Bedrock geologic map of the Shingle Hollow 7.5-minute quadrangle, Rutherford and Polk Counties, North Carolina

North Carolina Department of Environmental Quality Division of Energy, Mineral and Land Resources Kenneth B. Taylor, State Geologist CORRELATION OF MAP UNITS DESCRIPTION OF MAP UNITS < о > о Q ОС О Poor Mountain Formation stratigraphic relations uncertain Dysartsville Complex Odfb N1 ol cc, ш| o| cc" O-l O* I! 1' Tallulah Falls Formation ezttb INTRODUCTION The Shingle Hollow 7.5-minute quadrangle is in the southwestern portion of the Piedmont physiographic province in Polk and Rutherford counties, North Carolina. The quadrangle lies west of Rutherfordton, NC and northeast of Columbus, NC. It is located within the Rutherfordton- Spindale-Forest City metropolitan projected growth area. The major transportation corridoris U.S. Highway Alt 74. Total elevation relief is 1161 feet with a low of 774 feet on the Broad River and a high of 1935 feet on Toms Mountain. Major water features include the Broad River and its tributaries, Cove Creek and Mountain Creek. GEOLOGIC OVERVIEW Bedrock of the Shingle Hollow quadrangle comprises the following units of the Tugaloo terrane (Hatcher and others, 2007): Neoproterozoic to early Cambrian Tallulah Falls Formations (TFF); Neoproterozoic to Ordovician Dysartsville Complex (DC); and Ordovician Poor Mountain Formation (PMF). These units are interpreted to lie within the Six Mile Thrust Sheet of Griffin (1974). The TFF consists of meta-sedimentary and meta-igneous rocks interpreted to have been deposited in a distal marine basin outboard of the Laurentian rifted margin (Hatcher and others, 2007). TFF rocks on the quadrangle have been metamorphosed to upper amphibolite facies and are migmatitic. The DC is an undifferentiated unit composed of complexly interlayered felsic and biotite gneisses with minor interlayers of other lithologies commonly found in the TFF and PMF. These felsic and biotite gneisses are interpreted to be related to the Dysartsville gneiss, a tonalite mapped north of the quadrangle with a U-Pb crystallization age of 468 ± 8 Ma (Bream 1999, 2003). In its type area the Dysartsville gneiss is interpreted to intrude the TFF, but no sharp contacts have been observed on the Shingle Hollow quadrangle. Instead, locally observable transitions from felsic gneiss to biotite gneiss leaves the possibility that some components of the Dysartsville Complex are composed of diatexite migmatite and granitic magma formed through extensive anatexis of the TFF. The PMF contains sillimanite-grade meta-sedimentary units interlayered with mafic and felsic meta-volcanic rocks. The PMF is interpreted to be unconformably deposited on the TFF and DC. Alternatively, it is possible that the contact with underlying units may be faulted in places as evidenced by shearing and mylonitization in PMF rocks. The PMF is generally more resistant to weathering and occupies topographic highs on much of the southern and eastern portions of the quadrangle. The TFF, DC, and PMF are intruded by a younger, coarse-grained granitoid. This granitoid is unmappable at 1:24, 000-scale. In the NW