BC Geological Survey 07 43 44 GEOSCIENCE MAP 2009-2 45 Yellow 46 Nimpkish-Telegraph 06 Bluff 47 Cove Area Geology of the Nimpkish-Telegraph Cove Port McNeill 48 92L/7, 10 49 650000E Area, Northern 05 British Gordon Campbell River 51 Green Bluff NTS 92L/7, 10 Islet 52 Vancouver Columbia 53 Island 04 Flagstaff 54 Vancouver G.T. Nixon, M.C. Kelman, J.P. Larocque, D.B. Stevenson, L.A. Stokes, Islet 55 Canada 56 USA Pals, A., Styan, J., Johnston, K.A., M.J. Orchard and C.A. McRoberts 60 57 65 28 42 87 03 57 44 Victoria 35 58 PALEONTOLOGY GEOLOGY 59 45 by by 30 Ella Wastell 660000E 32 Lewis Point Islets Olympic 21 Point Telegraph 0 100 200 M.J. ORCHARD (Geological Survey of Canada) G.T. NIXON, M.C. KELMAN, J.P. LAROCQUE, 02 Bauza 61 281 Cove Wastell Peninsula C. A. McROBERTS (SUNY, Cortland) D.B. STEVENSON, L.A. STOKES, A. PALS, J. STYAN Point Islet Blinkhorn 62 kilometers 25 k e Bauza e Peninsula and K.A. JOHNSTON (BC Geological Survey) r Cove 63 C 50 64 01 40 40 0 24 Beaver Cove 64 65 25 45 66 22 33 kilometres N 30 22 67

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5 e m ie 670000E LAYERED ROCKS MAP SYMBOLS h 38 T 12 14 71 r 99 e UPPER CRETACEOUS iv 72 Geological contact, defined R NANAIMO GROUP EQUIVALENTS (IN PART) 73 Roselle 75 Geological contact, approximate Lake 279 262 Campanian to ?Maastrichtian 45 74 30 Geological contact, inferred 98 75 Medium to coarse-grained arkosic to lithic wacke, pebble to cobble conglomerate, Zellerbach Thiemer uKN siltstone and minor coal; locally fossiliferous Steeply dipping fault, defined 221 35 76 Lake 10 28 5 15 Cr 77 Steeply dipping fault, approximate 16 eek k ee UPPER TRIASSIC (CARNIAN) TO MIDDLE JURASSIC (BAJOCIAN) Cr 97 97 Steeply dipping fault, inferred 25 n BONANZA GROUP o lt su sh Carnian to Rhaetian (Nimpkish-Telegraph Cove area) Limit of mapping T ka ai 30 K Sua 15 24 9 348 PARSON BAY FORMATION Bedding, facing known, inclined, horizontal, vertical 30 Lake 24 Robson Medium grey to black, thinly laminated to medium bedded, impure limestone, calcareous to 14 96 19 96 k Volcanic flow lamination, inclined S 21 e uTrP non-calcareous mudstone, siltstone and shale intercalated with variable proportions of grey- 42 u e 35 K a r green lithic feldspathic/tuffaceous wacke, minor crystal-lithic tuff and reworked equivalents, a Bight 46 C C i Plutonic flow lamination, inclined, vertical re k a volcaniclastic breccia and debris-flow deposits, and rare vitric tuff, pebbly sandstone and 68 ek 20 n 64 s h h o conglomerate; shale locally yields abundant thin-shelled bivalves (Halobia sp., Monotis sp.) 14 J Dike, inclined, vertical 95 limestone locally contains rare algal structures and, near the top of the succession, sparse 27 95 r 31 i S colonial corals (Sutton limestone equivalent?) Minor fold with plunge 17 Cr 60 42 eek 17 k e Minor fold with dip of axial plane e Dark grey-green basaltic volcaniclastic breccia and lapilli tuff; aphanitic to 11 349 21 r C uTrPvmc clinopyroxene-olivine±plagioclase-phyric (Nimpkish-Telegraph Cove area) S 79 32 T 76 26 Recumbent fold c 94 94 s h 10 u 10 m 11 l

