L E.G:EN'D This legend is common to maps 1635A, 1636A, 1637A, 1638A, coloured legend blocks indicate map units that appear on this map OVERLAP ASSEMBLAGES Til Lamprophyre | m Dt =I > J x JURASSIC AND CRETACEOUS JKLR LITTLE RIVER STOCK: granodiorite and quartz monzonite PERMIAN OR YOUNGER Quartz porphyry rhyolite QUESNEL TERRANE TRIASSIC AND JURASSIC NORIAN AND (?) YOUNGER QUESNEL RIVER GROUP (uTa,-kub) tJb Augite porphyry basalt breccia, minor flows, tuff and tuffaceous J argillite; local andesitic basalt Basaltic tuff and breccia, generally fine grained; argillite, Wa flows, chert UPPER TRIASSIC KARNIAN AND (?) NORIAN Phyllite, argillite, slaty argillite, quartzite, schist, minor greenstone (subgreenschist to amphibolite (kyanite) facies of metamorphism); uka,g, conglomerate Undivided uka, and greenstone, augite-porphyry breccia, tuff breccia, tuff; possible dykes and sills (subgreenschist and greenschist facies of metamorphism) SLIDE MOUNTAIN TERRANE UPPER PALEOZOIC MISSISSIPPIAN TO PERMIAN SLIDE MOUNTAIN GROUP (PMub-uPA) ANTLER FORMATION: pillow basalt, breccia, diorite, chert, greywacke, (minor limestone?); uPAu , serpentinite; uPAS , chert, minor basalt and diorite a A » i) ow —_ CROOKED AMPHIBOLITE: undifferentiated; uPCu , serpentinite and sheared ultramafic rock; uPct , talcose altered ultramafic rock; uPca , amphibolite PALEOZOIC OR MESOZOIC Serpentinite and peridotite (as mapped by Campbell, 1978) BARKERVILLE TERRANE LOWER PERMIAN Sugar limestone: grey crinoidal limestone, minor grey chert UPPER PALEOZOIC? SNOWSHOE GROUP (PB-uPim) ISLAND MOUNTAIN AMPHIBOLITE: amphibolite, minor siliceous mylonite uPSc Orange weathering fuchsite-bearing ankeritic carbonate Hardscrabble Mountain succession: black siltite and phyllite, grey micaceous quartzite, limestone, minor metatuff?; uPHMs , greywacke, muddy conglomerate Bralco succession: marble Foliated diorite and augite porphyry basalt, gabbroic rocks; includes undifferentiated diabase, diorite u > Fe: m Oo N je} re) ~~ > fre; m Oo N Q o QUESNEL LAKE GNEISS 5 (2) = Light grey potassium feldspar porphyritic granitic orthogneiss SNOWSHOE GROUP (HR-PE) Eaglesnest succession: olive and grey micaceous quartzite and phyllite Downey succession: olive and grey micaceous quartzite and phyllite, and undifferentiated rocks; Poa, amphibolite, includes some marble, quartzite and schist; Poc , marble, includes some phyllite, schist, quartzite and amphibolite; Pop, phyllite, schist, metatuff, includes some marble, quartzite and amphibolite; Pov , metatuff, metadiorite, includes some marble, phyllite, schist and amphibolite; (metamorphism ranges from chlorite to kyanite grade) Agnes succession: quartzite clast conglomerate, quartzite, minor limy conglomerate Goose Peak succession: quartzite, minor conglomerate Harveys Ridge succession: dark grey and grey micaceous quartzite, black quartzite and interbedded dark grey phyllite, schist, siltite, and minor micritic limestone and undifferentiated rocks; PHRc, limestone and limestone conglomerate; PHRs , purple grey very micaceous quartzite and black phyllite; PHRv, grey slate and green metatuff, in part calcareous ag U0 > > iw) ie D m % e) Zz N 5 ie) 2 (@) OR PALEOZOIC HPT Tom succession: olive grey micaceous quartzite, phyllite and schist Keithley succession: grey and olive, fine micaceous quartzite and phyllite; minor marble; HkEm , marble, phyllite; HKEp, grey and green