section of the quadrangle, a ductile thrust fault places a composite thrust sheet of TFF/DC/PMF structurally on top of the PMF. This inverted stratigraphy differs from other sections of the quadrangle and surrounding quadrangles where the PMF is structurally and stratigraphically higher than the TFF. Foliations generally strike NE-SW and most dip less than 35 degrees to the SE. Prominent ESE-WNW and WSW-ENE joint sets were identified on the quadrangle. REFERENCES Bream, B.R., 1999, Structural and Stratigraphic Relationships of Ortho- and Paragneisses Southwest of Marion, North Carolina [Master’s Thesis]: Knoxville, University of Tennessee, 155 p. Bream, B.R., 2003, Tectonic Implications of Para- and Orthogneiss: Geochronology and Geochemistry from the Southern Appalachian Crystalline Core [Ph.D. dissertation]: Knoxville, University of Tennessee, 296 p. Griffin, V.S., 1974, Analysis of the Piedmont in Northwest South Carolina, Geological Society of America Bulletin, v.85, p. 1123-1138. Hatcher, R.D., Jr., Bream, B.R., and Merschat, A.J., 2007, Tectonic map of the southern and central Appalachians: A tale of three orogens and a complete Wilson cycle, in Hatcher, R.D., Jr., Carlson, M.P., McBride, J.H., and Martinez Catalan, J.R., eds., 4-D Framework of Continental Crust: Geological Society of America Memoir 200, p. 595-632. Poor Mountain Formation (PMF) Opm Undivided — Heterogeneous unit of metagraywacke, schist, amphibolite, quartzite, metasandstone, meta-arkose, quartzo-feldspathic gneiss, and calc- silicate. Metagraywacke — medium-light-gray to medium-dark-gray; medium- to coarse-grained; foliated; locally mylonitic; equigranular to inequigranular; granoblastic to lepidoblastic; locally migmatitic; consists of quartz, plagioclase feldspar, biotite, muscovite, potassium feldspar, garnet, minor sericite and accessory minerals, and trace opaque minerals. Schist — silvery-gray to light-reddish-gray; fine- to medium-grained; inequigranular; lepidoblastic and porphyroblastic; typically has a sheared (S-C) fabric; locally migmatitic; consists of muscovite, sillimanite, biotite, garnet, quartz, feldspar, and trace opaque minerals, tourmaline, and apatite. Calc-silicate — light-gray; medium- to coarse-grained; weakly foliated; consists of quartz, feldspar, epidote group minerals, garnet, biotite, and trace chlorite. Locally interlayered with amphibolite. Amphibolite — locally present structurally beneath metasandstone, quartzite, and meta-arkose layers and as a minor rock type throughout other map units of the Poor Mountain Formation. Amphibolite is typically mottled white to dark-green to black; fine- to coarse-grained; foliated; equigranular to nematoblastic; consists of hornblende, plagioclase, biotite, epidote group minerals, quartz, and minor garnet, chlorite, pyroxene, titanite, and opaque minerals. Locally interlayered with calc-silicate. Opmq Metasandstone/Quartzite/Meta-arkose — Very pale-orange to grayish-orange to grayish-purple; dusky-yellowish-brown on weathered surfaces; fine- to medium-grained; foliated; equigranular; granoblastic; consists of quartz, potassium feldspar, plagioclase