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Ministry of Energy Mines and Responsible for Core Review

083D,C Geological Legend

 

Canoe River and Brazeau

CARIBOO AND MONASHEE MOUNTAINS

QUATERNARY
     HOLOCENE

Qs

Undifferentiated unconsolidated sand, silt, clay or gravel

Qhv

Basalt: c, cone; f, flow
     PLEISTOCENE

Qpv

Basalt: Qpv1, CLEARWATER UNIT; Qpv2, WELLS GRAY UNIT; h hyaloclastite; f, flow
TERTIARY
     MIOCENE

Tm

Lacustrine silt and clay
CAMBRIAN(?)
C(?)m Foliated white and grey, micaceous, locally graphitic talc- and tremolite-bearing marble and minor pelitic schist found in southern Rocky Mountain Trench. Age unknown but presumed to be equivalent to Cambrian limestones of Rocky Mountains
UPPER PROTEROZOIC
WINDERMERE SUPERGROUP
CARIBOO GROUP
Py YANKEE BELLE FORMATION: green and grey shale and siltstone, minor quartzite and limestone
Pc CUNNINGHAM FORMATION: grey limestone, minor shale and siltstone
Pi ISAAC FORMATION: dark phyllite, slate, limy phyllite; locally important limestone and limestone-pebble conglomerate; quartz-pebble conglomerate and grit at base
KAZA GROUP
Pk Undifferentiated upper, middle, or lower Kaza group
Pku UPPER KAZA GROUP: commonly graded and locally cross-bedded quartzofeldspathic metasandstone, grit, and conglomerate; minor green-grey silty phyllite and slate calcareous grit at basal contact withPo
Po OLD FORT POINT FORMATION: triad of upper carbonaceous and pyritic phyllite or slate, middle light to dark grey limy phyllite and thin-bedded marble, and basal green quartz metasiltstone and fine-grained metasandstone with thin (up to 10 cm) contorted cross- laminated calcareous intervals
Pkm MIDDLE KAZA GROUP: commonly graded and locally cross-bedded quartzofeldspathic metasandstone, grit, conglomerate; green-grey silty slate, phyllite, or schist
Pklc LOWER KAZA GROUP CARBONATE UNIT: cycles of quartzofeldspathic grit or metasandstone, phyllite or schist, culminating in clastic grey to brown marble up to 5m in thickness
Pkl LOWER KAZA GROUP: pelitic schist (kyanite-, staurolite-, garnet-, biotite- and muscovite-bearing locally), minor psammite, orthoamphibolite, marble, and calcsilicate rock; diamictite, conglomerate, grit and psammite at base; cross-bedded quartzite and marble locally found beneath basal conglomerate; probably equivalent to Pmlg and Pmlp
Pwb Undifferentiated BASAL WINDERMERE SUPERGROUP (structurally interleaved with orthogneiss of MALTON GNEISS COMPLEX): grit and locally conglomerate or diamictite; locally mylonitic quartzite at base; kyanite-, garnet-, staurolite-, biotite-, and/or muscovite-bearing pelitic phyllite or schist; psammite; and more rarely marble and calc-silicate rocks above coarse clastic section at base
EARLY PROTEROZOIC BASEMENT

Pg

Pgg: GOLD CREEK GNEISS (ca. 2.1 Ga): quartz dioritic orthogneiss in southern Cariboo Mountains; Pgm: MALTON GNEISS COMPLEX: undifferentiated foliated granitic augen orthogneiss (ca. 2 Ga), mafic orthogneiss, and paragneiss in northern Monashee Mountains