phyllite, minor olive quartzite; HKEq, white to dark grey quartzite Kee Khan marble: marble, calcareous sandstone, micaceous quartzite, green and grey phyllite, in part calcareous Tregillus succession: grey and olive-grey micaceous quartzite, phyllite and schist; undifferentiated HTg, conglomerate Ramos succession: olive and olive grey micaceous quarizite, and phyllite, light brown and grey sandstone and undifferentiated rocks; HRs, phyllite, schist, quartzite, calc-silicate rocks, may be partly equivalent to HKE ; HRc, limestone, calcareous quartzite; Hrp, black siltite, phyllite and slate, may be partly equivalent to PHR; HRq, olive and grey slate and micaceous quarizite, may be part of HKE Snowshoe Group undifferentiated: HR to PE, mainly PHR to PE ei S 3 z Z > Zz =) Campbell, R.B. CARIBOO TERRANE PERMIAN AND/OR TRIASSIC Pts Olive and grey greywacke and slate PENNSYLVANIAN Grey fusulinid and pelletoidal limestone MIDDLE PENNSYLVANIAN ALEX ALLAN FORMATION: black micritic limestone, grey and black shale 'U c ORDOVICIAN TO MISSISSIPPIAN MISSISSIPPIAN OR YOUNGER BLACK STUART GROUP (SDss - MBs) Sandstone unit: olive grey micaceous and white quartzite, black and pink chert LOWER MISSISSIPPIAN GREENBERRY FORMATION: crinoidal limestone, chert, dolostone UPPER DEVONIAN AND LOWER MISSISSIPPIAN GUYET FORMATION: muddy and sandy conglomerate and breccia, granule quartzite and slate ry | MIDDLE AND/OR UPPER DEVONIAN WAVERLY FORMATION: schistose, calcareous, basaltic tuff, and volcaniclastics, pillow basalt, minor siltite UPPER ORDOVICIAN AND DEVONIAN TO MISSISSIPPIAN OR YOUNGER Black pelite unit: black slate, argillite and cherty argillite, black limestone, dolostone and silicified limestone (in part amphiporal) UPPER SILURIAN AND LOWER DEVONIAN [=| Chert-carbonate unit: light to dark grey chert breccia, grey limestone matrix, dolostone granule to pebble breccia, limestone matrix, chert-quartz-dolostone conglomerate to breccia CAMBRIAN TO (?) DEVONIAN €DsBs Black Stuart formation (as used by Campbell, 1978) HADRYNIAN AND CAMBRIAN LOWER TO (?) UPPER CAMBRIAN CARIBOO GROUP (HI-€Dc) €DC DOME CREEK FORMATION: dark shale and limy shale LOWER CAMBRIAN MURAL FORMATION: grey limestone, minor shale and argillite HADRYNIAN AND/OR CAMBRIAN MIDAS FORMATION: dark siltstone and quartzite, minor shale and argillite YANKS PEAK FORMATION: grey and white, minor pink and green quartzite, minor siltstone and argillite MIDAS, YANKS PEAK AND YANKEE BELLE FORMATIONS: undivided HADRYNIAN (WINDERMERE) YANKEE BELLE FORMATION: green and grey thin bedded argillite, shale, minor quartzite and limestone; local phyllite and schist CUNNINGHAM FORMATION: grey limestone, minor shale, argillite and dolostone es i?) x > iw) D xX = > Cz ISAAC FORMATION: dark phyllite, calcareous phyllite, slate, argillite, and minor limestone and micaceous quarizite H€cu Cariboo Group undifferentiated: KAZA GROUP Greywacke, argillite, phyllite, schist, minor pebble conglomerate =< Az IGNEOUS ROCKS OF UNKNOWN TERRANE AFFINITY MISSISSIPPIAN OR YOUNGER Diabase, diorite Calc-sillicate rocks (isolated OUtCrOpS) ........- eee eee CS x Geological boundary (defined, approximate, assumed) ........ Goo a SE Bedding, tops known (inclined, overturned) ........--. ++... eee eee Bn BE Bedding, tops unknown (inclined, vertical) .........-. 00000 cceeeeee ae L Bedding parallel to cleavage (inclined, overturned) ................. Phas Cleavage, first generation (horizontal, inclined, vertical) ........ oe IS Cleavage, second generation (inclined, vertical) ..............++.5+5 PRD iS Fault (defined, approximate, assumed) solid circle indicates COWNITHFOW: SIMO yates cece aces sceneries tra aens — on Thrust fault (defined, approximate or assumed) hangingiwalliteethy: 0). k.s se saeco diated ne are Ss Bee uses Pe eo ee Anticline (upright, overturned) arrow indicates plunge ......... —- aie Syncline (upright, overturned) arrow indicates plunge.......... —+— athe FNAL Pets ERI eee DO ACE RO ace OR ROME OO omnia Tao es Oo up aa eae ; : : ; 10 15 SERGE et ees VE Pebble long axis, average trend and plunge ........... 6 eect e vere ees 1 az 1 hot: bed hope ea e er Satis age STR e AO AEE LAD BDA at Ot. YC Dew Om OME Saat FOSSIIMIOCAIIE: <1 cere ca can ge oes ca hat ok Hoga ere eA © Garnet isograd (half moon on higher grade side)............... ae eee oe Border of detailed geology as mapped by Struik, reconnaisance geology beyond the border is from the McBride map area (Campbell, Mountjoy and Young, 1973) and the Quesnel Lake map area (CAMDEN VOTE) raster scone rer seeharetena nak coer srs csdecey a pedese os Sikes femone 1978: Quesnel Lake (93A) map area; Geological Survey of Canada, Open File 574. Campbell, R.B., Mountjoy, E.W., and Young, F.G. 1973: Geology of McBride map area, British Colombia; Geological Survey of Canada, Paper 72-35 Recommended citation: Struik, L.C. 1988: Geology, Spectacle Lakes, Cariboo Land District, British Columbia; Geological Survey of Canada, Map 1636A, scale 1:50 000 ivi Canada Bee Energy, Mines and Energie, Mines et Resources Canada Ressources Canada Geological Survey Commission géologique of Canada du Canada 121°30' 53°15" Bowron Lake 2km hs: 10’ Barkerville 13 km Bowron Lake 19 km Barkerville 3 km 05" Barkerville 2km 53°00’; 121°30’ 05' 121°00' 25' | Kiethley Creek 44 km 20' 53°15' 05’ 53°00’ 121°00' Copies of this map may be obtained from the Geological Survey of Canada: 601 Booth Street, Ottawa, Ontario K1A 0E8 3303-33rd Street, N.W., Calgary, Alberta T2L 2A7 100 West Pender Street, Vancouver, B.C. V6B 1R8 INDEX MAP Geology by L.C. Struik, 1977-1982 Geological cartography by P.P. Hermann, Geological Survey of Canada Any revisions or additional geological information known to the user would be welcomed by the Geological Survey of Canada Base map at the same scale published by the Surveys and Mapping Branch in 1981. Roads were revised by the Geological Survey of Canada for this edition MAP 1636A GEOLOGY SPECTACLE LAKES CARIBOO LAND DISTRICT BRITISH COLUMBIA Scale 1:50 000 - Echelle 1/50 000 Kilometres 1 0 1 2 3 4 Kilométres ———_— ————— OO Universal Transverse Mercator Projection Projection transverse universelle de Mercator © Crown Copyrights reserved © Droits de la Couronne réservés Ae NO! Itt VANCOUVER DISTRICT LIBRARY Copies of the topographical editions covering this map area may be obtained from the Canada Map Office, Department of Energy, Mines and Resources, Ottawa, Ontario K1A 0E9 Approximate magnetic declination 1986, 23°05’ East, decreasing 15.1’ annually Elevations in feet above mean sea level Printed by the Surveys and Mapping Branch. Published 1988 93 H/5 93 H/6 NATIONAL TOPOGRAPHIC SYSTEM REFERENCE AND INDEX TO ADJOINING GEOLOGICAL SURVEY OF CANADA MAPS SPECTACLE LAKES CARIBOO LAND DISTRICT BRITISH COLUMBIA NORTH VANCOUVER DISTRICT LIBRARY