZslg 4 Qal Trcs 5 Jd 7550456558 6951 Trsc 52 5451 68 CZt ca CZpbg Qal CZrg Trsc 755351 31 CZs 60 40 4431475150 lg Trcs 18 Trcc 54 Trsc 52556050 65 Trsc 5160375246CY97-2036 68CZbr1 3470 4449385154515548 5763 62 50 80 D U 53 9 CZbr2 59 7066 606555684862 61 52 B Qal Jd 12 23Trsc 6140 49 727074557982667016 8163 58 6659407150 CY97-20744868645665 52 5062 59555857586145507275 75CZbr1 5052 CZrg 55 66 6 Trcs/si2 33 15 131010 62256062186041755773 CZpbg 80 58 71 3753 43 355758CZbr1 CZpbg 8681 68 768584 778878? 6570 65 4553 CZtca B' 8 73 66 55 37 24 12 8069 66 38 8075 62 59 81 52 52 Qal 56 72 Jd 1315 122025 Jd Trcs/c 352237 52Trsc 6265 78 72CZcbp 72CZbr2 40546464 395171 55 73 795251CZbr1 65 CZrg 61 3545'00" 19 27 Trcs 2510 13 Trcc Trsc 527149485255785649CZpbg8384 788188797088 698877 81 4568654972487247686352726759764554 44356861444357608146D U 33466148 4377 7465 475449815861555177555567CZpbg 625967 51495868 6076 CZpbg 74504465LEESVILLEFAULT 51CZccg 3545'00" 7852'30" 7845'00" Pre-MesozoiccrystallinerocksintheeasternportionoftheCaryQuadranglerepresenttheeasternmostexposuresoftheLateProterozoictoCambrianCarolinaterane.Asmall portionoftheLateProterozoictoCambrianCrabtreeteraneislocatedintheextremesoutheastcornerofthequadrangle.TriassicsedimentarylithologicunitsoftheDurhamsub-basinoftheDeepRiverMesozoicriftbasinunderliethewesternportionoftheCaryQuadrangle. UltramafictofelsicunitsoftheeasternmostportionoftheCarolinaterane(Carysequence,Parker,1979;Caryformation,Hibbardetal.,202;Farar,1985a)havebeen metamorphosedtothechloritezoneoftheuppergreenschistfaciesduringlatePaleozoiccontractionaltectonothermalactivityandearlyMesozoicrifting.ThesmallportionoftheCrabtreeteraneexperiencedamphibolitefaciesmetamorphism.OnlyTriassicsedimentaryrocks,Jurassicdiabasedikesandsills,andsilicifiedcataclasiteareunmetamorphosed.AlthoughLateProterozoictoCambrianvolcanogenicrocksweresubjectedtolow-grademetamorphism,locallyundeformed,aswellasfoliatedandcataclasticallydeformed rocksoftheeasternmostCarolinateranepreserverelictplutonicandvolcanicigneous,aswellassedimentarytextures,whichallowforprotolithidentification.Inother exposures,partitionedhighstrainproducesmylonitic,ultramylonitic,andphylloniticrocksofvariableprotolithaffinity. MetaigneousrocksinbothteranesareclassifiedandnamedusingthenomenclatureoftheInternationalUnionofGeologicalSciences(IU GS)subcommissiononthesystematics ofigneousrocksafterLeMaitre(202).Relictigneoustextures,modalmineralassemblages,ornormalizedmineralassemblageswhenwhole-rockgeochemicaldataare available,providethebasisfornamingmetaigneouslithodemes.ApreliminarylithodemicdesignationisdevelopedherefollowingArticles31-42oftheNorthAmericanStratigraphicCode.Theserockunits,whichlackgeochronologicdataandstratigraphicfacingdirections,warantsuchadesignation.PastmapsandlithologicdescriptionsofFortson(1958),Parker(1979),andFarar(1985a,b)intheCaryQuadrangleassistedthedevelopmentofthecurentmappingresults.Detaileddescriptionsofsomelithodemic unitsarereportedinBlake(194),StoddardandBlake(194),andBlakeetal.(2001). TriassicsedimentaryrocksoftheCaryQuadranglearepartoftheChathamGroupoftheNewarkSupergroup(W eemsandOlsen,1997)andoccurintheeast-centralportionoftheDurhamsub-basin,acomponentbasinoftheDeepRiverMesozoicriftbasin.DetaileddescriptionsofTriassicsedimentaryunitsarereportedinHoffmanandGallager(1989)andClarketal.