KOOTENAY TERRANE

PPzu

Undifferentiated metamotphic rocks of unknown but probably Proterozoic and possibly Paleozoic age in the footwall of the Pleasant Valley Thrust
Ppzuc UPPER CLASTIC UNIT: quartzofeldspathic psammite and grit, pelitic schist (locally kyanite-, sillimanite-, staurolite-, garnet-, biotite-, and/or muscovite-bearing); minor amphibolite and locally significant graphitic phyllite (in valley of North Thompson River in Cariboo Mountains)
PPzm Marble (When between PPzuc and PPzspa, PPzm refers to MAIN MARBLE of Simony et al. (1980) and Raeside and Simony (1983) and MIDDLE MARBLE of Brown, et al. (1978), Pell and Simony (1984), and Sevigny and Simony (1989); when between Pp and PPzspa, PPzm refers to LOWER MARBLE of Simony et al. (1980), Digelet al. (1989), and Sevigny and Simony (1989).) In Cariboo Mountains south of North Thompson River, PPzm is likely to be MAIN/MIDDLE MARBLE.
PPzpa SEMIPELITE-AMPHIBOLITE UNIT: quartzose psammite, quartzofeldspathic psammite and grit, pelitic schist (locally kyanite-, sillimanite-, gamet-, staurolite-, biotite- and/or muscovite--bearing), concordant and discordant amphibolite, and minor marble
Pp LOWER PELITE UNIT: pelitic schist; minor quartzofeldspathic psammite, conglomerate (Ppc) with clasts of marble, calcsilicate rock, quartzite, and granite (ca. 1200 Ma); and concordant and discordant amphibolite. Probably equivalent to upper part of Pkl and Pwb
Plg LOWER GRIT UNIT: quartzofeldspathic psammite and grit, minor pelitic schist and amphibolite. Prominent diamictite--bearing conglomeratic horizon locally present at base. Probably equivalent to lower part of Pkl and Pwb

INTRUSIVE ROCKS

CRETACEOUS-TERTIARY(?)

KT(g)

MURTLE PLUTON: muscovite-biotite granite and quartz monzonite
LATE CRETACEOUS

LKg

BLUE RIVER PLUTON (88 ± 6 Ma): weakly foliated muscovite (rarely biotite) granite
MIDDLE JURASSIC

MJg

HOBSON PLUTON (174 ± 1 Ma): biotite granodiorite, minor homblende-biotite granodiorite, quartz-diorite, and diorite
TRIASSIC
MJg Small foliated stocks, sills, and dykes of granite in northeastern Wells Gray Park; age about 235 Ma
DEVONO-MISSISSIPPIAN
DMg Small foliated bodies of granitic to dioritic rocks; age about 350 Ma

ROCKY MOUNTAINS

QUATERNARY
HOLOCENE

Qs

Undifferentiated unconsolidated sand, silt, clay or gravel
TRIASSIC
SPRAY RIVER GROUP

TRS

SULPHUR MOUNTAIN FORMATION: dark brown silty shale, siltstone, sandstone, minor calcareous sandstone
DEVONIAN TO PERMIAN

PMDu

Undifferentiated FAIRHOLME GROUP; ALEXO,PALLISER, EXSHAW AND BANFF FORMATIONS; RUNDLE and ROCKY MOUNTAIN GROUPS
PERMIAN AND PENNSYLVANIAN

PPrm

ROCKY MOUNTAIN GROUP: light grey cherty sandstone, massive chert, dolomitic sandstone, silty dolomite
MISSISSIPPIAN
Mu Undifferentiated RUNDLE GROUP and BANFF FORMATION
Mr RUNDLE GROUP: grey dolostone, crinoidal limestone, cherty dolostone
Mb BANFF FORMATION: argillaceous limestone, calcareous shale; at base, black, fissile, cherty shale and brown sandstone
DEVONIAN
Du Undifferentiated PALLISER and SASSENACH FORMATIONS: PALLISER (upper unit): massive dolomitic limestone, SASSENACH (lower unit): sandstone, siltstone, silty limestone
FAIRHOLME GROUP (basinal facies)
Df Undifferentiated MOUNT HAWK, PERDRIX and FLUME FORMATIONS: calcareous mudstone, argillaceous limestone, black shale, cherty limestone
CAMBRO-ORDOVICIAN
Cc Undifferentiated Cambrian or Cambro-Ordovician limestone or marble
COsp SURVEY PEAK FORMATION: calcareous shale, micritic limestone, limestone pebble-conglomerate
UPPER CAMBRIAN