feldspar, garnet, biotite, muscovite, epidote, sillimanite, and opaque minerals. Interlayered with lesser amounts of metagraywacke, schist, quartzo-feldspathic gneiss, and amphibolite. Dysartsville Complex (DC) Odfb Felsic and biotite gneisses — Undifferentiated unit composed of complexly interlayered felsic gneiss and biotite gneiss with minor interlayers of amphibolite, pelitic schist, metagraywacke, and metasandstone of the TFF, as well as hornblende gneiss of uncertain affinity. Felsic gneiss — light-tan to light-gray; fine- to coarse-grained; semi-massive to foliated; consists of quartz, plagioclase, potassium feldspar, biotite, white mica, epidote group minerals, hornblende, minor chlorite, and trace opaque minerals. Biotite gneiss — typically gray to grayish-black; medium- to coarse-grained; well foliated; compositionally layered; locally protomylonitic; inequigranular; locally porphyroblastic to lepidoblastic; migmatitic; consists of plagioclase, quartz, biotite, potassium feldspar, muscovite, garnet, epidote group minerals, chlorite, and opaque minerals. Hornblende gneiss — mottled white to greenish-black on fresh surfaces; weathered surfaces are mottled white to dark-reddish-brown; medium- to coarse¬ grained; foliated; massive to well-layered; equigranular; migmatitic; consists of hornblende, plagioclase, quartz, biotite, epidote group minerals, titanite, actinolite, magnetite, minor muscovite and opaque minerals, and trace apatite, monazite, chlorite, and zircon. Biotite granitic gneiss layers within hornblende gneiss are gray to grayish-black; medium- to coarse-grained; foliated; migmatitic; consists of plagioclase, quartz, biotite, muscovite, hornblende, minor epidote group minerals, sericite, and trace apatite. Tallulah Falls Formation (TFF) ezttb Biotite gneiss — Heterogeneous unit consisting of biotite gneiss interlayered with lesser amounts of metagraywacke, schistose metagraywacke, mica schist, metasandstone, amphibolite, felsic gneiss, and hornblende-biotite gneiss. Biotite gneiss is typically gray to grayish-black; medium- to coarse¬ grained; well foliated; compositionally layered; locally protomylonitic; inequigranular; locally porphyroblastic to lepidoblastic; migmatitic; consists of plagioclase, quartz, biotite, potassium feldspar, muscovite, garnet, epidote group minerals, chlorite, and opaque minerals. Commonly interlayered with other TFF and DC lithologies. Metagraywacke — medium-light-gray to medium-dark-gray; medium- to coarse-grained; foliated (ranges from massive to gneissic); equigranular to inequigranular; granoblastic to lepidoblastic; migmatitic; consists of quartz, plagioclase, biotite, muscovite, potassium feldspar, and minor garnet, opaque minerals, epidote, and apatite; thickness of layering ranges from decimeters to meters. Interlayered at all scales with other TFF and DC lithologies. Amphibolite — amphibolite is typically mottled white to dark-green to black; fine- to coarse-grained; foliated; equigranular to nematoblastic; consists of hornblende, plagioclase, biotite, epidote group minerals, quartz, and minor garnet, chlorite, pyroxene, titanite, and opaque