(2001).Duetotheinterfingeringnatureofthesesedimentsandthelackofdistinctmarkerbeds,lithofaciesmappingwasutilizedtogrouptherocksintomappable units.HoffmanandGallagher(1989)identifieddistinctlithofaciesintheDurhamsub-basin.Theselithofaciesweregroupedinthreelithofaciesassociations,identifiedasLithofaciesAssociationI(LAI),LithofaciesAssociationI(LAI),andLithofaciesAssociationI(LAI).Ingeneral,LAIcontainsinterbeddedsandstoneandsiltstoneandisinterpretedasbraidedstreamdeposits.LAIalsocontainsinterbeddedsandstoneandsiltstone,butisinterpretedasameanderingfluvialsystemsuroundedbyvegetatedfloodplain.LAIcontainspoorlysortedsandstone,pebblysandstone,andconglomerate.LAIisinterpretedasalluvialfancomplexescharacterizedbybroad,shallowchannels withhighsedimentconcentrations,andlocally,high-energydebrisflows.LAIlithologiesarenotpresentinthemaparea. SedimentaryUnit Q al-Q uaternaryaluvium:Tantolightgray,unconsolidated,poorlysortedandstratifieddepositsofangulartosubroundedgravel,sand,silt,andclayinstreamQal drainages.Includespointbars,teraces,andnaturalleveesalonglargercreekfloodplains.Foliationmeasurementsrepresentmesoscalecrystallinebasementinliers suroundedbyalluviumtoosmalltomapseparately. IntrusiveUnit Jd-diabase:Darkgreen-blacktogray-black,plagioclaseandaugiteaphyric,andlocallyplagioclasephyricdiabasethatislocallyolivine-bearing.W eathersJd totan-gray,spheroidallyrounded,densebouldersandcobbles,orpunkycobblesandpebblesthatcanbetracedalongstrikewhereoutcropisnotcontinuous. NewarkSupergroup,ChathamGroup Trcc Trcc-conglomerate:reddish-browntodarkbrown,iregularlybedded,poorlysorted,cobbletoboulderconglomerate.Muscoviteisraretoabsentintheverycoarse-grainedtogravellymatrix.Anarbitrarycut-offofgreaterthan50percentconglomeratedistinguishesthisunitfromtheTrcs/cfacies.Clastsarechieflymiscellaneousfelsicandintermediatemetavolcanicrocks,quartz,epidote,bluish-grayquartzcrystaltuff,muscoviteschist,andraremeta-graniticmaterial.Maximumclastdiametersareinexcessof2malongHaleysBrancheastoftheRDUairport. CrabtreeCreek Lithofacies Lithofacies Pluton CaryMetamorphicSuite Assoc.I Assoc.I Trcs/c-sandstonewithinterbeddedconglomerate:reddish-browntodarkbrown,iregularlybedded,poorlysorted,coarse-grainedtopebbly,muddylithic Trcs/c sandstoneswithinterbeddedpebbletocobbleconglomerate.Muscoviteisraretoabsentinthematrix.W ell-definedconglomeratebedsdistinguishthisunitfrom conglomeratebasallagsofTrcs.Anarbitrarycut-offoflessthan50percentconglomeratedistinguishesthisunitfromtheTrccconglomeratefacies.Conglomeratebedsarechannel-shapedandscourintotheunderlyingsandstonebeds.UnitgradeseastwardintoTrcc. Trcsc-pebblysandstone:reddish-brown,pebbly,poorlysorted,coarse-grained,lithic,feldspathicsandstone;locallycontainslaterallydiscontinuouspebbleandTrcsc cobbletrainsandconglomeraticchannellags. Trcs-interbeddedsandstoneandpebblysandstone:reddish-browntodarkbrown,iregularlybeddedtomassive,poorlytomoderatelysorted,medium-tocoarse- Trcs