N P R O E R L T

EXPLANATION I H M

I C SEDIMENTARY UNITS N

SPRING HOPE TERRANE A A R

Qal - Alluvium: Tan to light gray, unconsolidated, poorly sorted and stratified R O

Qal SEDIMENTARY SEQUENCE Y

deposits of angular to subrounded gravel, sand, silt, and clay in stream drainages. L

B CZss - metasiltstone: Fine-grained, yellowish-gray to greenish-gray metasiltstone. I N Includes point bars, terraces, and natural levees along larger creek floodplains. CZss E A Composed of quartz, plagioclase, muscovite, and chlorite. Accessory minerals D

R Trcc - Conglomerate: reddish-brown to dark brown, irregularly bedded, poorly include titanite, epidote, apatite, and magnetite (?). Lacks well defined bedding planes. G O Trcc E C DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES NORTH CAROLINA GEOLOGICAL SURVEY sorted, cobble to boulder conglomerate. UPPER VOLCANIC SEQUENCE O K L

O

Trcs/c - Sandstone w/interbedded conglomerate: reddish-brown to dark brown, CZsa - argillite: Very fine grained, light-gray to light-olive-gray laminated argillite. G

CZsa G Trcs/c irregularly bedded, poorly sorted, coarse-grained to pebbly, muddy lithic E I DIVISION OF LAND RESOURCES OPEN FILE REPORT 2004-02 s Chlorite +/-muscovite, and +/- graphite (?) layers generally <1mm thick alternate I O C I e I i

L

sandstones with interbedded pebble to cobble conglomerate. A .

c with thicker quartz-rich layers in Middlesex, Stancils Chapel, Selma, and Flowers O c This geologic map was funded in part by the USGS National Cooperative Geologic Mapping Program a L f o quadrangles. Includes muscovite phyllite, slate, and sparse granular quartz-epidote G

o

s Trcsc - pebbly sandstone: reddish-brown, pebbly, poorly sorted, coarse-grained, S h s I t Trcsc U i rock and crystal tuff in the Bunn East quadrangle. Locally phyllitic with thinly laminated C A lithic, feldspathic sandstone; locally contains laterally discontinuous pebble and 78° 00' L R

to massive mudstone in Zebulon. Laminated chlorite phyllite, metaconglomerate, and M 79° 00' cobble trains and conglomeratic channel lags. V A E

Qal c greywackes (?) are locally interbedded with the argillites in the Spring Hope area.

Pcg 36° 00' i

Prg P

Qal Qal Y T CZcwq Trcs - Interbedded sandstone and pebbly sandstone: reddish-brown to dark brown,

Qal s L

CZdi CZflg Qal Qal CZfua

U s Qal CZrl Trcs O 36° 00' Jd Jd Jd PzZrg CZfp O Jd A irregularly bedded to massive, poorly to moderately sorted, medium- to coarse- Trcs/si2 F CZfut CZcfg Pcg Pcg a CZsph CZsph - sericite phyllite:- fine-grained, white to light-gray phyllite or schist; typically i Qal F CZfa CZfu P Trcs CZfu CZcfg Qal Jd CZsmv3 r CZfu Trcs/si1 e CZfut CZrgn grained, muddy lithic sandstones with occassional matrix-supported granules E T k CZslt Qal T with strongly developed crenulation cleavage. Locally includes felsic metavolcanic a CZfus CZfs Prg CZsfv CZsxph . F CZfa Jd CZsdv N Qal Jd L Jd H lls Jd CZrgn e and pebbles and 1-5 cm thick basal gravel layers. t rock and quartz-epidote rock. Unit is interpreted to be product of alteration of CZsfv O Jd

Jd a E F . CZdi F C a

CZsdv O Qal Jd I R Jd Qal L unit. In the Lake Wheeler quadrangle, the unit is a grayish-green muscovite phyllite Trcs/si1 Qal CZcbh Qal CZsmv3 Trcs/si2 - Sandstone w/interbedded siltstone: whitish-yellow to grayish-pink to L Jd M C CZcbh A Jd CZsmv E ? CZfu Trcs/si2 Jd A CZfs s and phyllonite commonly with lesser amounts of chlorite and sparse garnet. I

CZsdv E pale red, coarse- to very coarse-grained, cross-bedded, lithic arkose that fines L I 96 581 e i R Jd H  CZsmv3 Qal  K Qal Prg CZsmv3 . E Qal Trcc ® ® c CZsxph - crystal phyllite: Quartz crystals are conspicuous in the quartz crystal phyllite. Qal R CZfut c F upwards through yellow to reddish-brown, medium- to fine-grained sandstone, E A PzZgg 39 CZsmv3 a 98 I f Jd U  L o G Jd  Qal ® a Qal P s ® Jd W CZfu 98 k o D e to reddish-brown, burrowed and rooted siltstone. CZsphg - muscovite schist and sericite phyllite: Fine grained, white to light gray

Jd O H Â s ® h R Jd Jd t CZsphg Jd O i Jd o A

Jd R Qal y R L Jd CZcfg phyllite or schist. Composed of white mica with minor quartz and garnet. Locally 3 Jd O CZfus CZrgn a Trcsi/s - Siltstone w/interbedded sandstone: reddish-brown, extensively

Qal l T Jd B CZfu Fa Prgm e 0 Jd Trcsc S ll Trcsi/s

Jd 147 s CZchc contains tourmaline and abundant opaque minerals. Contains minor layers of '

 E D CZfs Qal bioturbated, siltstone interbedded with tan to brown, fine- to medium-grained, 2 Jd ® x N Jd U CZfut 0 O chlorite phyllite and mafic volcanic rock east of NC HWY 39. s 6 Jd J CZgb F arkosic sandstone. Locally contains zones of calcareous stringers and nodules. 0 Qal I

Qal e CZsfv 0 4 i CZfut CZfua .

