BC Ministry of Energy, Mines and Petroleum Resources
Geological Survey Branch
Open File 1994-7
Geological compilation of the Cariboo - Chilcotin area, south-central British Columbia
NTS 92J,K,N,O,P; 93A,B,C,F,G,H
Geology compiled by P. Schiarizza, A. Panteleyev,
 R.G. Gaba and J.K. Glover





Legend   Cariboo-Chilcotin Area

Tertiary and Quaternary Assemblages
QUATERNARY
HOLOCENE (MAY INCLUDE SOME PLEISTOCENE)
Rv
Basalt and basalt breccia; basalt cinder cones and related flows

Pleistocene and Holocene
Qal
Unconsolidated glacial, fluvial and alluvial deposits; talus; volcanic ash

Pleistocene
Pv
Alkali olivine basalt flows, hyaloclastite and breccia

TERTIARY and quaternary
PLIOCENE TO Holocene
Garibaldi Group
TQG
Basalt to rhyodacite flows and pyroclastics; minor intercalated sediments

Pliocene and/or PLEISTOCENE
PPv
Vesicular basalt, basalt breccia, basalt cinder cones

MIOCENE to PLEISTOCENE
aNAHIM vOLCANICS (MPav and MPavc)
MPav
Basalt, trachyte and rhyolite, with minor subvolcanic intrusive equivalents

MPavc
Ash and breccia beds interlayered with MPav

Chilcotin Group (MPCv and MPCs)
MPCv
Olivine basalt; minor andesite, tuff, breccia, conglomerate, sandstone, siltstone, shale and diatomite

MPCs
Unconsolidated fluviatile conglomerate, sandstone and siltstone; minor rhyolite ash, diatomaceous earth, olivine basalt and breccia


Tertiary
MIOCENE (?)
Mb
Basalt and andesite flows; related breccia and tuff; minor dacite, conglomerate and siltstone

OLIGOCENE TO PLIOCENE
OPs
Poorly consolidated to unconsolidated conglomerate, sandstone and mudstone; minor diatomite, lignite, basalt

Eocene and/or Oligocene
Endako Group (EOEv and EOEs)
EOEv
Basalt, andesite; related tuff and breccia; minor dacite, rhyolite, conglomerate, sandstone and shale

EOEs
Conglomerate, sandstone, shale, lignite; minor breccia, tuff and basalt

EOv
Picritic and pyroxene-phyric basalt; andesite, andesitic to basaltic tuff and breccia; quartz-phyric rhyolite flows and welded tuff

EOCENE
Ecg
Volcanic pebble to cobble conglomerate; minor sandstone

Ev
Andesitic, dacitic and rhyolitic breccias, tuffs and flows; lesser conglomerate, sandstone, siltstone and shale; minor basalt

Ootsa Lake Group
EOL
Rhyolite, dacite, trachyte; related tuff and breccia; andesite and basalt; minor conglomerate, greywacke and tuffaceous shale

Kamloops Group (EKv and EKs)
EKv
Andesite, trachyandesite, trachyte and latite flows, breccias and tuffs; includes Skull Hill Formation

EKs
Shale, siltstone and sandstone; some tuffaceous units

PALEOCENE AND/OR EOCENE
PEv
Intermediate to felsic volcanic flows, tuffs and breccias; conglomerate, sandstone, siltstone, tuffaceous shale and mudstone; basalt flows and flow breccia

Paleozoic-Mesozoic Assemblages of the Coast Belt
Metamorphic Rocks of Uncertain Correlation
AGE UNKNOWN
ms
Micaceous quartzite, biotite-hornblende schist, minor garnet and staurolite schist; msm- metasediments and migmatite

mv
Metavolcanic rock

am
Amphibolite

scmv
Schist and metavolcanic rock

ns
Gneiss and schist; nsa- gneiss, schist and amphibolite

sk
Skarn

xn
Granitoid gneiss; migmatite; locally includes amphibolite and schist; xns- siliceous granitoid gneiss; xnd- dioritic granitoid gneiss and/or dioritic complex; xnk- stockwork