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o n o i Lineation, inclined (slickenfibres on fault plane) s d n ob 38 R t Dark grey-green basaltic flows and minor volcaniclastic breccia and lapilli tuff; aphanitic 46 31 16 uTrPfmc to clinopyroxene-olivine±plagioclase-phyric (Nimpkish-Telegraph Cove area); minor Lineation, horizontal (slickenfibres on fault plane) interbedded mudstone, siltstone, wacke and shale, locally fossiliferous 45 19 93 81 93 Axial trace of syncline 36 14 30 Dark grey-green, andesitic volcaniclastic breccia and lapilli tuff; TIN uTrPvi Macrofossil locality (age code as below) 23 34 18 aphanitic to sparsely plagioclase-phyric C TlC(lP) 30 r e Conodont locality (age code as below) e k 92 042 92 Dark grey-green andesitic flows; MINFILE Locality 15 uTrPfi aphanitic to sparsely plagioclase-phyric 29 Calc-silicate skarn (±sulphide) 4 22 Ida Dark grey to reddish grey rhyolite-dacite volcaniclastic breccia and variably reworked Manto-type deposit (massive sulphide) 91 91 uTrPvf lithic and vitric tuff; minor sedimentary and basalt-andesite volcaniclastic interbeds 19 Lake 16 3 Outcrop examined R 34 Mudge i 75 v 24 er 17 40 Lake

41 5 Thin interbeds of basaltic to andesitic volcaniclastic breccia Outcrop too small to show at map scale

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5 Road (paved) 5 25 11 24 UPPER TRIASSIC 48 Rail line 34 VANCOUVER GROUP 4 89 13 89 Rail line (abandoned) 51 Carnian to Early Norian (Nimpkish-Telegraph Cove area) 10 44 24 FORMATION Fossil age designation 28 72 8 11 25 20 29 Medium to pale grey, thinly bedded to massive micritic limestone and locally bioclastic T Late Triassic; J Jurassic 12 17 uTrQ 88 33 10 88 limestone; minor silica replacements and chert nodules; rare laminated interbeds, oolitic e early; m middle; l late layers and algal structures; locally fossiliferous; unit is very thin (<40m) on the West Coast 9 16 Late Triassic: C Carnian; N Norian 5 24 37 Carnian (possibly latest Middle Triassic (Ladinian) at the base) 186 6 Ammonoid Zones: (K) Kerri; (D) Dawsoni; (M) Magnus; 109 KARMUTSEN FORMATION 87 87 (Cb) Columbianus; (R) Rutherfordi; (C) Cordilleranus Halfway 20 12 18 43 35 Conodont Zones: (N) Nodosus; (P) Primitius 16 17 k uTrK Undifferentiated dark grey-green basalt flow/hyaloclastite/pillow lava (outside the map area) ree Islands 26 29 C l lower; u upper 47 19 k 97 e (combined codes indicate age/zone range) 45 e 86 Upper Karmutsen Formation: Flow Member 86 r 46 38 17 35 20 C Aphanitic to plagioclase-phyric and minor plagioclase-megacrystic flows, commonly (no label indicates age indeterminate) uTruKf 30 15 amygdaloidal and locally exhibiting laminar flow features (vesicle trains) and pipe vesicles; 14 36 338 280 may include minor pillow lava and hyaloclastite 73 60 34 85 85 24 19 Plagioclase-megacrystic (<2cm) flows; commonly amygdaloidal and locally 339 as 20 26 exhibiting trachytoid textures; intercalated with aphanitic or plagioclase-phyric om 11 No basalt near the top of the succession 22 35 56 10 20 Thin (~5m) beds and lenses of pale to medium grey, micritic to rarely bioclastic 19 84 84 uTruKls or oolitic limestone intercalated with basalt near the top of the flow succession 25 73 21 Base Map Information 87 18 Base map produced from digital TRIM (Terrain 78 25 Thin (0.5-5m) beds and lenses of uTruKls e 83 Resource Inventory Management) 1:20 000-scale 83 28 rin the topographic database, Ministry of 42 a 45 C Environment, Lands and Parks. 38 77 Middle Karmutsen Formation: Hyaloclastite Member 133 Massive to thickly bedded hyaloclastite breccia, including pillow-fragment breccia North American Datum 1983 (NAD83). Universal Cre 13 Warm ek uTrmKh and medium bedded to laminated hyaloclastite sandstone; may locally be partially Transverse Mercator Projection (Zone 9). Elevation in 82 78 82 metres above mean sea level. Contour interval 100m. or possibly completely replaced by pillowed flows 26 y 121 15 e Lake r 17 o t S 14 40 uTrmKp Closely packed pillowed flows; aphanitic and variably amygdaloidal 48 208 37 27 Creek 81 8 81 60 26 26 24 36 57 14 Lower Karmutsen Formation: Pillow Member

a Closely packed pillowed flows and localized, massive inflated flow lobes; typically aphanitic 32 n 35 5

a 5 N i uTrlKp

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7 k N 5 5 4 e 5 11 e Rare thin lenses of calcareous mudstone/limestone; 9 r 1º 44' t C 6 25 iot may contain fine-grained hyaloclastite detritus 10 14 Ell Approximate mean magnetic 18 18 132 38 declination July 2009 for centre 17