minerals. Commonly interlayered with other TFF and DC lithologies. Mineral abundances are listed in decreasing order of abundance based upon visual estimates of hand samples and thin sections. SCHMIDT EQUAL AREA STEREONET DATA Equal area Schmidt Net projection of contoured poles to foliation. Foliation count 769. Equal area Schmidt Net projection of bearing and plunge directions of fold hinges in blue and mineral lineations in red. Fold hinge count 7. Mineral lineation count 8. Equal area Schmidt Net projection of contoured poles to mylonitic foliation. Foliation count 35. Equal area Schmidt Net projection of contoured poles to joints and unidirectional rose diagram inset. Joint count 471. STREAM SEDIMENT HEAVY MINERAL ANALYSIS Stream sediment heavy mineral analysis was conducted from March 2017 through April 2017 to aid geologic mapping, better define conditions of metamorphism, and inventory minerals of potential economic significance. Procedure: In the field, approximately 13.6 kg of stream sediment material was panned to approximately 300 g of heavy mineral concentrate at each sample locality. In the laboratory, concentrate was washed and passed through heavy liquid separation using tetrabromoethane, and scanned with short- and long-wave ultraviolet illumination using an Ultra-violet Products Inc. Model UVGL-48 Mineralight Lamp. Magnetite was removed with a hand magnet. A sample split was grain mounted on a standard 27x46 mm glass slide and approximately 200 grains are identified and counted with the aid of a petrographic microscope and 1.67 index of refraction oil. Results of stream sediment heavy mineral analysis are tabulated below. Mineral abbreviations used in table: Mg-magnetite; Gt-garnet; Zr-zircon; Bt-biotite; Rt-rutile; Czo- clinozoisite; Ep-epidote; St-staurolite; Sil-sillimanite; Hbl-hornblende; Ttn-titanite; Tur-tourmaline; llm-ilmenite and other black opaque minerals; Hem-hematite and other red opaque minerals; Lx-leucoxene; Ud-unidentified. SAMPLE1 COORDINATES (State Plane, NAD 83 m) MAP UNITS DRAINED2 % TOTAL H MIN SAMPLE3 PERCENT HEAVY MINERALS IN SAMPLE 4 Mg Gt Zr Bt Rt Czo Ep St Sii Hbl Ttn Tur llm Hem Lx Ud NB218 185,484N; 330,790E Opm, CZtfb 0.21 9.50 3.17 1.81 0.91 - - 4.53 3.17 0.91 40.73 0.91 - 25.34 6.79 2.26 - NB219 1 89,761 N; 330,621 E Odfb 0.38 51.72 1.69 3.14 0.48 0.24 5.55 5.79 0.48 - 8.93 1.21 - 19.31 1.21 - 0.24 NB220 1 90,31 9N ; 334,71 1E €Ztfb, Odfb 0.40 9.48 - 19.01 1.36 0.91 2.72 6.79 - 1.81 1.36 13.58 0.45 40.28 1.81 - 0.45 NB221 1 88,21 4N; 327,852E Odfb 0.56 71.57 2.56 3.41 0.43 - 0.57 5.12 - 0.14 10.66 1.56 - 2.27 1.00 0.71 - NB225 185,620N; 336,059E Opm 0.73 1.64 2.46 2.46 1.48 0.98 2.95 3.93 2.46 0.98 62.95 2.95 0.98 13.28 - - 0.49 'Sample numbers correspond to stream sediment heavy mineral sample localities shown on geologic map. 2Up to three most dominant map units contributing to the drainage basin, listed in decending order of map area. Percentage of heavy minerals in 13.6 kg stream sediment sample. 4Point count percentages of heavy minerals from processed samples. WHOLE ROCK ICP ANALYSIS1 OF SELECTED SAMPLES This geologic map was funded in part by the USGS National Cooperative Geologic Mapping Program. 