Jd CZfu Lake c ' - Jd CZsxt c Jd CZspha - altered phyllite: - Altered (sericitization, silicifaction, and pyritization alteration) 0 CZfua a Q 501 o Jd Trfb CZcwq F f Trcs/si1 - sandstone with interbedded siltstone: pinkish-gray to light-olive-gray, CZspha 2

Prgm s

R Qal o Trcs/si1 ¤£ CZrgn Prg CZsmv3 phyllite which contains chloritoid and concordant zones of massive quartz in the Stancils U Jd Jd CZqd Qal CZfu Qal s 15 Jd Jd A Qal Prgm CZsdv h fine- to medium-grained, micaceous, feldspathic, crossbedded sandstone; t A Jd A

CZfa i ¤£ Jd Jd W N CZsphg Chapel quadrangle. CZfu L

CZdi D Jd CZcgs Qal PzZgg Jd A K CZsmv3 fine- to very fine-grained biotite is a distinctive accessory mineral; unit includes CZfa CZfua Prg K L CZslt Jd Jd T E I R PzZrg CZfut L CZfq Qal N inter-bedded reddish-brown, bioturbated siltstone and muddy, fine-grained sandstone. CZsfv - fine-grained felsic volcanic rock: Aphanitic, gray, quartzo-feldspathic, volcanic U Jd Prg CZsfv A Trcs/si2 Jd CZfu CZfs C C CZslt CZsfv CZcu A Qal Jd

Jd N F O O rock interpreted to be vitric and vitric crystal tuff. Locally, includes felsic lithic tuff with

. Prg Trcs/si1 > G Trcs D . Qal IGNEOUS UNITS disseminated pyrite west of the Neuse River. Felsic volcanic rocks are commonly altered. Jd > L U M Qal CZfut c Trcc R Qal i Jd Jd Qal Prgm E

Jd O Tp s F Jd - Diabase dikes: steeply dipping to subvertical dikes of gray to bluish-black, CZsdv - dacitic metavolcanics: Distinctive bluish, gray, or white weathering, thinly , I s Jd my CZfu CZsfv Jd Jd N T Qal Qal CZsdv a Jd N CZflg Trcs/c Qal Pwg CZsmv3 r layered and locally strongly fissle fine-grained rocks consisting predominantly of very Qal fine- to medium-grained diabase that may be olivine bearing. Solid lines where O A

Trcsc u H CZfut CZfut Qal R Jd J strongly recrystallized mosaic matix of very fine quartz + plagioclase +/- microcline grains. G observed; dotted lines where inferred from aeromagnetic data. E I Jd T Jd K E Prgm . Qal A L Jd CZgb L CZsmv3 Relict phenocrysts are present. Locally rock is viteous on fresh surface. Rock is H Jd Qal A Qal O Pacg - granite of the Avents Creeks type: Light gray to pinkish gray, fine- to Trcs/si1 CZfa R CZfut Jd C C Jd Pacg distinctively hornfelsic near margin with Rolesville pluton. Chemistry data indicate that Jd CZcfg CZcbh 1 401 CZsdv . medium-grained granite composed mainly of quartz, microcline perthite, and A CZdi CZfut £ Prg N O CZsfv ¤ I Jd Qal £ CZsmv3

CZbr1 ¤ the rocks are dacitic. Interpreted to be pyroclasitic or lava origin. Locally identified

CZrgn L C R 540 F granophyre, with accessory biotite, garnet, magnetite, and muscovite; generally CZfs K I Qal CZchc CZsa H O CZfs ¨¦§ Jd N as "bluestone" due to distinctive bluish color. S A massive, but locally foliated near contacts. The granite is characterized by low L PzZuw CZfut Qal CZsph A CZslt CZsmv CZsg CZgb R I 40 N CZsdv CZsmv N T F color index (percentage of dark-colored minerals, generally less than 2, and CZsqms - Quartz-muscovite schist: medium-grained, white to light-gray, quartz-

L Qal Jd S CZfut CZsqms A ¨¦§ U D L L muscovite schist. Commonly contains pyrite disseminated and locally segregated A ranging fron 1 to 5), and by an abundance of perthitic alkali feldspar. Plagioclase Jd U A CZfut 64 Trcsi/s F

Jd Jd PzZrg F CZrgn Qal PzZgg ¤£

Jd T occurs almost entirely as a component of perthite, so the rock is a hypersolvus into layers parallel to the schistosity. Includes very minor chlorite schist, quartzite, Jd > CZcwq CZfua CZdi L Qal Qal U Jd > 50 and intermediate volcanic rock. Commonly with well-developed small-scale folding. Jd CZsg A CZfut granite. It occurs mainly in a large pluton exposed along Avents Creek in the F Â PzZgg ® Qal Jd Jd CZsfv CZsa Jd E Qal K southeastern part of the quadrangle and extending into the Fuquay-Varina Contains quartz pods and quartz veins. Pods and clusters of kyanite are present CZp L CZcgs Jd E L Jd Trcs/si2 I CZcbh CZcm E CZcfg V Jd Qal quadrangle to the east and the Mamers quadrangle to the south. The age is locally. In places the kyanite is concentrated parallel to cleavage. R Jd CZsg S CZcc1 Qal CZsa C E Qal CZcc1 Qal Qal CZslt CZss E 70 N CZsa uncertain, but it appears to be younger than the granites listed below and L Qal CZsa Jd Jd Trcsc £ O CZqfg CZsqk - Quartz-kyanite Rock: dense, massive, white quartzose rock containing ¤ T CZrgn may be middle to late Paleozoic. CZsqk R CZta CZsph A Qal Qal disseminated kyanite and minor muscovite. Some areas shown as CZsqk on the Trcs B Jd Jd Qal Jd CZss Pcg - Castalia granitoid: fine to medium-grained, generally equigranular, R CZfua Pcg map consist of float boulders. Trcs/si1 Trfb E CZcrc PzZuw P Qal biotite+/-muscovite granitoid. It is represented dominantly by biotite-muscovite Qal CZsg P Jd T

Qal Trcs/c U CZcwq

L CZsg CZsbgn - Biotite gneiss: Predominantly fine-grained, white to pale-pink felsic

F Jd F leucogranite. (314 +/-11 ma date.) U PzZuw T PzZgg Qal P Qal L 97 CZsbgn DURHAM CO. A Jd U Â gneiss with scattered biotite flakes. The felsic gneiss is interpreted as metatuff F ® A Qal Jd Jd F Jd P CZsph CZsph Plbg- Lake Benson Pluton: medium-grained, locally porphyritic biotite granite. . Qal Trcc Trcsi/s CZsph Plbg containing rock fragments parallel to the direction of foliation and cleavage.

O PzZub CZsphg

%

. % K

%

% Qal S

%

% CZcrc May contain white mica, epidote, allanite, and zircon.