grained,muddylithicarkoses,withoccasional,matrix-supportedgranulesandpebblesoras1-5cmthickbasallayers.Muscoviteiscommontoabsent.Occasionalbioturbationisusuallysuroundedbygreenish-bluetograyreductionhalos.Bedsaretabular,1-3metersthick,withgoodlateralcontinuity.UnitgradeseastwardintoTrcs/c. Trcsi/s-siltstonewithinterbeddedsandstone:reddish-brown,extensivelybioturbated,muscovite-bearing,siltstoneinterbeddedwithtantobrown,fine-toTrcsi/s medium-grained,muscovite-bearing,arkosicsandstone,usuallylessthanonemeterthick.Siltstonescancontainabundant,bedded,calcareousconcretions(interpretedascaliche)andironnodules.Bioturbationisusuallysuroundedbygreenish-bluetograyreductionhalos. Trcs/si2-sandstonewithinterbeddedsiltstone:cyclicaldepositionalsequencesofwhitish-yellowtograyish-pinktopalered,coarse-toverycoarse-grained, 2 Trcs/si troughcross-beddedlithicarkosethatfinesupwardthroughyellowtoreddish-brown,medium-tofine-grainedsandstone,toreddish-brown,burowedand rootedsiltstone.Bioturbationisusuallysuroundedbygreenish-bluetograyreductionhalos.Coarse-grainedportionscontainabundantmuscovite,andbasal gravellagsconsistofclastsofquartz,bluish-grayquartzcrystaltuff,andmudstonerip-ups. FaultRocks Trsc-silicifiedcataclasite:tan,tan-brown,andwhite,silicifiedcataclasitethatiscommonlyhematitestainedlimoriteordisplayshematite-filledfractures.OtherTrsc fracturesareinfilledwithidiomorphictoxenomorphic,massivemilkyquartz.AngularclastsofTriassicsedimentaryunitsandthehighlysilicifiedandrelictfoliatedcrystallinerocks,especiallytheColesBranchphyllitearecommonalongtheJonesboronormalfaultzone.Someclastsresemblechlorite-whitemica phylliteorphylloniteoftheSycamoreLakegreenstone. EasternmostCarolinaTerrane Metaintrusive CZrg�ReedyCreekmetagranodiorite:Leucocratic(CIlessthan10),lighttan-graywhite,bluish-graywhite,orpinkish-white,medium-grained,andlocally CZrg containingporphyritic2-4mmbluequartzphenocrysts.Boulderfieldsandmassiveoutcropsarexenomorphictosubidiomorphicmetagranodioriteorfoliatedandlineated,protomylonitictomyloniticgranodioriticgneiss.Aggregatesofwhitemica,quartz,plagioclase,andorthoclasehighlighttheminerallineation.Locallycontainssubidiomorphicbiotiteplatesandisolatedclotsofepidoteandbiotite,andiswhitemica-richingneissiclayers.ContainsenclavesofSycamoreLake greenstoneandmicrodiorite,andiscrosscutbyfine-grainedapliticdikes. CZslg�SycamoreLakegreenstonemetadioriteandmeta-microdiorite:Mesocratic(CIgreaterthan50),variablylightgreen,gray-green,anddarkblack- CZslg green,fine-tomedium-grainedrockscontainingchlorite,epidote,albite,whitemica,andminorbiotite.H asacrystalloblasticmatrixthatlocallycontainsrelict porphyriticplagioclaseandporphyroblasticactinoliteingreenstone.Equigranular,finelyphaneritic,sausseritizedplagioclase,andblockyactinolitedefinethe microdiorite.W herefoliated,formswhitemicachloritephyllite,phyllonite,orschist,anddisplayadip-parallellineationofchlorite-white-mica-quartzmineral aggregatesorveinfibers.FormsenclavesintheReedyCreekmetagranodiorite. MetavolcanicandMetasedimentaryUnits CZrs-ReedyCreekLakeschist:Melanocratic(CI=100),darkgreentogreenish-tan,medium-grainedandporphyroblastic,moderatelytowellfoliatedactinoliteCZrs