BC Geological Survey 92 9394 95 9697 9899 600000E 01 02 03 04 37 Cardigan 05 GEOSCIENCE MAP 2011-2 Rocks E Holberg Fault F 06 Raglan metres Point 07 1000 36 Geology, Geochronology, Lithogeochemistry and Metamorphism 08 uTruKf JIqpo 500 09 lmJH TrJN uTrP uTrQ uKN Scarlett 610000E of the Quatsino-Port McNeill Area, Northern Vancouver Island Point Tribune 35 0 Rock 11 uTrmKh NTS 092L/11 and parts of 92L/05, 12 & 13 George Boyle -500 lmJH 12 Balaklava Rock uTrlKp uTruKf uTruKf uTruKf Lake Island 13 G.T. Nixon, J.L. Hammack, V.M. Koyanagi, G.J. Payie, A.J. Orr, J.W. Haggart, 34 -1000 TrJN 14 uTrP Crane Islands uTrmKh? M.J. Orchard, E.T.Tozer, R.M. Friedman, D.A. Archibald, J. Palfy and F. Cordey -1500 15 (no vertical exaggeration) 33 Hussar 16 PALEONTOLOGY GEOLOGY GEOCHRONOLOGY Point Bell Island 17 by by by M.J. ORCHARD, E.T. TOZER (Geological Survey of Canada) G.T. NIXON, J.L. HAMMACK, V.M. KOYANAGI, R.M. FRIEDMAN (The University of British Columbia) 18 Lucan Heard J. PALFY (Hungarian Natural History Museum) G.J. PAYIE, A. J. ORR (BC Geological Survey) D.A. ARCHIBALD (Queen's University) 32 19 F. CORDEY (University of Lyon) J.W. HAGGART (Geological Survey of Canada) Boxer Quatsino - Port McNeill Area Islands Island G 620000E Point o Port Hardy (92L/11 & parts of Point rd on Port McNeill 92L/05, 12 & 13) Jerome Nolan 21 0 24 Island Is la Port Alice 31 n 22 Noble ds British Islets Blyth 23 Campbell River kilometres Islands Duncan 24 Vancouver Columbia Scale 1:50 000 Island Doyle 25 Island 563000N Island 26 Port Alberni Vancouver LAYERED ROCKS LAYERED ROCKS (Cont'd) MAP SYMBOLS 27 2011-1 2011-2 Nanaimo Canada USA 29 28 TERTIARY BONANZA GROUP - SOUTH OF HOLBERG FAULT (Cont'd) Geological contact, defined Victoria Neogene Upper Triassic (Carnian to Rhaetian) 29 Geological contact, approximate 630000E 2011-3 2011-4 2011-5 ALERT BAY VOLCANIC UNIT PARSON BAY FORMATION Geological contact, inferred 28 31 Dark to pale grey, basalt to rhyolite flows, flow domes and volcanic breccia; Medium grey to black, thinly laminated to medium bedded, impure limestone, calcareous to Olympic TAv aphanitic to porphyritic; minor interbedded sedimentary rocks including uTrP non-calcareous mudstone, siltstone and shale intercalated with variable proportions of grey- Steeply dipping fault, defined Frankham 32 0 100 200 Peninsula volcanic conglomerate, sandstone, siltstone, and debris-flow deposits green lithic feldspathic/tuffaceous wacke, minor crystal-lithic tuff and reworked equivalents, Point volcaniclastic breccia and debris-flow deposits, and rare vitric tuff, pebbly sandstone and Steeply dipping fault, approximate 33 kilometres Mier Point UPPER CRETACEOUS conglomerate; shale locally yields abundant thin-shelled bivalves (Halobia sp., Monotis sp.); 27 Steeply dipping fault, inferred 34 NANAIMO GROUP EQUIVALENTS (IN PART) limestone locally contains rare algal structures; may include coralline limestone near the top of the succession equivalent in part to Sutton limestone in the Cowichan Lake area, southern Unconformity, approximate 35 Campanian to ?Maastrichtian Vancouver Island 36 Grey to greenish grey and brown, medium to coarse-grained, arkosic to Unconformity, inferred