%

Jd % # E

%

% M

%

C % CZcfg Metamorphic grade appears to increase to the north. %

% Tp

O E

O %

%

%

% Qal I

%

R % R T

%%

%

Jd %

% % CZflg

C CZcc2 C H %

M %

%

O % Qal %

% F Psg - Sims monzogranite: The Sims pluton is a composite body with two major lithologies. %%

%

B % Prg Qal CZss

%

A % I

%

E % %

% E CZsmv - mafic phyllites and greenstone: The unit consists of interlayered mafic and felsic %

S % %

% CZsmv2

%

% H CZsph L

%

Qal % Psg

H E

%

% Qal CZsxt The Conner granitoid facies of the Sims pluton is coarse-grained, inequigranular, megacrystic,

K %

CZta % CZsmv

S % % D

%%

F

%

N %

%

T % U

%

Jd % CZsdv phyllites and greenstones. Greenstone, occupies approximately 5-10% of unit, occurs as A CZsph

%

CZsg %

O

%

% CZsa

% PzZug % B

A

%

% 231

%

J % CZsph very pale orange to grayish-orange monzogranite with abundant perthitic microcline grains %

CZbr1 %

T %

W % Â %

Qal % %

Jd %

% H % ® %

% F U concordant and discordant bodies reportedly reaching up to 1.5 meters in thickness

%

Qal %

%

PzZuw %

%%

% % N

%

Jd % CZsmv up to 5 cm across. The groundmass is plagioclase and biotite with local alteration to C %

% c %%

%

Qal %

i %

% Prg

%

% CZsph (Quartz + epidote greenstone is marker for unit) (Stetler, 1997). Units in Kenly East,

%

% Prg CZslt % % CZsa

%

Trcs % o

%

% Jd Jd

% % muscovite, chlorite, epidote, and rutile. The Sims facies of the Sims pluton is coarse-grained,

%

% Qal

%%

z %%

%

CZsg % % % Lucama, and Bailey quadrangles are covered with Coastal Plain sediments and their

%

Jd % % % CZsmv2 Qal Lake # o equigranular, biotite monzogranite in which the alkali feldspars are smaller is size than in the

PzZrs S e M l distribution is based on geophysical data and sparse outcrop locations. Crabtree CZcwq 440 Y Trcs/si2 PzZuw N Jd CZsg a megacrystic Conner granitoid facies. Accessory minerals are apatite, monazite, thorite (?), # ¨¦§ F O CZcbh CZrgn Jd P CZsmv1 - Meta-andesite: meta-andesite is interbedded and includes common alteration Jd Jd R and zircon. The Sims granitoid facies has a Rb/Sr whole-rock age of 288+/-13 Ma CZcc1 CZcbh M CZsmv1 Jd e PzZuw N t minerals of chlorite, epidote, and quartz. Jd UTB CZchc (Wedemeyer, 1981). An area of greisen is present in the southwest portion of the Sims Jd US F a Jd CZsg H CR EE Qal L Jordan Trfb K FA CZsph pluton. The greisen constists primarily of muscovite and quartz rock with muscovite: CZsmv2 - Meta-basalt: interbedded unit consists of meta-basalt. ULT CZsmv2 Lake Trcs/si2 ZO CZsmv2 Trcs PzZrg PzZug NE quartz ratios ranging from 90:10 to 10:90. Jd Trfb Qal Qal PzZub CZqfg CZsmv1 Prg - Rolesville granitoid:- medium-to coarse-grained to megacrystic monzogranite, CZsmv3 - mafic metavolcanics: Bodies of mafic metavolcanics consisting of fine Jd CZsmv3 Trfb CZsmv2 CZsph Prg granite, and granodiorite. Pegmatites are common near the border of the granitoid to medium-grained, dense rocks consisting of hornblende (or actinolite), epidote Qal Trcc CZsg CZsph CZsph CZsmv4 Jd Jd PzZuw CZcwq 264 and in the quartzofeldspathic gneiss. The Rolesville batholith is a composite pluton (or clinozoisite), plagioclase, and quartz. The rock is strongly recrystallized in the Jd CZta ¤£ CZsph 54 Qal CZsph Jd ®Â Qal with approximately sixteen texturally and mineralogically distinct granitoid facies northwest portion of the Bunn East quadangle. Whole rock chemistry indicates a high Qal Trcs/si2 Qal Jd BUS CZcrc recognized (Speer, 1994). One distinct facies of the Rolesville batholith is the Archers Fe/Mg ratio for the rock compared to most basalts. PzZub 64 264 Jd Qal CZcgs CZcfg CZcbh ¤£ ¤£ CZsa Lodge megacrystic granitoid. The Archers Loge is a coarse-grained biotite monzogranite CZmv4 - Mafic tuff and intrusive rock: Medium -to coarse grained, medium-to dark green CZsg CZcfg P Qal Trcs/c Qal CZslt with K-feldspar megacrysts up to 3 cm long. Other facies within the Raleigh 100k sheet CZsmv4

55 Qal mafic tuff (possibly basalt), mafic lithic tuff and mafic intrusive rock. The body south of

Jd ®Â F Jd D Qal CZsxt I include the Averette, Bunn, Lassiter, Marks, Mitchell, and Rolesville Main. The Rolesville 75Â1 U CZchc NC Hwy 96 contains quartz tourmaline rock. ® Trfb CZsg CZcwq CZspha Main facies has a U/Pb date of 297.6 +/- 3.2 Ma (Schneider and Samson, 2001). The CZcwq Jd CZsphg CZmv5 - Mafic metavolcanic: chlorite +/- muscovite phyllite, grenstone, and sparse Qal CZta Prg batholith is interpreted to have been constructed by a single pulse of magmatism at CZsmv5 Qal CZss epidote-rich quartzofeldspathic rocks. Phyllite is the dominant lithology. Located in CZp ? CZcc1 ca. 298 Ma (Schneider and Samson, 2001). Qal Lake Wheeler area. CZcbh Psg Qal Trfb Prgm - Rolesville granitoid marginal phase: muscovite rich granitoid dominated by CZbr2 CZcwq Jd CZsu - Metavolcanic rocks and phyllite undivided: included chlorite phyllite, muscovite CZbr1 BYP CZsa Prgm Jd Jd aplite, pegmatite, leucogranite, and quartz-muscovite greisen. Pegmatite dikes 1" to 3" CZssu Jd O. phyllite, greenstone, and quartz-feldspar-white mica phyllite.