Mount Raleigh Belt
LOWER CRETACEOUS
Gambier Group (lKGS to lKG)
lKGS
Styx Formation: metamorphosed greywacke, mudstone, black shale; schist, graphite schist

lKGE
Mount Eurydice Formation: metamorphosed andesitic to dacitic tuff and breccia; conglomerate; lesser schist and feldspar porphyry

lKG
Andesitic to dacitic tuff, breccia, agglomerate; andesite; argillite, conglomerate; lesser marble, greenstone, phyllite, schist

UPPER TRIASSIC(?) AND LOWER JURASSIC(?)
TrJmr
Cleaver Gneiss, Resurrection Schist and Charon Amphibolite: amphibolite, marble, calc-silicate rock, feldspathic schist, gneiss

Atnarko Belt
Lower and/or Upper Cretaceous
luKav
Andesitic breccia, tuff, lahar and feldsparphyric flows

LOWER CRETACEOUS
Aptian to albian
lKav
Rhyolite, dacite and andesite flows; intercalated tuffs and breccias

Hauterivian and(?) Younger
lKMv
Monarch volcanics: andesitic and basaltic breccia and tuff; minor shale, greywacke and conglomerate; lKMs- shale, greywacke and conglomerate


MIDDLE and upper JURASSIC
muJhv
Hotnarko volcanics: andesitic, dacitic and rhyolitic tuffs, breccias and flows; tuffaceous argillite and argillite; minor conglomerate, greywacke and limy argillite

UPPER TRIASSIC AND/OR LOWER JURASSIC
TrJav
Penetratively deformed, predominantly greenschist facies, basaltic to rhyolitic metavolcanic rocks; minor volcanic breccia intercalated with carbonate lenses; may in part be equivalent to the Hazelton Group

Niut Belt
HAUTERIVIAN AND(?) YOUNGER
lKcpv
Purple andesitic pyroclastic rocks and minor flows; purple greywacke and conglomerate

lKcps
Purple greywacke, conglomerate

lKcmv
Rhyolitic to basaltic pyroclastics and flows, volcanic sediments, quartzose sandstone, greywacke, argillite

lKcv
Rhyolitic to basaltic breccias, tuffs and flows; minor shale, siltstone, greywacke and conglomerate

lKcs
Argillite, greywacke and conglomerate; minor volcanic tuff

HAUTERIVIAN
lKcd
Cloud Drifter formation: sandstone, siltstone, shale and conglomerate

Hauterivian(?)
lKot
Ottarasko formation: dacitic to andesitic breccias and minor flows; lesser basalt and rhyolite; minor siltstone and shale

HAUTERIVIAN AND OLDER
imb
Imbricate zone: tectonically interleaved slices of lKcd, lKot, Triassic rocks and orthogneiss

UPPER TRIASSIC
Upper Norian
uTrmo
Mosley formation: volcaniclastic sandstone, siltstone and minor limestone

Lower Norian
uTrs
Tuffaceous shale and lapilli tuff


uTrls
Limestone; lesser limy shale and tuffaceous shale

Upper Carnian and(?) Lower Norian
uTrmm
Mount Moore formation: andesitic to basaltic flows, tuffs and breccias; lesser sandstone, argillite and siltstone; minor limestone

Tyaughton Basin
Upper CRETACEOUS
Powell Creek formation (uKpcu to uKpc)
uKpcu
Well stratified lapilli tuff, volcanic breccia, lahar, volcanic conglomerate and sandstone

uKpcm
Andesitic volcanic breccia, lapilli tuff and ash tuff; mafic to intermediate volcanic flows; volcanic sandstone and conglomerate; uKpcm1- mainly lapilli and ash tuffs, mafic and intermediate flows; uKpcm2- well bedded volcanic sandstone, conglomerate and shale; silicified lapilli tuff; rare andesitic flows; uKpcm3- massive volcanic breccia, lesser volcanic sandstone, conglomerate, lahar, andesitic flows

uKpcbs
Polymictic conglomerate; volcanic conglomerate and breccia; sandstone, siltstone and shale; rare occurrences of welded tuff

uKpc
Undivided mafic to intermediate flows, tuffs and breccias; volcanic sandstone, conglomerate and shale