Clx

LYNX GROUP: dolostone, siltstone, limestone
MIDDLE CAMBRIAN
Cu Undifferentiated ARCTOMYS, PIKA, ELDON and SNAKE INDIAN FORMATIONS
Car ARCTOMYS FORMATION: red and green shale; dolomitic siltstone, shaly dolostone
Cp PIKA FORMATION: limestone, limestone-pebble conglomerate, oolite, minor shale, dolomite
Cel ELDON FORMATION: limestone, locally dolomitized
Csi SNAKE INDIAN FORMATION (includes Tatei, Chetang. and Hota formations mapped in north-central part of area): alternating units of limestone and calcareous shale, massive limestone at base locally (Hota Formation)
LOWER CAMBRIAN
GOG GROUP
Cg Undifferentiated McNaughton, Mural, and Mahto formations
Cma MAHTO FORMATION: fine-grained quartz sandstone and siltstone
Cmu MURAL FORMATION: limestone and dolostone with interbeds of shale and siltstone
Cmn MCNAUGHTON FORMATION: massive quartz sandstone, siltstone, minor pebble conglomerate and phyllite
UPPER PROTEROZOIC
WINDERMERE SUPERGROUP
Pm Undifferentiated MIETTE GROUP
Pmu UPPER MIETTE GROUP: silty, locally calcaroous argillite and mudstone; sandstone; locally includes carbonate accumulations (BYNG FORMATION)
Pmm MIDDLE MIETTE GROUP (UNDIFFERENTIATED): as for Pmmu and Pmml
Pmmu UPPER MIDDLE MIETTE GROUP: commonly graded and locally cross-bedded quartzofeldspathic metasandstone, granule- and pebble- conglomerate (grit); siltstone; grey-green silty phyllite; phyllite predominant in thrust sheets near Blackman Creek; base on PO locally calcareous sandstone or limestone-clast conglomerate
Po OLD FORT POINT FORMATION: triad of upper dark grey to black carbonaceous phyllite; middle dolomitic and calcarrous siltstone and phyllite; and basal green phyllite, slate, and locally calcareous quartz siltstone
Pmml LOWER MIDDLE MIETTE GROUP: commonly graded and locally cross-bedded quartzofeldspathic metasandstone, granule and pebble-conglomerate (grit), siltstone, grey-green silty phyllite and schist
PmIp LOWER MIETTE GROUP PHYLLITE: dark silty phyllite, minor quartz-pebble conglomerate
PmIg LOWER MIETTE GROUP GRIT: quartzofeldspathic sandstone and minor phyllite
Pwb Undifferentiated BASAL WlNDERMERE SUPERGROUP (overlying basement in hanging wall of Bear Foot thrust): grit and locally conglomerate or diamictite; locally mylonitic quartzite at base; kyanite-, gamet-, staurolite-, biotite-, and/or muscovite-bearing pelitic phyllite or schist; psammite; and more rarely marble and calc-silicate rocks above coarse clastic section at base (Pwbc); may in part be equivalent to PmIg and PmIp
EARLY PROTEROZOIC BASEMENT

Pg

Pgy:YELLOWJACKET GNEISS (ca. 1.87 Ga): foliated and locally crenulated granitic and granodioritic orthogneiss, locally with augen; Pgb: BULLDOG GNEISS: quartzose paragneiss and amphibolitic mafic gneiss intruded by ca. 1.87 Ga granitic augen gneiss, minor amphibolite; Pgmb: MOUNT BLACKMAN GNEISS: amphibolitic mafic gneiss, granitic gneiss; Pgh: HUGH ALLAN GNEISS (ca. 750 Ma): granitic gneiss

Geological Legend and Base is derived from:

Murphy, D.C. (1990): Geological Survey of Canada; Open File 2324, Scale 1:250,000, 1 sheet.

Mountjoy, E.W. and Price, R.A.: Geological Association of Canada, Special Paper No.6 with Map; Scale 1:833,333, 1 sheet.

See  CANOE RIVER AND BRAZEAU (083D,C) Summary Sheet for an overview of the map area and additional regional references.

Positions of all geological contacts are approximate. In the case of an apparent disagreement between an occurrence’s geological location on the map and its stratigraphic setting given in the MINFILE documentation, the latter should be given priority.