79 Grid North 79 5 18 of map area: 18 degrees Magnetic 45 25 ud 41 minutes east, decreasing Declination Ki la nma 25 C annually 13 minutes per year n 30 18 25 52 29 INTRUSIVE ROCKS 119 24 14 Fickle 78 8 7 78 30 Lake 120 3 EARLY (HETTANGIAN) TO MIDDLE (BAJOCIAN) JURASSIC 118 36 54 ISLAND PLUTONIC SUITE 206 207 C re Medium to coarse-grained, equigranular granitoid rocks and porphyry; includes 30 ek 77 77 JI hornblende+/-biotite-bearing diorite (di), quartz diorite (qdi), quartz monzodiorite (qmd), quartz uTrP 254 monzonite (qm), granodiorite (gd), tonalite (tn), granite (g), plagioclase+/-hornblende porphyry Selected References k 134 e B (po) and undifferentiated granitoid rocks (JI) 30 e o Tsitika 15 r n an Gunning, H.C. (1930): Geology and mineral deposits of Quatsino- C za Lake 68 Nimpkish area, Vancouver Island; Geological Survey of Canada, Agmatite: angular to rounded xenoliths of variably recrystallized Karmutsen 76 55 76 JIag Summary Report 1929, Part A, pages 94-107. A volcanic rocks set in a medium grained granitoid mesostasis t e l l 49 u e Gunning, H.C. (1932): Preliminary report on the Nimpkish Lake c te Claud k k 14 S quadrangle, Vancouver Island, British Columbia; Geological Survey

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e Elliot T r of Canada, Summary Report 1931, Part A, pages 22-35. lak 66 Minor Intrusions w C a C 164 River 17 14 ree 35 Lake 75 75 31 k TERTIARY (?NEOGENE) Gunning, H.C. (1938a): Preliminary geological map, Nimpkish, 6 Anutz East Half; Geological Survey of Canada, Paper 38-2. 337 Basalt dike; plagioclase-clinopyroxene-phyric; possibly coeval with Alert Bay volcanic unit Gunning, H.C. (1938b): Preliminary geological map, Nimpkish, 31 38 35 Steele 60 Lake West Half; Geological Survey of Canada, Paper 38-3. 6 Lake 74 255 74 Hoadley, J.W. (1953): Geology and mineral deposits of Zeballos- 52 37 52 C LATE TRIASSIC TO MIDDLE JURASSIC 296 49 la u Nimpkish area, Vancouver Island, British Columbia; Geological 30 d Survey of Canada, Memoir 272, 82 pages. 15 Basalt-andesite subvolcanic intrusion or diabase eek TrJBim Cr coeval with Bonanza Group volcanism Massey, N. W. D., McIntyre, D.G., Desjardins, P. J. and Cooney, 73 73 R. T. (2005): Digital geology map of British Columbia: whole province; B. C. Ministry of Energy, Mines and Petroleum 9 Wo 11 ck ode LATE TRIASSIC TO EARLY JURASSIC Resources, Geofile 2005-1. Atlu ngl Creek Olivine-clinopyroxene±plagioclase porphyry coeval with Muller, J. E. and Roddick, J. A. (1983): Alert Bay - Cape Scott; 26 Geological Survey of Canada, Map 1552A, scale 1:250 000. eek mineralogically similar lavas of the Bonanza Group 72 Cr 72 Muller, J. E., Northcote, K. E. and Carlisle, D. (1974): Geology 29 E and mineral deposits of Alert Bay - Cape Scott map area, l eele l Vancouver Island, British Columbia; Geological Survey of 30 St i o t Canada, Paper 74-8, 77 pages. 71 71 Diana 92 Data Compilation Lake 161 193 64 78 171 G. T. Nixon, M. C. Kelman, K. A. Johnston, 5570000N

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5 Lake 15 e Recommended Citation e k Nixon, G. T., Kelman, M.C., Larocque, J. P., Stevenson, D.B., Stokes, L.A., Pals, A., 34 Digital Cartography Styan, J., Johnston, K.A., Friedman, R. M., Mortensen, J.K., Orchard, M. J. and 69 69 McRoberts, C.A. (2009): Geology of the Nimpkish-Telegraph Cove Area, 43 44 45 4647 48 49 650000E 51 52 5354 55 56 57 58 59 660000E 61 62 63 64 65 66 67 68 69 670000E 71 72 73 74 75 76 78 Northern Vancouver Island; B.C. Ministry of Energy, Mines and Petroleum G. T. Nixon and R. D. M. Rayner Resources, Geoscience Map 2009-2.