Lower AND/OR Upper CRETACEOUS
Albian and/or Cenomanian
luKts
Argillite, quartz sandstone, arkose, conglomerate; minor volcanic flows and tuffs; may be equivalent to unit luKsq and/or unit luKTCb

Silverquick formation
luKsq
Pebble to cobble conglomerate containing clasts of chert, volcanic rock and sandstone; lesser amounts of sandstone, siltstone and shale; upper part of formation includes intercalations of volcanic breccia and volcanic conglomerate

LOWER and(?) Upper CRETACEOUS
Taylor Creek Group (luKTCb to luKTC)
ALBIAN and/or cenomanian
luKTCq
Quartzose sandstone, chert pebble conglomerate, argillite, siltstone; rare light green felsic tuff

luKTCb
Beece Creek succession: sandstone, siltstone and shale; pebble conglomerate containing clasts of chert, volcanic rock and clastic sedimentary rock; calcareous sandstone and shale; ash and crystal tuff

ALBIAN
lKTCvs
Intermediate to felsic volcanic flows and tuffs; volcanic breccia and conglomerate; sandstone, siltstone and shale

lKTCv
Intermediate to felsic volcanic flows and tuffs; volcanic breccia and conglomerate; local intercalations of sandstone, siltstone and shale



lKTCl
Lizard formation: Micaceous quartzofeldspathic sandstone and shale; polymict conglomerate, lithic sandstone, conglomeratic sandstone; volcanic conglomerate; volcanic breccia and tuff

lKTCd
Dash formation: Chert-pebble conglomerate; chert-rich sandstone; shale and siltstone

Albian and(?) older
lKTCp
Paradise formation: Shale and sandstone; pebble to cobble conglomerate containing volcanic clasts and less abundant sedimentary and plutonic clasts

lKTCe
Elbow Pass formation: Sandstone, shale, and pebble conglomerate containing intermediate and mafic volcanic clasts

luKTC
Undivided lKTCe, lKTCl, lKTCv and luKTCb

lower cretaceous
Hauterivian(?) and/or younger
lKtvs
Tosh Creek succession: volcanic conglomerate and breccia; dark grey shale with intercalations of siltstone and sandstone; mafic to intermediate volcanic rocks

MIDDLE JURASSIC TO LOWER CRETACEOUS
Relay Mountain Group (muJRM1 to lKRM3)
Hauterivian to Barremian
lKRM3
Dark grey shale and siltstone; sandstone and calcareous sandstone

Upper Oxfordian to Valanginian
JKRM2
Sandstone and siltstone; calcareous sandstone, coquina; conglomerate and conglomeratic sandstone containing mainly volcanic and plutonic clasts

Callovian to Lower Oxfordian
muJRM1
Siliceous shale, siltstone and fine grained sandstone; medium to coarse grained sandstone, calcareous sandstone, and calcareous siltstone; pebble conglomerate containing mainly felsic to intermediate volcanic clasts

Bridge river Terrane
MISSISSIPPIAN TO MIDDLE JURASSIC
Bridge River Complex
MJBR
Undivided ribbon chert, argillite, phyllite, quartz phyllite and pillowed to massive greenstone, with lesser amounts of limestone, gabbro, diabase, sandstone, pebble conglomerate and serpentinite; locally includes fault slivers of Taylor Creek Group rocks


Cadwallader Terrane
LOWER TO MIDDLE JURASSIC
Sinemurian to Callovian
lmJhm
Huckleberry Mountain formation: shale, siliceous argillite and siltstone; lesser sandstone and conglomerate; minor micritic limestone

Hettangian to Bajocian
lmJlc
Last Creek formation: calcareous siltstone, sandstone and conglomerate; calcareous shale

Upper TRIASSIC OR JURASSIC
TrJne
Noel Mountain east succession: siliceous argillite and siltstone; lesser sandstone, conglomerate and limestone

UPPER TRIASSIC
MIDDLE(?) AND UPPER NORIAN
Tyaughton Group
uTrT
Conglomerate, conglomeratic sandstone and sandstone; limestone and limestone conglomerate; siltstone, calcareous sandstone and coquina