CF Zcbh 64 C PzZrg £ Jd H O. thick are common in granite in the Prgm. ¤ AS C Psg CZcc1 La Jd N N LOWER VOLCANIC SEQUENCE Trcs Trfb ke n O so Jd Qal LS Prgl - lineated Rolesville granitoid: fine to medium-grained, light-gray to light pink, Jd hn Qal CZsph I Jd Jo CZcwq Psg W Qal Prgl CZslt - Laminated epiclastic rocks and felsic lithic-crystal tuff: Medium- to coarse-grained, Jd Qal Qal lineated muscovite-biotite-quartz-feldspar granite. Locally contains garnet. Biotite Jd D D CZcfg Qal CZslt U CZsg steaks form the lineation. Some layers are coarser grained. Cut by numerous light-gray laminated rock. Consists of flattened pumice lapilli, quartz crystals, and layers Trcc U F Qal e Qal 440 Qal of sediment in a matrix of quartz, feldspar, and mica. Locally phyllitic. Felsic epiclastic Lak pegmatites and aplite stringers. an 40 P Jord ¨¦§ CZflg CZsph metasandstone and fine grained sandstone interlayed with crystal and crystal-lithic tuff ¨¦§CZcbh Qal Qal Qal CZcgs Pwg - Muscovite-biotite granite of Wyatt pluton (Pennsylvanian): Very light gray, Qal Many of the crystals are well rounded suggesting reworking. CZcrc Qal CZqfg CZsph Pwg 64 CZcgs CZsxph Psg medium-grained, muscovite-biotite monzogranite and pinkish-gray, medium- to ¤£ CZsg CZcrc CZsph CZsxt - Crystal tuff: Fine- to medium-grained, light-gray felsic volcanic rock containing Qal coarse-grained, muscovite-biotite monzogranite. Presence of muscovite (less CCZZssxut CZcwq Qal phenocrysts of quartz and/or feldspar, locally up to 0.5 cm in size. Contains beds of CZsa CZsmv abundant than biotite) and accessory garnet are distinctive. Granite is foliated,

Jd c CZcbh i and inclusions of Raleigh gneiss are common. mafic rock in the Middlesex quadrangle. Qal M CZsmv o Trcs/si2 CZcfg R z

O Trcs/c F o F Jd CZsmv FALLS LAKE TERRANE I PzZglg - Glen Laurel granitoid, PzZpg - Pythian granitoid, PzZg - granitoid, CZsxph e PzZglg CZcfg T Jd Qal CZcwq l N Qal CZsa a A CZcrc PzZphg - Powhatan granitoid: Medium to coarse-grained, light-gray to pale-pink, CZcc1 CZrgn . Jd Qal Psg Qal PzZpg METASEDIMENTARY UNIT Qal Prg Jd P

O . H Prg Qal Trcc C O Qal CZsa - massive to slightly foliated granitoid composed of quartz, plagioclase, k-feldspar, G C PzZg I E CZfs - Falls Lake schist: variably gray colored, mesocratic, medium- to coarse-

K Prg c E N CZbr1 A i muscovite, biotite, epidote, chlorite, and garnet. Locally, contains clusters of CZfs L O

W T o CZsg A S CZsa PzZphg grained, biotite-white mica-oligoclase-quartz schist locally having garnet, staurolite, Jd R N CZsmv z biotite and muscovite.

H CZss Buckhorn o 70 CZss kyanite, and chlorite porphyroblasts. Pods of talc schist exposed locally. CZbr2 O r Jordan Lake Qal CZflg Qal J CZsph ¤£ e CZcc1 Trcs/si2 Qal CZcrc Qal CZsph 222 t PzZlg - Lucama granitoid: Biotite granite. ®Â CZsph o PzZlg CZfu - ultramafic rocks (undivided): Variably altered ultramafic rocks including Jd CZsmv CZsa r Jd CZsmv1 CZfu CZcfg CZcfg CZsa P metapyroxenite, actinolite-chlorite schist, and talc schist.

M Reservoir 401 CZsmv e

CZcrc t L CZcbh £ Qal ¤ 1 a CZsmv CZfut - talc schist: White to gray talc-tremolite schist, talc-chlorite schist, and soapstone. F k a E e P L L CZfut T Jd METAMORPHIC UNITS Rhombohedral cavities suggest former presence of a carbonate mineral (ankerite?). O Qal Jd Prgl CZsxph Qal

N F Wh V eele IL r CZsa

L CZsph CZsxt CZsa CAROLINA TERRANE CZfus - serpentinite: Pale greenish-gray, fine-grained, and massive to moderately-foliated; E CZsa CZp I 1 CZcfg CZspha CZss CZfus ¤£ Prg CZsfv META-IGNEOUS UNITS contains fibrous tremolite, clots of magnetite, and minor amounts of talc and dark green, Qal CZcc1 42 Qal CZbr1 ® unfoliated, chlorite actinolite rock. M S Jd PzZrg - Reedy Creek metagranodiorite: leucocratic (CI<10) light tannish-gray, Trcs/si2 YN Qal Qal CZqfg C CZqfg PzZrg Trcs L CZsg IN medium-grained to porphyritic, foliated and lineated to massive, metagranodiorite. CZfua - actinolite rock and actinolite-chlorite schist: Dark green, schistose to almost E CZcfg Jd F M CZfua R e Locally white mica rich and/or contains blue quartz phenocrysts and clots of gmbs CZspha t massive, splintery rock composed of actinolite and varied amounts of chlorite; minor H CZcfg Plbg am O i O F CZss L CZsu CZsph u L CZsg Qal CZqfg CZsph N biotite and epidote. amounts of talc and magnetite octrahedra are common. Y Lake Jd Y S Zbmfg CZsa S Jd CZsph 95 F CZsl CZsph Benson CZsph CZss e

Qal D v PzZuw - White mica granitic gneiss: leucocratic (CI<5) white to tan, medium- Qal Qal § i CZfa - amphibolite: Dark gray to black, fine- to coarse-grained, well-foliated dikes L ¨¦ SPRIN Qal

G s S E CZsmv PzZuw CZbr2 Jd Jd I CZfa Jd Jd CZsfv F u to coarse-grained, moderately to well foliated, white mica metagranite to F r generally parallel to foliation within country rock. H

CZsph t Trcs/c A ph T Trcc Jd I N n white mica granitic gneiss. T M i am S - Jd IC CZbr1 Qal

a CZfp - pebbly paragneiss and schist (Cambrian and (or) Late Proterozoic?): Biotite- L CZsl CZsg CZrbg Jd t IN CZsa PzZug - Biotite metagranite: Leucocratic (CI<10) pink to tan, medium-grained, CZfp Zbmfg e Jd U E Qal muscovite-oligoclase-quartz paragneiss and schist containing rounded granitoid pebbles. Jd M T Qal Jd CZspha PzZug Qal C L CZss M S R E Rg weakly to moderately foliated locally porphyritic biotite and quartz metagranite. Y E Y CZsg N E Jd PzZng CZsph CZsph d Pebbles are matrix supported and typically sparse. Interpreted as metamorphosed