Staples Numas 26 uKN lithic wacke, pebble to cobble conglomerate, siltstone and minor coal; Dark grey-green to maroon, coarsely clinopyroxene-plagioclase-phyric and uTrPfvmc AC Islet Islands 37 locally fossiliferous clinopyroxene-megacrystic basaltic flows and lesser volcaniclastic breccia Line of vertical cross-section and crystal-lithic lapilli tuff; minor tuffaceous wacke and siltstone reek 38 16 C Outcrop examined es Duval Island Duval QUEEN CHARLOTTE GROUP EQUIVALENTS (IN PART) Dark grey-green, basaltic tuff-breccia, crystal-lithic lapilli tuff and Songhe Point 39 Cenomanian or Lower Turonian to ?Santonian uTrPvfmc lesser flows; coarsely clinopyroxene-plagioclase-phyric 25 640000E Outcrop too small to show at map scale BLUMBERG FORMATION Lake 41 Dark grey-green, aphanitic to plagioclase-phyric basaltic to andesitic Structure Masterman uTrPvfm volcaniclastic breccia and flows 30 34 uKBcg Massive conglomerate with minor lenses of coarse-grained lithic wacke 40 Songhees Islands Bedding, inclined 24 24 14 Dark grey-green to reddish grey, coarsely plagioclase-clinopyroxene-phyric Volcanic flow lamination, inclined Cenomanian to ?Turonian uTrPfmc and clinopyroxene megacrystic(<1.5cm) basalt flow and flow breccia 30 Eutaxitic foliation/welding, inclined SHALE UNIT 64 Dillon 23 23 Dike, inclined, vertical Point Dark grey, calcareous to non-calcareous siltstone and impure limestone Small outcrop of clinopyroxene-megacrystic basalt flow Daphne 64 uKs interbedded with subordinate wacke and minor pebble conglomerate Tertiary dike, inclined, vertical, attitude unknown Point (exposure restricted to the north shore of Quatsino Sound) 27 Dark grey to grey-green, aphanitic to plagioclase-clinopyroxene-phyric tuff-breccia Axis of minor fold, inclined 33 16 26 uTrPvs and lapilli tuff interbedded with thinly bedded to laminated impure limestone, siltstone, 22 25 28 31 22 LOWER CRETACEOUS 17 43 80 Charlie wacke and debris-flow deposits with volcanic and sedimentary clasts including poorly Axial plane of minor fold, inclined 40 consolidated limestone; minor basaltic flows 22 Islands COAL HARBOUR GROUP 17 41 Lineation, inclined (slickenfibres on steeply dipping fault) eek Jenkinson Cr ?Albian 26 7 UPPER TRIASSIC 21 21 Upper sandstone unit: trough cross-laminated lithic wacke intercalated Lineation, horizontal (slickenfibres on steeply dipping fault) River Peel Island lKCsn VANCOUVER GROUP Twin with siltstone, minor pebble conglomerate and rare coal 30 Fossils e 12 Rocks Round 5620000N at 10 Bear Patrician Upper Triassic (Carnian to Lower Norian) TIN qu Island ul Cove Cove Lower conglomerate unit: massive conglomerate with minor lenses Macrofossil locality (fossil age code below; identification by E. T. Tozer) Ts C QUATSINO FORMATION 20 un lKCcg of coarse-grained lithic wacke Jensen nin Cr gh Medium to pale grey, thinly bedded to massive micritic limestone and locally 5620000N Cove e TlC(W) ek am uTrQ Deer bioclastic limestone; minor silica replacement and chert nodules; rare GSC Macrofossil locality (fossil age code below) Cattle Upper Valanginian to Barremian laminated interbeds, oolitic layers and algal structures; locally fossiliferous Islands Island TC 