Lower to upper Norian
Cadwallader Group
uTrCH
Hurley Formation: sandstone, calcarenite and siltstone; polymict conglomerate, pebbly mudstone, limestone-greenstone breccia and micritic limestone; local intercalations of of greenstone, mafic volcanic breccia and mafic tuff; uTrCHy- imbricated Hurley Formation and Bralorne-East Liza Complex within the Yalakom fault zone

Ophiolitic Assemblages
PERMIAN
Bralorne-East Liza complex
PBEL
Gabbro, diorite, quartz diorite, soda granite, diabase, serpentinite, pillowed to massive greenstone and greenstone breccia; minor amounts of limestone and chert


PERMIAN(?)
Shulaps Ultramafic Complex (PSm and PSh)
PSM
Serpentinite Melange unit: serpentinite derived from olivine-clinopyroxene ultramafite (locally metamorphosed to olivine-talc-serpentine and olivine-talc-magnesite schists, or altered to listwanite), with knockers of ultramafic rock, gabbro, diorite, diabase, amphibolite, greenstone, rodingite, chert, phyllite, sandstone, conglomerate and limestone

PSH
Harzburgite unit: harzburgite, with lesser amounts of dunite and orthopyroxenite (variably serpentinized); locally with a penetrative foliation and lineation inferred to be a mantle tectonite fabric


PALEOZOIC AND/OR MESOZOIC

PMs
serpentinite, serpentinized ultramafite and quartz-carbonate-mariposite-altered rocks (listwanite); PMsf- undivided serpentinite, listwanite, and fault slivers of mainly MJBR and luKsq

methow terrane/Basin
UPPER CRETACEOUS(?)
uKys
Arkose, greywacke, shale and minor conglomerate

LOWER CRETACEOUS
Jackass Mountain Group (lKJMc to lKJMy2)
Albian
lKJMy2
Arkosic sandstone, conglomeratic sandstone, siltstone, shale and conglomerate; lKJMy2s- fossiliferous black shale

lKJMc2
Polymict pebble to boulder conglomerate containing mainly granitoid and volcanic clasts; lesser amounts of sandstone, conglomeratic sandstone, siltstone and shale

Albian and/or Older
lKJM
Greywacke, siltstone and conglomerate (may be equivalent to lKJMy2)

Aptian and(?) older
lKJMc1
Lithic sandstone, conglomeratic sandstone and pebble conglomerate containing mainly volcanic clasts; lesser amounts of siltstone and shale; abundant fossil plant remains

Barremian-Aptian
lKJMy1
Lithic sandstone, granule conglomerate and conglomeratic sandstone; lesser amounts of siltstone and shale; very minor amounts of laminated silty limestone

Hauterivian to Albian (?)
lKJMc
Sandstone, siltstone, shale and polymict conglomerate (in part equivalent to units lKJMc1 and lKJMc2)

Hauterivian
lKcf
Fish Lake Creek succession: andesite and tuffaceous sandstone; minor rhyolite, pebbly sandstone and argillite

UPPER JURASSIC TO LOWER CRETACEOUS
BERRIASIAN TO BARREMIAN
lKps
Arkose, pebble conglomerate, greywacke, siltstone, coquinoid limestone


OXFORDIAN TO BERRIASIAN
JKps
Siltstone, sandstone and conglomerate

KIMMERIDGIAN OR TITHONIAN
uJcg
Conglomerate, shale, arkose, greywacke and tuff

Middle JURASSIC(?)
Jyv
Medium to dark grey-green volcanic breccia; andesitic flows; volcanic conglomerate

MIDDLE JURASSIC
BAJOCIAN
mJcs
Grey siltstone and fine-grained sandstone

LOWER(?) TO MIDDLE JURASSIC
TOARCIAN(?) TO BAJOCIAN
lmJys
Lithic-arkosic sandstone intercalated with lesser amounts of granule to small pebble conglomerate, siltstone and shale; thin-bedded siltstone and laminated shale