82"7'30" MEANDj eztfb Toms Mountain Wevtown SPRING VALLEY DR. Anderson Shoal Shingle Hollow ezttb MARKET- fig Odfb /WraldpyyCL ezttb TIMBER ROC PleasanbCrove Сет/ ezttb NB139 [B220 Odfb NB219 ezttb TURNER ezttb NB165 BC151 Odfb STARVIEW eztfb Green Hill Cem NB24 VVII DWM>I> RD Whitesidesi .Bridge CLARK RD ^WILDERNESS, ezttb * eztfb eztfb 35"22'30' >22 eztfb 80 О \ \ ч ( 1 Cr \ X . > у Topographic base produced by the United States Geological Survey. Altered by the North Carolina Geological Survey for use with this map. North American Datum of 1 983 (NAD83). World Geodetic System of 1984 (WGS84). Projection: State Plane North Carolina FIPS 3200 (Meters) 4,000-meter ticks: State Plane North Carolina FIPS 3200 (Meters) Roads . ©2006-2012 TomTom Names . GNIS, 2013 Hydrography . National Hydrography Dataset, 2012 Contours . National Elevation Dataset, 2008 Boundaries . Census, IBWC, IBC, USGS, 1972 - 2012 6‘ 42' 119 MILS 0‘ 37' — ТШЕГ MN SCALE 1 :24 000 Q5 MLCME1EFS 10CO 600 Q5 МЕГЭ6 0 icm 2XD 10CO 1000 2X0 3X0 MILE 4CCD 5000 eoco 7X0 80CO эхо 10ССО 1ГТМ GRIDANO 2013 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET U.S. National Grid 100,000-m Square ID LV MV Grid Zone Designation 17S FEET CONTOUR INTERVAL 40 FEET NORTH AMERICAN VERTICAL DATUM OF 1988 This map was produced to conform with the National Geospatial Program US Topo Product Standard, 2011. A metadata file associated with this product is draft version 0.6.11 NORTH CAROLINA • QUADRANGLE LOCATION ADJOINING 7.5 QUADRANGLES Moffitt Hill Sugar Hill Glenwood Lake Lure Shingle Hollow Ulllll-. rlMr.il ill North Mill Spring Pea Ridge Kllll. 11 1 :il :Г. South ROAD CLASSIFICATION Expressway Secondary Hwy Ramp Local Connector Local Road 4WD I Interstate Route / \ US Route ( j State Route SHINGLE HOLLOW, NC 2013 CAMOI c2 COORDINATES DOOIZ TVDC3 MAP OXIDES IN PERCENT ELEMENTS IN PPM6 oAlVIrLt (State Plane, NAD 83 m) nUUK 1 Yrt UNIT Si02 At03 Fe203 MgO CaO Na20 K20 Ti02 P,05 MnO Cr203 LOI4 Sum5 Ba Ni Sc Be Co Cs Ga Hf Nb Rb Sn Sr Та Th U V W Zr Y La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Mo Cu Pb Zn Ni As Cd Sb Bi a9 Au Hq Tl Se NB6 186,612N; 326,045E metagraywacke Opm 65.95 16.5 5.12 1.62 1.34 2.72 1.56 0.4 0.07 0.07 0.003 4.5 99.88 132 <20 20 2 8.5 2.1 18.5 5.1 11.3 74.7 3 64 0.7 6.2 1.7 64 <0.5 183.9 16.3 23.8 44.5 5.67 21.3 4.1 0.72 3.78 0.54 3.22 0.62 1.81 0.27 1.92 0.3 2.6 27 15.6 84 11.3 <0.5 <0.1 <0.1 <0.1 <0.1 <0.5 <0.01 0.4 <0.5 NB24 187.165N; 329,961 E bt-hbl-epi-quartzo-feldspathic gneiss Opm 67.79 14.77 5.86 0.55 4.4 3.75 0.79 0.49 0.1 0.09 0.003 1.2 99.86 244 <20 23 <1 13.3 <0.1 16.9 4.2 8.6 14.6 1 233 0.6 5.4 1.7 117 <0.5 144.8 22.5 19.5 40 4.99 19.8 4.13 0.93 4.02 0.66 3.92 0.87 2.46 0.38 2.55 0.4 1.1 7 3.4 47 3.7 0.5 <0.1 0.1 <0.1 <0.1 <0.5 <0.01 <0.1 <0.5 NB119 185,024N; 334,878E amphibolite & hbl-epi calc-silicate gneiss Opm 61.86 14.4 6.03 4.06 8.2 2.6 0.71 0.34 0.05 0.14 0.004 1.5 99.88 150 26 20 2 18.5 <0.1 14.9 3.2 4.7 18.7 1 187 0.4 6.5 2.3 121 <0.5 112.4 20.5 14.3 31.5 3.94 15 3.25 0.71 3.22 0.58 3.52 0.76 2.4 0.36 2.36 0.39 0.6 5.9 5.7 19 8.9 <0.5 <0.1 <0.1 <0.1 <0.1 