chloritetalcschist.ProtolithmaybepyroxeniteorperidotiteassociatedwiththeSycamoreLakemetadioriteandTurkeyCreekamphibolite. CZtca�TurkeyCreekamphibolite:Melanocratic(CIgreaterthan65),darkgray-greentoblack-green,fine-tomedium-grained,andmoderatelytowellfoliated t CZtcaa andlocallylineated.Plagioclase,hornblende,biotite,chlorite,andepidoteformagranoblastictolepidioblasticmatrixinamphibolite,biotiteamphibolite,andhornblendegneiss.Relictphaneritictexturesandcross-cutingrelationshipsareusedtoidentifyoutcropsofmetagabbroandmetadiorite,whilerelictplagioclase phenocrystsarepreservedinsomefine-grainedamphiboliteinferedtobemetabasalt.Locallycontainsporphyroblastichornblende. CZcbp-ColesBranchphylite:Tan-white-orangetodarksilverygray,fine-grained,well-foliatedandlocallylineatedrock.Mixedmaficandfelsiclithodemic CZcbp compositionallayeringalternateamongwhitemicaphyllitelocallycontainingquartzandplagioclasephenocrysts,mesocraticwhitemica-chlorite-biotitephyllite,andlocallyveryfine-grainedgreenstoneandchloritephyllite.Typically,high-strainmyloniticand/orphylloniticfabricelementoverprint,especiallyadjacenttotheJonesboronormalfault,obscuresprimaryprotolithtexturesandcontactrelationships.TheserocksmaybevolcanicorvolcaniclasticbaseduponstructuralandlithodemicpositionwithrespecttotheBigLake-RavenRockschistlithodeme.Identifiable,lesssilicified,clastsinTriassicsilicifiedcataclasitetypicallyarethisphyllite. CZpbg�PotsBranchgreenstone:Melanocratictomesocratic(CIgreaterthan50),variablylightgreen,gray-greenanddarkblack-green,fine-tomedium-grainedCZpbg rockscontainingchlorite,epidote,albiteandactinolite.Hasacrystalloblasticmatrixthatlocallycontainsrelictporphyriticplagioclaseactinolite. CZbr1-BigLake-RavenRockschist(upper):W hite-graytowhite-tantowhite,fine-tomedium-grained,wellfoliatedandlocallylineated.ResistantoutcropsCZbr1 arecommonlywhitemicaschist,althoughcompositionallayerscontainingbiotiteand/orchloritearepreserved.Locally,outcropscontainclastsincludingwhite Fe tograyphylliteinferedtobemetamorphosedlapillitephraorfine-grainedvolcanicrocks,therebypreservingrelictfragmentalvolcanictextures.Otheroutcrops containamixedassemblageofroundedclastsofmaficandfelsicvolcanicdetritusthatrangeupto20cminlength,reflectingavolcaniclasticprotolithpriorto metamorphism.Fepolygonsindicateareasthatcontainfloatofiron-oxiderock.LocalpatchesofironstonefloatoccurinhilltopssuroundingBigLakeinUmsteadStatePark. CZbr2-BigLake-RavenRockschist(lower):W hite-graytowhite-tantowhite,fine-tomedium-grained,foliatedandlocallylineated.Rockledge-likeoutcrops CZbr2 ofwhitemicaquartziticschistarecommonalongtributariestoSycamore,Crabtree,andSwiftCreeks.Abundantresistant,relictphenocrystsofbluequartz,albitic plagioclase,andsanidineupto3-5mmindiameterarewellpreserved.Localdomainsofwhitemicaphylliteorfine-grainedschistuptoseveralcminlength maybemetamorphosedlapilliclastsorrockfragments.Themode,porphyritictexture,andinferedrelictclastssuggestafelsicdaciticvolcanicorvolcaniclastic protolithforthislithodeme,whichismappedbetweenUmsteadandRavenRockStateParks.SycamoreLakegreenstoneandmicrodioriteformscompositionalinterlayerswiththefelsicschist.LocalfloatcobblesandpebblesofironstoneoccurinhilltopssuroundingBigLakeinUmsteadStatePark. CrabtreeTerrane MetaintrusiveUnit