JURASSIC AND(?) LOWER CRETACEOUS
JKy
Undivided lmJys and lKJMy1: lithic-arkosic sandstone, granule to small pebble conglomerate, siltstone and shale; minor andesitic breccia and tuff

Proterozoic-Mesozoic Assemblages of the
Intermontane and Omineca Belts
Dean River metamorphic Belt
AGE UNKNOWN
JTmc
undifferentiated quartz-biotite gneiss, diorite, gneissic granodiorite, amphibolite, migmatite, chlorite schist; minor granite, quartz monzonite and porphyry dikes

Tatla Lake Metamorphic Complex
Ductilely Sheared Assemblage
EOCENE
Eelt
Eagle Lake tonalite: foliated to mylonitic biotite tonalite


JURASSIC AND/or CRETACEOUS
JKmo
Biotite tonalite to granodiorite augen gneiss; hornblende-biotite quartz diorite to tonalite augen gneiss


Jog4
Biotite-muscovite tonalite to granodiorite augen gneiss

JURASSIC(?)
Jms
Foliated to mylonitic metasedimentary rocks; Jmsq- Quartzofeldspathic schist, minor amphibolite; Jmsp- Pelitic schist, minor amphibolite

tam
Amphibolite

Jmv
Chlorite-actinolite-quartz-albite schist; Jmva- hornblende-quartz-oligoclase schist

Gneissic Core
LATE CRETACEOUS
LKoet
One Eye tonalite: nonfoliated to weakly foliated biotite-hornblende tonalite

CRETACEOUS AND(?) OLDER
Kgg
Medium to coarse grained hornblende-biotite granoblastic gneiss; fine grained granoblastic gneiss

Kmg
Migmatitic gneiss

Stikine Terrane
UPPER CRETACEOUS
uKsr
Rhyolite sills, dikes, flows and tuffs

LOWER AND/OR UPPER CRETACEOUS
luKsv
Basalt, andesite, and related tuffs and breccias; minor rhyolite, argillite, arkose and conglomerate

LOWER CRETACEOUS
Skeena Group
lKS
Chert pebble conglomerate, shale, greywacke; minor andesite, breccia and tuff

upper Jurassic and/or younger
JKsv
Andesitic to dacitic tuffs and breccias; minor shale


MIDDLE JURASSIC
Bowser Lake Group
mJA
Ashman Formation: Interbedded argillite and siltstone; minor greywacke

Lower To MIDDLE JURASSIC
Hazelton Group
lmJH
Andesite, basalt and related tuff and breccia; lesser dacitic to rhyolitic tuffs, breccias and flows; conglomerate, greywacke, shale; argillite, tuffaceous argillite, limy argillite; limestone; lmJHs- volcaniclastic siltstone

UPPER TRIASSIC AND LOWER JURASSIC
Takla Group
TrJT
Andesite, basalt, breccia, tuff; minor argillite and limestone

UPPER TRIASSIC
uTrsc
Limestone

Churn Creek - Taseko River Belt
CRETACEOUS AND/OR TERTIARY
KTv
Andesitic to dacitic breccias, tuffs and flows

Upper Cretaceous
uKccv
Intermediate to felsic flows and breccias

Lower and/or Upper CRETACEOUS
Albian and/or Cenomanian
luKccs
Well stratified chert and volcanic-clast conglomerates; sandstone, siltstone and mudstone; volcanic breccia and lahar; volcanic-plutonic-clast conglomerate

luKccv
Andesitic to dacitic volcanic breccia and lapilli tuff; volcanic sandstone and conglomerate; minor andesitic to dacitic flows

LOWER CRETACEOUS
Albian
Spences Bridge Group
lKSB
Andesite and dacite flows and breccias; minor basalt and rhyolite; lKSBS- Spius Formation, amygdaloidal andesite


JURASSIC AND/OR CRETACEOUS (?)
JKv
Andesite beccia, tuffs and flows; dacite; welded tuff; minor quartz-phyric rhyolite, argillaceous tuff and sedimentary rocks; probably mainly equivalent to unit lKSB, but may include older and/or younger rocks