29 Cunningham Conodont locality (fossil age code below; identification by M. J. Orchard) 19 er LONGARM FORMATION EQUIVALENTS Riv Lake Eagle 19 Upper Triassic (Carnian; possibly Middle Triassic (Ladinian) at the base) TeN 17 Shell Island Greenish to brownish grey, thinly bedded to massive sandstone, siltstone, GSC Conodont locality (fossil age code below; identification by 28 lKL Island mudstone, pebble conglomerate and minor coal; locally fossiliferous KARMUTSEN FORMATION M. J. Orchard) ate lqu 69 su Upper Karmutsen Formation: Flow Member J T 20 GSC Radiolarian locality (fossil age code below; identification by 18 45 18 UPPER TRIASSIC TO MIDDLE JURASSIC Dark grey-green, aphanitic to plagioclase-phyric basalt flows, commonly F. Cordey) Thomas uTruKf Point BONANZA GROUP - NORTH OF HOLBERG FAULT amygdaloidal and locally exhibiting laminar flow features (vesicle trains) and pipe vesicles; may include minor pillow lava and hyaloclastite Fossil age designation 35 31 60 W Lower (?Hettangian) to Middle (Bajocian) Jurassic 33 30 76 a T Late Triassic; J Jurassic; K Cretaceous 17 86 Boyden h 17 HOLBERG VOLCANIC UNIT Small outcrop of plagioclase-megacrystic (1-2cm) basalt flow; commonly r - 45 w 48 e 25 v e amygdaloidal and locally exhibiting trachytoid texture; intercalated with e early; m middle; l late i 10 s 34 53 e Poorly exposed, undivided basaltic to rhyolitic flows, volcaniclastic and R aphanitic or plagioclase-phyric basalt near the top of the succession 37 34 32 lmJH sedimentary rocks east of Rupert Inlet Late Triassic: C Carnian; N Norian; R Rhaetian 36 20 Glenlion 45 44 Dark grey-green, closely packed, pillowed basalt flows; aphanitic Jurassic: S Sinemurian; P Pliensbachian 16 16 uTruKp reek and variably amygdaloidal C 50 C Mainly dark grey-green to medium grey, basaltic to andesitic flows and oth 14 Malcolm A Aalenian Bo r oth e mJHm volcaniclastic rocks including plagioclase-hornblende-phyric andesite, 34 C Bo 26 e Point k ick r plagioclase-clinopyroxene-phyric basalt-andesite with sparse hornblende Cretaceous: H Hauterivian; B Barremian D e Bere 36 e k k megacrysts (~1cm), tuff-breccia, lapilli tuff and reworked equivalents; minor ic Creek Point uTruKpx Plagioclase-megacrystic (<2cm) pillowed basalt flows D 15 Ammonite Zone: (K) Kerri; (C) Cordilleranus; 15 31 15 sedimentary rocks including volcanic breccia, wacke, siltstone, mudstone Black and shale; locally may include minor rhyolitic flows and tuffs Conodont Zone: (P) Primitius 30 Bluff Pale to medium grey, micritic to rarely bioclastic or oolitic limestone (no label indicates age indeterminate; Medium grey to grey-green, aphanitic to feldspar-phyric, rhyolitic to dacitic uTruKls intercalated with basalt near the top of the flow succession mJHf flows, flow domes and/or pyroclastic rocks including flow and pyroclastic combined codes indicate age/zone range) 14 14 breccia, welded to non-welded crystal-lithic lapilli tuff with carbonized wood fragments; may locally include thin interbedded volcanic breccia and wacke, Geochronology 51 39 83 False 166.9 (±0.5) Zr Head and minor basaltic to andesitic flows Thin (0.5-5m) beds and lenses of inter-volcanic limestone of unit uTruKls 55 U-Pb zircon