C K Trfb a L CZbr3 CZsg Jd

I e N c pebbly mudstone or graywacke. t PzZub - Biotite granitic gneiss: mesocratic (CI<35) gray, medium- to fine-grained, Jd E M CZss i Qal s PzZub Jd Qal Jd o well foliated, biotite granitic gneiss. m CZsph z CZspha CZsph CZfq - siliceous rock (Cambrian and (or) Late Proterozoic?): Mainly chalcedony with o PzZglg U CZfq PzZg CZsph e

CZsl l Jd PzZrg CZsmv5 Jd CZqfg CZsxt CZslt CZss PzZrs - Reedy Lake schist: dark green, coarse-grained, moderately to well foliated, drusy quartz crystals; occurs in serpentinite at crest of Adam Mountain. Trcs CZrgn Jd CZsmv1 a PzZrs ARRIS FAULT CZsg PzZpg CZsph CZspha H Trcs P chlorite + actinolite + talc schist. am CZsmv1 Jd Qal - CZfqz - quartzite (Cambrian and (or) Late Proterozoic?): White, granular, and well foliated. T CZfqz Jd L CZrgn Jd Jd CZss CZsa CZcrc Prg c U CZcc1 CZss i PzZgc - Chalk Level metagranite: Light gray to pinkish white, fine- to medium-grained A Jd o F S B PzZgc P F Trcs Qal Qal CZqfg z 8 AULT CZsph Jd CZsa biotite. It generally has a distinct foliation and a color index of 5 to 8. Biotite is the CRABTREE TERRANE

Qal o W Jd Qal Jd CZss Trcs/c CZsfv CZsa r

W82 FAULT mbs Qal Qal e main accessory mineral. The granite forms small plutons west of Chalk Level Church META-IGNEOUS UNITS D CZcbh Qal Jd Qal Qal t Trcsi/s U CZsa CZsph

Jd o T CZra on the eastern side of the Cape Fear River valley and the lower valley of Parkers Creek. L r U mbs CZsph CZcc1- Crabtree Creek gneiss: leucocratic (CI=5-10) greenish-gray to pink, A CZbr1 CZsa Jd F CZbr3 Jd CZsmv P CZccg1q ir CZqfg rvo O PzZbg1 - Burt Creek metagranite: Mixed facies of dark gray to bluish-gray, fine- to medium- medium- to coarse-grained, well foliated and lineated, porphyroclastic granitic ese R qms CZsph e R O CZgn am CZspha t PzZbg1 B CZss Trcc S Qal Qal CZss a grained, weakly to moderately foliated, mesocratic (CI>25) garnet-bearing biotite metagranite orthogneiss facies containing elliptical to rod-shaped quartz crystals, and white mica. E CZbr3 CZbr2 PzZphg Jd Qal Qal N CZra L is Jd O CZbr3 mbs CZsa Qal rr J CZrgn CZsa CZss and light pinkish-tan, fine- to medium-grained, weakly to moderately foliated, leucocratic (CI<5) a CZsa W H Jd Jd ILS CZcc2 - Crabtree Creek gneiss: leucocratic (CI=0-5) gray-white to white-pink, Trcs CZrgn ON magnitite-biotite metagranite. CZcc2 Jd CZqfg JOH CO medium-grained, well foliated and lineated, granitic orthogneiss facies containing Trfb CZrgn Jd Jd CZsa NS . Jd CZsmv1 CZsa CZsa T Qal PzZbg1 Jd O PzZbg2 - Duncan metagranite: Light pinkish-gray, medium-grained, nonfoliated to weakly mica and feldspar porphyroclasts and elongate quartz aggregates. n Prg Jd 96 39 N C o  PzZbg2 r ®Â ® CZsa O. a Qal Jd foliated, leucocratic (CI<10) garnet- and epidote-bearing biotite metagranite. e Jd CZsfv CZss Qal h METAVOLCANIC AND METASEDIMENTARY UNITS S am CZsph PzZgp - Parkers Creek metagranite: Dark gray, generally fine grained, foliated to massive, CZsg Qal . CZsa P CZcrc - Richland Creek schist: mixed unit of silver-gray, fine- to medium-grained, CZbg WA CZrgn CZqfg CZsa O PzZgp garnet-biotite metagranite. It is characterized in hand specimen by abundant biotite and CZcrc K Qal Jd C E Jd Qal well foliated, pelitic garnet + staurolite + tourmaline + white mica + biotite phyllite Trcs/c CZbl C Prg O. CZqfg CZsa E conspicuous small garnet crystals, which give it a darker appearance than other nearby granites. Jd N schist and tan to white, fine-grained, moderately foliated felsic gneiss. PzZbg2 Jd PzZg 581 Qal Y  The color index is generally 15 to 20. The main minerals are plagioclase, perthitic microcline, CZbg A ® Contains layers of CZcgs. CZbm CZcrc am Jd Trcc CZbm CZrgn W quartz, biotite, garnet, and epidote, with small amounts of opaque minerals, muscovite, and Jd Jd 70 CZsa Qal Qal Jd CZsqk ¤£ Qal CZsph mzd CZbg CZqfg CZsbgn CZcfg - Felsic gneiss: pinkish-gray to tan-white, fine- to medium-grained poorly to CZu CZss CZss CZsa sphene. The pluton crops out on both sides of Parkers Creek in its middle reaches. CZccffg CZbg Jd CZsqk CZss CZbm mzd Qal Prg CZqfg Jd CZsqms 222 well foliated, weakly banded microcline-plagioclase-quartz-white mica gneiss and D CZbg Qal CZsqms Qal ®Â PzZgr - Reedy Creek metagranodiorite: Light tannish-gray, medium-grained to porphyritic, U Qal Jd CZsbgn Qal PzZgr leucogneiss, locally with magnetite. CZbr1 foliated and lineated to massive, leucocratic (CI<10) metagranodiorite. Locally white mica 42 CZsph CZsa mzd ®Â CZsph am 301 rich and/or contains blue quartz phenocrysts and clots of biotite + epidote. CZcwq - White mica-rich and quartz-rich schist: gold-gray to silver-gray, very fine- to CZbg . Pacg CZsqk CZsa ¤£ CZss O CZbr3 CZsph CZra CZss CZss CZcwq C CZsa fine-grained, moderately well foliated quartz-biotite and/or chlorite-white mica schist CZmv Qal CZsa T CZss CZss CZbl - metamorphosed leucogranite of the Buckhorn Dam intrusive suite: Light-colored, mzd T CZbl containing sparse to abundant garnet interlayered with silver-white, fine- to medium E CZhb Jd medium- to coarse-grained rocks with poorly developed foliation; composed mainly of CZbr3 CZrgn Jd CZmv PzZgc N CZhb grained, moderately foliated white mica-plagioclase-quartz schist. R CZmv CZra plagioclase, quartz, and microcline, with minor amounts of chlorite, sericite, epidote, A 40 Prg am CZsa Qal . H CZqfg