JKmv
Felsic to mafic metavolcanic schist and gneiss (greenschist to amphibolite facies)

Bald Mountain Belt
MIDDLE TO UPPER JURASSIC
mJbcg
Volcanic conglomerate and quartz-bearing feldspathic sandstone

LOWER JURASSIC
lJbs
Siltstone with thin sandstone laminae; minor limestone

MIDDLE TO UPPER TRIASSIC
uTrbs
Siltstone; minor calcareous sandstone

uTrbsv
Interbedded shale, greywacke and andesitic to basaltic volcanics

uTrbc
Nonbedded micritic limestone; minor pebble conglomerate, shale

LATE PERMIAN
lPFqm
Farwell pluton: leucoquartz monzonite, quartz monzonite, granodiorite

PERMIAN(?)
PFdi
Farwell pluton: chloritized and locally foliated metadiorite and quartz metadiorite

UPPER PERMIAN
uPbv
Quartz-feldspar-phyric dacite and rhyolite flows and tuffs; minor green metabasalt flows

MISSISSIPPIAN AND PENNSYLVANIAN
MPbv
Greenstone; minor limestone lenses

AGE UNKNOWN
bsm
Serpentinite containing tectonic blocks of other rock types


Cache Creek Terrane
Cretaceous
Kcs
Chert-grain sandstone and conglomerate; minor shale

LOWER and/or middle JURASSIC (?)
lmJdcg
Polymict conglomerate; minor sandstone, siltstone, limestone

lmJds
Siltstone, shale, greywacke, polymict conglomerate; minor limestone and andesite; locally includes Cretaceous conglomerate, sandstone and carbonaceous shale

Early Jurassic
Granite Mountain batholitH (EJGMlq to EJGMd)
EJGMlq
Granite Mountain phase: leucocratic quartz diorite

EJGMqd
Mine phase and northern border phase: quartz diorite

EJGMd
Southern border phase: diorite

PErmian TO Jurassic (?)
PJog
Granodioritic orthogneiss

PErmian TO TRIASSIC
Cache Creek Complex (PTrCC to PTrCCM)
PTrCC
Undivided phyllite, siliceous phyllite, ribbon and massive chert, argillite, tuff, mafic volcanic rocks, serpentinite, limestone, sandstone, conglomerate (may locally include Jurassic argillite, siliceous argillite and volcaniclastic sandstone correlative with unit lmJds)

PTrCCv
Mafic volcanic breccia and flows; greenstone; minor limestone, argillite and chert

PTrCCt
Ribbon chert, argillite, phyllite, siliceous phyllite; lesser greenstone, limestone and serpentinite

PCCp
Red siliceous phyllite and siltstone

PTrCCl
Limestone; minor greenstone, chert and argillite


PTrCCu
Peridotite, serpentinite, silica-carbonate-altered ultramafite; minor greenstone, gabbro, conglomerate and greywacke

PTrCCM
Marble Canyon Formation: limestone, marble; minor shale, chert and argillite


QUESNEL TERRANE
Lower to Middle Jurassic
lmJqs
Polymict conglomerate, sandstone, shale; may be equivalent to units lmJds and lmJdcg

early jurassic
EJsy
Syenite, monzonite, monzodiorite, syenodiorite  and diorite; minor nepheline syenite, clinopyroxenite, peridotite and gabbro

Late TRIASSIC to early JURASSIC
TrJgd
Takomkane and Thuya batholiths and related plutonic rocks: granodiorite, some diorite, quartz monzonite and granite; locally syenite and syenodiorite (TrJsd)

TrJsd
Syenite, syenodiorite, diorite; minor hornblendite and syenogabbro; may include some TrJgd

TrJsy
Syenite and monzonite

Nicola Group (lJNs to muTrNs)
lower jurassic
lJNs
Feldspathic sandstone and siltstone; minor limestone and calcareous siltstone; includes minor lJNv and possibly some uTrNv

lJNv
Polymict volcanic breccia containing clasts of latite, trachyte and intrusive equivalents; basalt flows and breccias; some felsic volcanic breccias and flows