1.5 <0.01 <0.1 <0.5 BC151 187.943N; 329,993E hbl-epi-calc-silicate gneiss CZtfb 66.64 13.38 6.15 1.14 9.3 1.21 0.14 0.77 0.38 0.14 <0.002 0.7 99.9 46 <20 22 <1 4.3 <0.1 23.3 1.5 1.8 <0.1 2 276.7 0.1 1.3 0.9 57 1.4 51.7 27.8 6.5 16.3 2.43 11.6 3.63 1.05 4.3 0.75 4.63 1.06 3.04 0.47 3.17 0.49 1.3 2.6 1.5 11 2 0.8 <0.1 <0.1 0.4 <0.1 <0.5 <0.01 <0.1 <0.5 NB139 1 90,691 N; 335,327E ms-bt-quartzo-feldspathic gneiss CZtfb 65.6 15.23 6.88 1.75 1.89 2.35 3.61 0.95 0.17 0.11 0.008 1.2 99.83 665 22 14 3 12.8 1.4 23.8 8.6 18.9 126.7 2 194.6 1 8.4 2.5 83 0.8 321.4 39 33.6 66.6 8.55 32.6 6.73 1.37 6.57 1.06 6.59 1.47 4.23 0.64 4.07 0.64 2.1 16.9 4.5 89 19.7 <0.5 <0.1 <0.1 <0.1 <0.1 1.4 <0.01 0.5 <0.5 NB77 189.749N; 326.818E biotite granitic gneiss CZtfb 76.14 12.53 2.02 0.32 1.5 2.66 3.31 0.12 0.02 0.04 <0.002 1.2 99.93 777 <20 5 1 2.6 0.5 13.5 2.9 1.9 73.2 <1 57.1 <0.1 6.7 1 12 <0.5 88 2.4 1.9 15.6 0.49 1.7 0.3 0.13 0.36 0.06 0.48 0.1 0.34 0.06 0.55 0.1 1.1 5 4.1 20 2 <0.5 <0.1 <0.1 <0.1 <0.1 <0.5 <0.01 <0.1 <0.5 NB61 190,886N; 331.709E meta-arkose Odfb 87.61 5.72 1.73 0.13 1.08 0.38 0.08 0.34 0.05 0.03 <0.002 2.8 99.91 21 <20 13 1 1.7 <0.1 6.8 5 5.3 <0.1 <1 34 0.3 2.8 1.5 16 <0.5 193.7 15.2 7.1 16.4 2.12 9 2.27 0.38 2.46 0.42 3.01 0.68 2.15 0.36 2.63 0.46 1.1 4.4 1.8 4 3.6 <0.5 <0.1 <0.1 <0.1 <0.1 <0.5 0.01 <0.1 <0.5 NB165 188,793N; 335.822E biotite granitic gneiss Odfb 73.27 13.51 2.5 0.65 1.45 2.24 1.81 0.23 0.06 0.04 0.002 4.1 99.91 544 <20 4 2 6.1 0.1 15.8 3.5 4.5 48.1 <1 112.5 0.1 7.3 0.6 27 <0.5 112.4 5.1 17.4 68.9 3.49 12.8 2.37 0.56 2.01 0.26 1.38 0.24 0.66 0.09 0.76 0.11 1.1 5.7 3.9 32 3.5 <0.5 <0.1 <0.1 <0.1 <0.1 <0.5 <0.01 0.2 <0.5 NB175 188.405N; 330.158E bt-hbl-quartzo-felspathic gneiss Odfb 74.33 13.57 2.14 0.45 2.64 3.08 0.26 0.25 0.04 0.03 <0.002 3.1 99.92 85 <20 12 3 2.6 <0.1 14.5 3.1 3.2 2.3 1 146.6 0.3 2.6 1.3 9 <0.5 100.7 17.2 4.4 31.9 1.39 6.4 2.13 0.57 2.94 0.58 3.71 0.82 2.73 0.44 3.56 0.6 1.4 5 2.5 11 2.2 <0.5 <0.1 <0.1 <0.1 <0.1 1.8 <0.01 <0.1 <0.5 BC119 191.564N; 330,1 97E amphibolite Odfb 48.76 14.88 12.16 8.24 9.51 3.66 0.74 0.5 0.06 0.19 0.091 1.1 99.89 54 157 42 <1 50.6 <0.1 15.4 1.1 0.8 9.7 <1 82.2 <0.1 1 0.2 261 <0.5 35.9 13.7 2.9 7.3 1.05 4.9 1.43 0.55 1.92 0.35 2.39 0.53 1.73 0.24 1.71 0.25 0.8 17.2 1.6 26 51.7 <0.5 <0.1 <0.1 <0.1 <0.1 <0.5 <0.01 <0.1 <0.5 ’Whole Rock Inductively Coupled Plasma - Atomic Emission/Mass Spectrometer analysis conducted by Bureau Veritas, 9050 Shaughnessy St, Vancouver, BC Canada V6P 6E5. 2Sample numbers correspond to thin section and whole rock sample localities shown on geologic map. 3Mineral abbreviations used in table: bt-biotite; epi-epidote; hbl-hornblende; ms-muscovite. 4LOI = loss on ignition in percent. 5SUM = Sum total in percent. 