O CZsa ¨¦§ Jd Jd biotite, and opaque minerals. The color index is usually less than 5. CZcbh - Biotite +/- hornblende gneiss and schist: white-gray to black-gray, very fine- to CZbr1 CZcrc SYNFORM CZss CZss

C Pacg CZsph CZss CZccbh M PzZgp CZss fine-grained, moderately well foliated, unlayered to moderately layered, biotite +/- Z CZsl - Sunset Lake Pluton: A distinctive porphyritic rock, containing abundant euhedral A CZsa CZbr 401 CZss Qal CZsl hornblende-bearing white mica-quartz-microcline-plagioclase gneiss and schist. CZu H CZhb £ Qal phenochrysts of sodic plagioclase, beige where fresh, and sparse roundish quartz T ¤ D CZsa Qal A CZsph EL CZsa Interlayered with lesser green-black, fine-grained moderately foliated plagioclase-chlorite- CZss FI phenocrysts in a groundmass of a vermicular intergrowth of feldspar and quartz. Very H Jd Qal Jd TH BUS C W MI CZss AKE S CZss CZsmv leucocratic (CI < 5) with traces of chlorite, epidote, garnet, titanite, zircon, and opaques. biotite schist and tan, fine-grained, weakly foliated epidote-hornblende-plagioclase rock. CZbg HAR CO 70 CZbr3 Qal NE . 50 ¤£ CZsph Qal PzZgc Jd TT ® Qal CZbg - metamorphosed granitoid rocks of the Buckhorn Dam intrusive suite: Metatonalite, CZcm - ilmenite-magnetite quartzite (Cambrian and (or) Late Proterozoic?): CZha CZbr1 CO CZbr3 . Qal CZbg CCZZccgms CZsa metagranodiorite, and metagranite: Dark-colored, medium- to fine-grained rocks with Occurs near U.S. Highway 70 entrance to Umstead State Park. Qal 210 CZss CZsa ®Â variably developed foliation; composed mainly of plagioclase, quartz, epidote, microcline, CZchc - Horse Creek schist: Silvery gray, coarse-grained, well foliated, lineated and . CZbr3 CZcrc Qal CZsph O Jd Qal Qal biotite, and opaque minerals, with minor amounts of sericite, sphene, chlorite, and garnet. CZcghkc C Qal layered, white mica + biotite schist containing conspicuous porphyroblasts of garnet,

Qal Qal Qal Qal n E CZss The color index is generally high, ranging from 15 to 30. The more felsic granitoid rocks CZsa a E CZss i kyanite, and minor staurolites. L mzd Pacg CZbr3 CZss r are mineralogically and chemically similar to the felsic metavolcanic rocks described below, CZha 35 ° 30' b and are probably the intrusive equivalents. The unit includes a number of small granitoid CZcgk m CZcgs, CZcgs - Muscovite schist: fine-grained white mica phyllite and schist containing

35° 30' a bodies, probably originally dikes and plugs, intruding felsic metavolcanic rocks northeast CZcgs garnet porphyroblasts. Locally includes fine-grained, slaty graphite schist with garnet 78° 00' C

- 79° 00' of the main outcrops of Buckhorn Dam intrusive suite. porphyroblasts - CZcgs. c i

o CZbm - metamorphosed mafic rocks: Metagabbro and metadiorite: Dark green, coarse-

z CZbm RALEIGH TERRANE

o to fine-grained, variably foliated rocks composed mainly of epidote, chlorite, hornblende r e

t (and/or actinolite), plagioclase, opaque minerals and minor quartz. CZrgn - Raleigh gneiss: pinkish-gray to tan-gray, medium-grained, weakly to moderately CZrgn

o CZrgn r CZqd - quartz metadiorite: metamorphosed quartz diorite. foliated biotite-bearing granitic orthogneiss; black-gray to tan-gray, medium-grained, P CZqd moderately foliated, variably layered biotite +/- hornblende-bearing quartz-plagioclase