Upper Triassic and/or LOWER JURASSIC
TrJNv
Augite-phyric and aphyric basalt breccias, tuffs and flows; tuffaceous argillite and siltite; conglomerate, sandstone, siltstone; local andesitic basalt

UPPER TRIASSIC
uTrNv
Pyroxene and pyroxene-hornblende basalt flows, breccias and tuffs; minor sandstone, siltstone, limestone and limestone breccia

MIDDLE TO UPPER TRIASSIC
muTrNs
Sandstone, siltstone, shale; slate and phyllite; bioclastic limestone; minor felsic tuff, tuffaceous argillite, basalt breccia and agglomerate

LOWER CAMBRIAN
lCl
Limestone; may be part of the basement to Quesnel terrane or a fault-bounded portion of Kootenay or Cariboo terrane


Slide Mountain Terrane
Upper Paleozoic
uPCA
Crooked Amphibolite: serpentinite, sheared ultramafic rock, amphibolite, talc schist

uPbr
Black Riders mafic-ultramafic complex: serpentinite, peridotite, pyroxenite, gabbro, amphibolite

MISSISSIPPIAN TO PERMIAN
uPA
Antler Formation: pillowed basalt, basalt breccia, gabbro, diorite, argillite and chert; minor serpentinite and ultramafic rocks

Devonian to Permian
uPF
Fennell assemblage: pillowed and massive basalt, diabase, gabbro, chert and argillite; minor basalt breccia, tuff, sandstone and conglomerate

KOOTENAY TERRANE - Barkerville Belt
MISSISSIPPIAN OR YOUNGER
LPd
Diorite, diabase; minor pegmatite

DEVONIAN AND MISSISSIPPIAN
DMgn
Quesnel Lake gneiss: megacrystic granodiorite to granite augen orthogneiss

Snowshoe Group (PS to HPSa)
Paleozoic
PS
Micaceous quartzite, quartzite, phyllite, slate and schist; lesser siltite, limestone and limestone or quartzite-clast conglomerate; minor amphibolite, metatuff, marble and diabase; includes Harvey's Ridge, Goose Peak, Agnes, Downey, Eaglenest, Hardscrabble Mountain and Island Mountain successions; also includes Permian Sugar Limestone which overlies the Snowshoe Group

PSm
Bralco succession: marble

HADRYNIAN and(?) PALEOZOIC
HPS
Schist, gneiss, schistose quartzite, phyllite, marble, amphibolite and siltite; minor quartzite and quartzite-clast conglomerate; includes Ramos, Tregillus, Keithley, Tom and Kee Khan successions

HPSa
Orthoquartzite, schistose quartzite, schist and phyllite


CARIBOO TERRANE
Cambrian to MISSIssipPIAN
BLACK STUART GROUP
lmPBS
Chert, limestone, dolostone and derived conglomerate and breccia; black shale, argillite, cherty argillite, quartzite, siltite and slate; some pillow basalt, schistose caclareous basaltic tuff and volcaniclstics; includes Waverly, Guyet and Greenberry formations

CARIBOO GROUP (CYM and HICY)
CAMBRIAN
CYM
Yanks Peak, Midas, Mural and Dome Creek formations: quartzite, siltstone, shale, argillite, slate, limestone, dolostone, marble

HICY
Isaac, Cunningham and Yankee Belle formaions: argillite, shale and slate; locally phyllite and schist; minor limestone, dolostone, micaceous quartzite and marble

KAZA GROUP
Hadrynian
HK
Phyllite, greywacke, argillite, schist and micaceous feldspathic quartzite; minor pebble conglomerate and limestone

Intrusive Rocks
TERTIARY
MIOCENE
Mqm
Quartz monzonite; minor granite

OLIGOCENE
Op
Hornblende porphyry

EOCENE
Ep
Hornblende-biotite-quartz-feldspar porphyry, hornblende-feldspar porphyry, quartz-feldspar porphyry


Egd
Quartz monzonite and granodiorite

Et
Muscovite-biotite tonalite

PALEOCENE AND/OR EOCENE
PEp
Hornblende-biotite-quartz-feldspar porphyry, biotite-feldspar porphyry, quartz diorite