CZccg�CrabtreeCreekgneis:Leucocratic(CI=5-10),greenishsilver-gray,pink-gray,andtan-pink,medium-tocoarse-grained,andwell-foliatedandlineated, CZccg porphyroclasticgraniticorthogneiss.Plagioclase,microcline,whitemica,biotite,andlocaltourmalineformagranoblasticandlepidioblasticmyloniticmatrix suroundingupto1cmoblateandrod-shapedporphyroclasticquartzaggregates.Quartzshapesandwhitemicadefineapenetrative,subhorizontalL>Stectonitefabric.Iregularlyshapedblocksandhorizonsofbiotiteamphiboliteareinferedtobeenclavesortransposedmaficdikes.Thisgneissdominatestheeastern portionoftheCrabtreeCreekplutonintheRaleighW estQuadrangle(seeBlake,194). References: Blake,D.E.,194,W esternFlan Blk koftheRa a Cl T.W .,l e,D.E.,Clark,forthe50thAnnua ark t, eigh,H eller,M.J.,201,Atemporalviewofteranesandstructuresinthe MeetingoftheSoutheasternSection,Depositional eigh,i IntrusiveanddeformationalrelationshipsoftheCrabtreeCreekplutoninwestRalleighMetamorphicBel NorthCarolina,Ral NorthCarolinaGeologica and eastern l nStoddard,E.F.andBlake,D.E.,eds.,GeologyandFieldTripGuide,CarolinaGeologicalSocietyGuidebookfor1994,p.25-37 Survey,NorthCarol Basetopographicmapisdigital rastergraphicimageoftheCary 7.5-minutequadrangle(193),NorthCarolinaStatePlane SCALE1:24000 10.5 0 1 NAD83meterscoordinatesystem. 81/2 151M Miles ThisgeologicmapwasfundedinpartbytheUSGSNationallogicMappingProgramunderStateMap. �1998(StateMapAwardF Farar,S.S.,1985a,Farar,SS1985b,Fortson, dberg,Fie GeologicalSocietyofAmerica,Raleigh,NorthCarolina,p. andstructuraframeworkoftheDeepiverTriassicbasin,eigh, i Gol ,T.W .,Gore,P.J.,andW atson,M.E.,2001, forthe50thAnnualMeetingoftheSoutheasternSection,GeoStratigraphyofthenortheasternNorthCaroTectonicevo easternPiedmont, northwest l ..,C.W lutionofthe l SocietyofAmerica,RalSoutheasternGeo ILS Fielddataplotedonmyl ofCaryquadrangle 23MILS 117' 1,000 500 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 NORTHCAROLINAFee CooperativeGeoGeologymappedbyDavidE.Blake1997GeologymappedbyTimothyW 1998� H l S -, .Clark 2001. Y1997). H J ogyoftheCrabtreeCreePbGeochonologyofvol oftheRal k logicalinaPiedmont:NorthCaro R W esternFlank eigh, oftheeastern Ral l .,1958,Geol .A.1994,UdTripGuide,ibbard,.,Stoddard, thesouthernAppal offman, area, canogenicteranes logicalNorthCarol ina:Geo l ogy,v.25,no.SocietyofAmericaBuina(M.S. p.27159 NorthCarolina, 3, inaPiedmont, 149-180.NorthCaro . nHoffman,C.W .,ed.FieldTripGuidebook -50. l ina,inHoffman,C.W .,ed.FieldTripGuidebook E.F.,Secor,D. achians: ina,Raleigh, one: lt,NorthCarolTheCarolinaZ NorthCarol Thesis):RalinaPiedmont:PreNorthCaro 183 v.96,p.NorthCarol - p.lletin, . C.W .andGallagher,P.E.,1989,Geol34p.R 299-339 eigh,liminaryresulinapp.13-17OverviewofNeoproterozoic t arcopy 10.5 0 1 from1973, UTMGRIDAND2003MAGNETICNORTH photorevised1987.Datadigitized DECLINATIONATCENTEROFSHEET CONTOURINTERVAL10FEET andprojectedonto193quadrangle. Kilometers Disclaimer:ThisOpen-Fi Survey,LeMaitre, eighmetamorphicbe ,Jr.,andDennis,A.,2002,EarthScienceReviews,v.57,n.3/4,p. . ogyoftheSoutheastDurhamandSouthwestDurham7 l 362-380.inaStateU nStoddard, ts,i niversity,101p. E.F.andBlake,D.E.,eds.,Geologyand toear .lyPaleozoicperi-Gondwananteranesalongtheeasternflankof .5-minuteQuadrangles,NorthCarolina,Bulletin92,NorthCarolinaGeological lereportispreliminaryandhasbeenreviewedforlinaGeol lSurveyeditorial onPark MAPLOCATION conformitywiththeNorthCaro ogica standards.FurtherrevisionsorcorectionstothisOpenFilNCGSGeologicMapSeries. er, mayoccurpriortoitsreleaseasa emap Stoddard,Geol .W .,Ed.,2002,IgneousRocks:AClassificationandGlossaryofTerms:RecommendationsoftheInternationalU nionofGeologicalSciences(IUGS)SubcommissionRocks: CambridgeUniversityPress,252p. a theSystematicsofIgneous J.M.,1979,GeologyandmineralEFandBlke,D.E.,eds.,Geo Cambridge, ofW W ..l ogicaeems,R.E. a l CarolinaGeological197, Survey,andOsen,P.E., keCounty:NorthCarolinaGeologicalSurveyBulletin86,122p.,1:100,000-scaldTripGuide,WesternFl oftheRaleighmetamorphicbelt,NorthCarolina,RlSocietyGuideboo for1994,10p.SynthesisandrevisionofgroupswithintheNewar resourceslogyandFie l k ank a emap.eigh,NorthCaro lina Explanationof kSupergroup,easternNorthAmerica,GeologicalSocietyofAmericaBulletin,v.109,n.2,p.195-209. MapSymbols Contacts PlanarFeatures LinearFeatures Lithologiccontacts-Distributionandconcentration Observationsitesarecenteredonthestrikebarorareattheintersectionpointofmultiplesymbols.WEST EAST ofstructuralsymbolsindicatesdegreeofreliability. Planarfeaturesymbolsmaybecombinedwithlinearfeatures. 6 geologiccontact 42 Strikeanddipofinclinedbedding BearingandplungeofmineralelongationlineationofTriassicsedimentaryrocks 0 inferedgeologiccontact 0 9 17 concealedgeologiccontact Strikeanddipofinclinedfoliation(Srs) Bearingandplungeofmineralstretchlineation diabasecontact-solidwherelocationknown, 11 Strikeanddipofverticalfoliation(Srs) Bearingandplungeofcrenulationlineationdashedwhereinfered,dotedwhereconcealed crosssection 26 Strikeanddipofinclined 42 shearfoliation(Src) Bearingandplungeoflineation D fault-Dindicatesdownthrownside,? 31 strikeanddipofaxialsurfaceofF4Uindicatesupthrownside U foldsassociatedwithMesozoicfaulting?indicatesextentuncertain -4000 -4000 britlenormalfault-solidwhereknown, MineralResourcesanddashedwhereinfered OtherFeatures ? ?indicatesextentuncertaincrosssections:Depthinfeetbelowgroundsurface-noverticalexaggeration 1 abandonedbuildingstonequary SCALE1:24000 (SycamoreCreekquary,Parker,1979) WEST EAST CrosSection 2 activecrushedstonequary lithologiccontact Threediscordantfractionsofeuhedral,colorlesstolightpinkzircon 3 0 yield207Pb/206Pbagesof573,574,and579Maandanupperinterceptage0 faultline of575+-12Ma,interpretedasthetimeofcrystallization(Goldberg,1994). CY97-2074 diabase geochemicalsamplelocation ductilenormalfault observationstationlocation SchmidtEqualAreaStereogramData -4000 -4000 WHOLEROCKGEOCHEMICALANALYTICALRESULTS GEOLOGICMAPOFTHECARY7.5-MINUTEQ UADRANGLE,WAKEANDDURHAMCOUNTIES,NORTHCAROLINA OPENFILEREPORT2016-02 Contouredpolestoregional Contouredpolestoregional Contouredmineral,aggregate ContouredpolestobeddingfoliationSrs(n=309) shearfoliationSrc(n=33) andstretchlineations(n=69) inTriassicsediments(n=80) GEOLOGICMAPOFTHECARY7.5-MINUTEQ UADRANGLE,WAKEANDDURHAMCOUNTIES,NORTHCAROLINA BYDAVIDE.BLAKEANDTIMOTHYW.CLARK DigitalrepresentationbyMichaelA.Medina Scanwithsmartphoneforlink2016 toGeoPDFofmap.ThirdpartyApprequired. INDEXTOGEOLOGICMAPPING