PRELIMINARY BEDROCK GEOLOGIC MAP OF THE RALEIGH 30' x 60' QUADRANGLE, NORTH CAROLINA e t

a gneiss and schist; and lesser gray-black, fine-grained amphibolite and gold-brown, L CZdi - metadiorite (Cambian and (or) Late Proterozoic?): Metamorphosed biotite- and medium-grained biotite schist. CZdi hornblende-biotite diorite to quartz diorite. CZflg - Falls leucogneiss: leucocratic (CI<5) pink-gray to orange-tan, medium-grained, CZgb - metagabbro: metamorphosed hornblende gabbro. CZflg COMPILED BY T.W. CLARK, D.E. BLAKE, E.F. STODDARD, P. A. CARPENTER, III, AND R. H. CARPENTER CZgb weakly to moderately foliated and strongly lineated, biotite magnetite granitic gneiss. CZra - amphibolite: Black to greenish-black, slightly foliated to lineated and locally CZcu - ultramafic rocks (undivided): Variably altered ultramafic rocks including CZra CZcu schistose hornblende amphibolite. Contains minor interlayered felsic gneiss, biotite metapyroxenite, actinolite-chlorite schist, and talc schist. gneiss, muscovite schist, and biotite schist. Locally contains chlorite and/or biotite. METAVOLCANIC AND METASEDIMENTARY UNITS CZrl - fine-grained leucocratic gneiss: very light gray, fine-grained, leucocratic epidote- Digital representation by Michael A. Medina CZrl plagioclase-quartz gneiss, locally containing darker, hronblende-bearing interlayers. CZic - undifferentiated crystalline rocks of the Carolina Slate Belt: metamorphosed CZic Composition suggests volcanic origin. volcanic, volcaniclastic, and intrusive rocks. CZp - Coles Branch phyllite: tan to dark silvery gray, fine-grained, well foliated, CZrbg - Biotite granitic orthogneiss: medium-grained, weakly banded, weakly CZp CZrbg leucocratic white mica phyllite locally containing quartz and plagioclase porphyritic well foliated granitic gneiss. Phenocrysts are alkali feldspar; 2004 phenocrysts or compositional layering including mesocratic white also contains white mica, epidote, and titanite. mica-chlorite-biotite phyllite and greenstone. PzZgg - gneissic biotite granitoid (Paleozoic?): Foliated biotite granitoid and granitoid PzZgg CZbr - Felsic metavolcanic rocks: Mainly white to light gray, fine-grained orthogneiss interlayered with Raleigh gneiss. Includes Wake Forest pluton and Index to 7.5-minute quadrangles CZbr metavolcanic rocks, with rhyolitic or dacitic composition; generally with well- Greshams Lake pluton. developed schistosity; composed mainly of quartz, plagioclase, microcline, PzZng - Nottingham granitoid orthogneiss: Streaky to weakly banded, generally PzZng T E muscovite, and biotite, commonly with small amounts of garnet. The unit also S E T T P moderately well foliated, locally porphyritic, tan, light brown, or brownish-orange M M L A A F E L S S O H H A R I E A H includes some darker colored rocks of intermediate to mafic composition that O V E biotite granitic orthogneiss. Contains local biotite-rich enclaves which may be R R E S W G 2.5 1.25 0 2.5 5 U U L F N N N Y E N I are metamorphosed to mica phyllite. D D A E L N R xenoliths; epidote, titanite, and white mica are interpreted as products of E B K O U U W A B B P Miles . S R S W S CZbr1 - Big Lake-Raven Rock schist 1: light tan to white, fine- to medium-grained metamorphic and/or low-temperature alteration. CZbr1 white mica quartzitic schist containing abundant relict phenocrysts of blue quartz ROCKS OF UNCERTAIN AFFINITY and plagioclase or local white to gray lapilli and rock clasts. T T 10,000 5,000 0 10,000 20,000 Disclaimer: L S S E CZqfg - quartzofeldspathic gneiss and schist: Fine- to coarse-grained, white to light E E L X V A A N E E W E O S Y Feet CZbr2 - Big Lake-Raven Rock schist 2: light tan to white, fine- to medium-grained, CZqfg L Y D L E E This Open-File report is preliminary and has not been reviewed gray, well foliated, quartzofeldspathic gneiss. Contains interlayers of light-gray to R H H T L L CZbrr22 N G G H U I E A I I B D A well foliated white mica schist containing fragmental textures including white to gray C E E IG E ID B pale-pink felsic gneiss, white to gray, fine-grained muscovite schist, quartz-muscovite E L L N Z for conformity with the North Carolina Geological Survey editorial R A A M lapilli tephra and rock clasts. G R K schist, biotite schist, and greenish-black to black amphibolite. In the Powhatan, R 2,500 1,250 0 2,500 5,000 standards or with the North American Stratigraphic Code. Further CZbr3 - Big Lake-Raven Rock schist 3: Light tan to orange-brown, fine- to Clayton, and Flowers quadrangles, local layers contain abundant plagioclase Meters CZbr3 L revisions or corrections to this preliminary map may occur prior to medium-grained, white mica schist to gneiss. n crystals and sparse white lithic fragments elongate parallel to foliation. R E P EXPLANATION a E A i L S its release as a North Carolina Geological Survey map. r L E R N H A CZfv - felsic metavolcanic rock and phyllitic metasiltstone (Cambrian and (or) Late CZgn - felsic gneiss - Pinkish-gray to tan-white, fine- to medium-grained poorly to well L R C b I X E E O E M CZfv CZgn H E H N T S A Proterozoic?): Generally fine-grained, almost massive to phyllitic, mainly dacitic W 2 1 0 2 4 m P W R Y IL C foliated, weakly banded microcline-plagioclase-quartz-white mica gneiss and leucogneiss, W A A O U CONTACTS E A E L L C L a N K G C F N metavolcanic rock, and fine-grained phyllitic metasiltstone composed mostly of A A Kilometers C locally with magnetite. L T

S -

geologic contact quartz, muscovite, and plagioclase.

c Zbmfg - Mill Creek gneiss: fine- to medium-grained, light olive gray-to gray, schistose i Zbmfg o CZsg - Sycamore Lake greenstone: variably light green to dark black-green to

concealed geologic contact z CZsg rock containing abundant plagioclase crystals and quartz. The unit is more predominantly A N N T T scale - 100,000 o gray-green, fine- to medium-grained, unfoliated to well foliated, epidote actinolite Y I N S S r biotite-muscovite-felsic gneiss. Crystals are particularly prominent on weathered surfaces. R R O E %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% U A R S A A A e T E gradational geologic contact t chlorite greenstone and chlorite + biotite + actinolite phyllite. B -V IE D A M W Lambert Conformal Conic projection Contains pyrite, locally. Includes discontinuous, narrow elongated, and pod-like lenses of

Y o S Y G N H L Y L L r E A N O W E N K U A M S N 1983 North Carolina CZta - Turkey Creek amphibolite: dark black-green, fine- to medium-grained, E P O D O E diabase dike contact very fine-grained, very finely striped felsic rock enveloped in a biotite-rich schist. Gneiss Q P K CZta C U E K CZta