6PPM = parts per million. Ni analyzed by Bureau Veritas LF200 and AQ200 procedures. Fault Contact - — - - arrows indicate relative motion along fault Form Lines interpretive patterns ol subsurface toliatlon orientations based upon surlicial structural measurements Research supported by the U.S. Geological Survey, National Cooperative Geologic Mapping Program under STATEMAP (Award - G16AC00288, 2016 and 2017, G17AC00264). The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. Bedrock Geologic Map of the Shingle Hollow 7.5-minute Quadrangle, Rutherford and Polk Counties, North Carolina By Bart L. Cattanach, G. Nicholas Bozdog, Sierra J. Isard, and Richard M. Wooten Geology mapped from August 2016 to June 2018. Map preparation, digital cartography and editing by G. Nicholas Bozdog, Bart L. Cattanach, and Sierra J. Isard 2018 This is an Open-File Map. It has been reviewed internally for conformity with North Carolina Geological Survey mapping standards and with the North American Stratigraphic Code. Further revisions or corrections to this Open File map may occur. Some station data omitted from map to improve readability. Please contact the North Carolina Geological Survey for complete observation and thin-section data. North Carolina Geological Survey Open File Report 2018-12 EXPLANATION OF MAP SYMBOLS CONTACTS Contact — Identity and existence certain, location inferred Thrust fault — Identity and existence certain, location inferred. Sawteeth on upper (tectonically higher) plate. PLANAR FEATURES (For multiple observations at one locality, symbols are joined at the "tail" ends of the strike lines) Inclined metamorphic or tectonic foliation — Showing strike and dip Inclined metamorphic or tectonic foliation, for multiple observations at one locality — Showing strike and dip 7,// Small, minor inclined joint — Showing strike and dip Small, minor inclined joint, for multiple observations at one locality — Showing strike and dip X Vertical metamorphic or tectonic foliation — Showing strike Vertical metamorphic or tectonic foliation, for multiple observations at one locality — Showing strike Small, minor vertical or near-vertical joint, for multiple observations at one locality — Showing strike "X Inclined mylonitic foliation — Showing strike and dip Inclined mylonitic foliation, for multiple observations at one locality — Showing strike and dip ® Horizontal metamorphic or tectonic foliation LINEAR FEATURES X X Inclined aligned-mineral lineation — Showing bearing and plunge Inclined lineation at intersection of two foliations — Showing bearing and plunge Inclined fold hinge of generic (type or orientation unspecified) small, minor fold — Showing bearing and plunge OTHER FEATURES о Float station NB206 A Thin section and whole rock analysis sample location NB392 (•) Heavy mineral sample location X Prospect (pit or small open cut) X Abandoned sand, gravel, clay, or placer pit NATURAL RESOURCES SDG - Sand and gravel MIC - Mica GENERALIZED STRATIGRAPHY AND SEQUENCE OF TECTONIC EVENTS IN CROSS-SECTIONAL VIEW Ordovician lntrusion(?)/formation of Dysartsville Complex synchronous with deformation and metamorphism of Tallulah Falls Formation. Followed by deposition of Poor Mountain Formation Devonian - Mississippian Peak metamorphism, deformation, & faulting TRAVERSE MAP Hillshade derived from a six meter pixel resolution LiDAR (Light Detecting And Ranging) digital elevation model. Red lines show paths of field traverses. ЙГ; \ * JA j_L <? f И /^4“ ( / 1У/- ' Shingle Hollow 7.5-minute Quadrangle, Open File Report 2018-12