TERTIARY (?)
Trp
Rusty, rhyolitic feldspar-quartz porphyry dike swarm

Tib
Intrusion breccia containing clasts of feldspar porphyry, quartz porphyry and foliated quartz diorite

Tqm
Biotite quartz monzonite; biotite granite

TTgd
Tiedemann Pluton: granodiorite, tonalite; lesser quartz diorite

Tgd
Granodiorite, quartz diorite, quartz monzonite

Tgb
gabbro

LATE Cretaceous and/or EARLY Tertiary
KTqp
Quartz eye felsite; quartz-feldspar porphyry

KTqfp
Quartz-feldspar porphyry

KTqhp
Quartz-hornblende-feldspar porphyry

KTf
Feldspar porphyry, biotite-feldspar porphyry


KTp
Hornblende-feldspar porphyry, hornblende-biotite-feldspar porphyry, feldspar porphyry and felsite; locally grading to diorite and quartz diorite

KTpg
Pegmatite

KTg
Granite, granodiorite, tonalite

KTqm
Quartz monzonite

KTgd
Granodiorite, tonalite, quartz diorite; KTgda- aplitic granodiorite

KTqd
Quartz diorite, granodiorite, tonalite

KTtn
Tonalite, quartz diorite, granodiorite

KTd
Diorite, minor gabbro

Cretaceous
KNg
Naver pluton and associated satellitic bodies: granite, quartz monzonite, monzonite, granodiorite; minor aplite and pegmatite

Kqm
Quartz monzonite, granodiorite, granite, quartz diorite; minor aplite, pegmatite, monzonite, syenite; may include Jurassic and/or Tertiary plutons

late CRETACEOUS
LKqm
Quartz monzonite to granodiorite


LKgd
Granodiorite


LKqd
Quartz diorite; lesser granodiorite

LKog
Tonalitic orthogneiss

LKd
Diorite

Mid-Cretaceous
MKgd
Granodiorite

MKqd
Quartz diorite

MKt
Tonalite

Early Cretaceous
EKqd
Quartz diorite

EKAg
Mount Alex plutonic complex: hornblende monzogranite and granodiorite

EKAt
Mount Alex plutonic complex: hornblende leucotonalite, granodiorite

EKAqd
Mount Alex plutonic complex: weakly to strongly foliated, chloritized hornblende quartz monzo-diorite, quartz diorite and diorite

EKPd
Piltz Peak diorite: weakly to strongly foliated hornblende diorite

JURASSIC AND/OR CRETACEOUS
JKPt
Piltz Peak and Mount Wales tonalites: weakly to strongly foliated tonalite

JKp
Quartz porphyry, quartz-biotite-feldspar porphyry, diorite

JKqm
Quartz monzonite, granodiorite, diorite

JKgd
Granodiorite, diorite and quartz diorite; variably foliated

JKt
Biotite-hornblende tonalite, granodiorite

JKqd
Quartz diorite, granodiorite, tonalite, diorite; variably foliated, locally mylonitic

JKdi
Chloritized hornblende diorite and quartz diorite

Late Jurassic
LJg
Granite, granodiorite

LJqd
Quartz diorite

LJHtn
Homathko Peak Tonalite: tonalite to quartz diorite, unfoliated to weakly foliated

Middle JURASSIC
MJqm
Saint Marie pluton: quartz monzonite, granodiorite and granite

MJgd
Granodiorite

MJd
Heterogeneous hornblende diorite and biotite-hornblende granodiorite

Jurassic(?)
Jgd
Granodiorite, diorite

Jqd
Quartz diorite

AGE UNKNOWN
ggd
Granite and granodiorite


gd
Granodiorite; gdtn- granodiorite and tonalite; gdtq- granodiorite, tonalite and quartz diorite

tn
Tonalite; tnqd- tonalite and quartz diorite

qd
Quartz diorite; qdtn- quartz diorite and tonalite; qddi- quartz diorite and diorite; qmd- quartz monzodiorite

di
Diorite; diqd- diorite and quartz diorite

gb
Gabbro