F State Plane coordinate system e moderately to well-foliated and locally lineated, amphibolite, biotite amphibolite, Research supported by the U.S. Geological Survey, National Cooperative t from Mill Creek area in the Flowers quad has been given an U/Pb age of 620 +/- 9 Ma. inferred diabase dike contact a and locally hornblende gneiss and metagabbro. Relict plagioclase phenocrysts L mbs - muscovite biotite schist: fine grained, gray muscovite-biotite schist commonly Geologic Mapping Program. The views and conclusions contained in this are preserved in fine-grained amphibolite. concealed diabase dike contact mbs with white, wispy but locally heterolithic lapilli. document are those of the authors and should not be interpreted as necessarily CZha - hydrothermally altered rocks and mineralized zones, regionally metamorphosed: gmbs - garnet-muscovite-biotite schist: medium-grained, gray to black muscovite-biotite CZha Quartz granofels, epidosite, muscovite-quartz schist, biotite schist, and iron ore. The 75 representing the official policies, either expressed or implied, of the U.S. Government. gmbs Index to geologic mapping 82 81 80 77 76 schist containing small scattered pink garnets and , locally, staurolite. Contains minor 79 78 FAULTS rocks contain various combinations of quartz, muscovite, epidote, garnet, biotite, iron interbedded felsic gneiss, biotite gneiss, and amphibolite. Carpenter, P.A., SOUTH VIRGINIA D oxides, and manganese oxides. The rocks are fine- to medium-grained, and schistose Hoffman and Hoffman and WYTHEVILLE GALAX EMPORIA NORFOLK BEACH Horton and Horton and Carpenter, R.H., DANVILLE BOSTON ? Gallagher Gallagher Stoddard 83 to massive. This unit includes the Buckhorn-type iron ore deposits. Judging from qms - quartz-muscovite schist: medium-grained, white to light-gray, quartz-muscovite others others Speer, J.A. Speer, J.A. and Clark, T.W. U qms 1989 1989 and Clark 1992 1992 (unpublished) (unpublished) boulders at the Buckhorn iron mine, the main seams of iron ore were as much as schist. Commonly contains pyrite disseminated and locally segregated into layers NCGS Bulletin 92 NCGS Bulletin 92 CURRITUCK USGS OF 92-269 USGS OF 92-269 1992 JOHNSON WINSTON- ROANOKE ELIZABETH Stetler BOONE GREENSBORO HENDERSON 2 meters thick. Protoliths of the altered rocks are probably felsic metavolcanic rocks parallel to the schistosity. Includes very minor chlorite schist, quartzite, and intermediate NCGS OF 89-2 NCGS OF 89-1 84 CITY SALEM RAPIDS CITY SOUND Faults - D indicates downthrown block, U indicates upthrown block. 1997 36 36 ? indicates extent uncertain. and granite. The age of alteration and mineralization is uncertain, but the rocks are volcanic rock. Commonly with well-developed small-scale folding. Contains quartz pods regionally metamorphosed and appear to be associated with the Avents Creek granitic and quartz veins. Pods and clusters of kyanite are present locally. In places the kyanite KNOXVILLE ASHEVILLE CHAPEL ROCKY MANTEO Arrows indicate strike-slip movement direction. HICKORY SALISBURY RALEIGH PLYMOUTH Speer, Carpenter, P.A., Carpenter, P.A., HILL MOUNT intrusion or one of the older granites. is concentrated parallel to cleavage. Carpenter, P.A., Carpenter, P.A., Carpenter, R.H., Carpenter, R.H., Watson Blake and and CZhb - meta-hornblendite and hornblende metagabbro: Greenish-black, medium- to Blake Carpenter, R.H., Speer, J.A. Speer, and Speer, and ph - sericite phyllite: fine-grained, white to light-gray phyllite or schist; typically with 1998 Clark Carpenter, R.H. CLEVELAND FONTANA CAPE FOLDS CZhb NCGS GMS 15 1998 (unpublished) Stoddard Stoddard HENDERSONVILLE coarse-grained, massive rocks composed mostly of hornblende, with lesser amounts ph NCGS OF 98-3 NCGS GMS 16 LAKE GASTONIA CHARLOTTE SOUTHERN FAYETTEVILLE KINSTON BAYBORO HATTERAS strongly developed crenulation cleavage. Locally includes felsic metavolcanic rock NCGS OF 98-6 1996 1996 35 PINES of plagioclase, epidote, biotite, quartz, and opaque minerals. The rocks occur in four NCGS OF 96-2 NCGS OF 96-1 Speer 35 I P and quartz-epidote rock. 1989 82 M isolated groups of outcrops and residual boulders, on both sides of Avents Creek north DALTON F TOCCOA MOREHEAD am - amphibolite: black to greenish-black, slightly foliated to lineated and locally schistose Speer LANCASTER LAURINBURG ELIZABETHTOWN NEW RIVER CITY overturned overturned of Cokesbury. The largest body is about 250 meters across. The occurrences are am Carpenter, P.A., Carpenter, P.A., 1989 hornblende amphibolite. Contains minor interlayered felsic gneiss, biotite gneiss, Carpenter, P.A., 84 synform antiform interpreted to be intrusive plugs. The rocks are mineralogically similar to some rocks Stoddard and Stoddard, E.F., Carpenter, R.H., Carpenter, R.H., 83 76 Carpenter, R.H., 81 antiform synform muscovite schist, and biotite schist. Locally contains chlorite and/or biotite. Clark Clark and Heller Carpenter, P.A., Stoddard, Speer, and of the Buckhorn Dam intrusive suite but are spatially separated from the main part of and Speer Carpenter, P.A., NCGS OF 96-3 Stoddard 1998 Carpenter, R.H., Huntsman, Stoddard FLORENCE WHITEVILLE WILMINGTON 1998 and the suite and may be unrelated. FAULT ROCKS NCGS OF 98-5 and Speer, J.A. and Speer 1994 (rev. 1995) NCGS OF 98-4 Carpenter, R.H. 34 34 1998 NCGS OF 94-3 80 CZmv - interlayered mafic, intermediate, and felsic metavolcanic rocks: Mainly dark Trfb - fault breccia: silicified and/or hematite-stained fault breccia containing MYRTLE CZmv Trfb CAPE FEAR green to light gray, fine-grained metavolcanic rocks with well-developed schistosity; BEACH angular clasts of Triassic and pre-Triassic rock material along Jonesboro fault. composed mainly of quartz, feldspar, epidote, chlorite, actinolite, biotite, and muscovite. Carpenter, P.A. my - mylonite and mylonite gneiss: Recrystallized mylonite and thinly banded ribbon Carpenter, P.A., Carpenter, R.H., Carpenter, P.A., Carpenter, P.A., 79 78 77 Butler, Blake, Carpenter, P.A., Carpenter, P.A., Czu - meta-ultramafic rocks: Dark green, coarse- to fine-grained, semi-schistose to my Blake, Butler, Carpenter, R.H., and and and CZu gneiss along Falls Lake thrust. and Clark and 1990 and Clark Wilson, W.F., Stoddard, E.F. Carpenter, R.H., Carpenter, R.H., massive rocks composed mainly of chlorite, actinolite, talc (?), opaque minerals, and NCGS OF 96-3 Carpenter, R.H., NCGS OF 90-7 and Speer, J.A., 1998 epidote, locally with relict clinopyroxene. Rocks occur in three small areas; two small NCGS OF 98-1 bodies occur on the western bank of the Cape Fear River and one is associated with (and probably gradational into) metagabbro just south of the Jonesboro fault near Corinth. The age is uncertain, but the rocks are possibly related to the Buckhorn Dam intrusive suite.