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Ministry of Energy Mines and Responsible for Core Review

082LNW Geological Legend

 

QUATERNARY

PLEISTOCENE AND RECENT

Qal

Unconsolidated glacial, fluvial and alluvial deposits

TERTIARY

EOCENE

KAMLOOPS GROUP

EKv

Andesite, basalt, dacite, trachyte flows, breccias and tuffs

EKs

Conglomerate, sandstone, shale; minor coal and tuff

QUESNEL TERRANE

NICOLA GROUP

UPPER TRIASSIC AND(?) LOWER JURASSIC

TrJNv

Augite-phyric basalt to andesite flows, tuffs and breccias

UPPER TRIASSIC

uTrNe

Eastern volcanic facies: mafic breccia and tuff with augite and hornblende-phyric clasts; local intercalated argillite

uTrNs

Shale, argillite, siltstone, phyllite, tuff and calcareous pelite; minor limestone, conglomerate, greenstone and chloritic phyllite

MISSISSIPPIAN TO TRIASSIC

HARPER RANCH AND(?) NICOLA GROUPS

MTrm

Argillite, phyllite, volcanic sandstone, semischist, meta-augite porphyry and chlorite schist; local carbonate

DEVONIAN TO PERMIAN

HARPER RANCH GROUP

DPH

Argillite, cherty argillite, siltstone, volcanic and chert-grain sandstone; chert-pebble conglomerate; volcaniclastic rocks of mafic to felsic composition; minor carbonate

KOOTENAY TERRANE - ADAMS LAKE BELT

EAGLE BAY ASSEMBLAGE (Msc to HPEB)

MISSISSIPPIAN

Msc

Slate Creek unit (EBP): dark grey phyllite and slate with interbedded siltstone, sandstone and grit; lesser amounts of conglomerate, limestone, dolostone, sericite-chlorite-quartz schist, quartzite and metatuff

DEVONIAN

Dog

Granodioritic orthogneiss

Dsb

Skwaam Bay unit (EBA): light grey sericite quartz phyllite, sericite-chlorite-quartz phyllite and fragmental phyllite derived from felsic to intermediate volcanic and volcaniclastic rocks; lesser amounts of dark grey phyllite and siltstone, green chloritic phyllite, sericitic quartzite and pyritic chert (exhalite?); Dsbi - includes abundant orthogneiss of unit Dog

DEVONIAN AND/OR OLDER(?)

Pum

Serpentinite

Pdr

Dixon Ridge unit (EBM): vesicular and pillowed metabasalt, greenstone and chlorite schist; minor amounts of bedded chert, siliceous phyllite and fine-grained quartzite

Pwc

Woolford Creek unit: chlorite-sericite-quartz schist, chlorite schist, actinolite schist and greenstone; may in part be equivalent to unit lPSs

LOWER PALEOZOIC

lPfl

Forest Lake unit (EBS): grey and green phyllitic sandstone and grit, phyllite, chlorite-sericite-quartz schist and quartzite; lesser amounts of dark grey phyllite, limestone, dolostone, conglomerate, green chloritic phyllite, greenstone, pillowed metabasalt, sericite quartz phyllite and feldspathic sericite quartz phyllite (metatuff)

LOWER CAMBRIAN

lCjl

Johnson Lake unit (EBG): calcareous chlorite schist, fragmental schist and greenstone derived largely from mafic to intermediate volcanic and volcaniclastic rocks; lesser amounts of limestone and dolostone; minor amounts of quartzite, grit, grey phyllite, siltstone and polymict conglomerate; lCjls - grey siliceous and/or graphitic phyllite, calcareous phyllite, quartzite, limestone and calcsilicate rock

HADRYNIAN(?) TO PALEOZOIC

HPEB

Undivided quartzite, micaceous quartzite, siliceous phyllite, garnet-mica-quartz schist, greenstone, chloritic phyllite, chlorite schist, limestone, argillite, slate and conglomerate; mainly equivalent to unit lCjl; HPEBc - white crystalline limestone that may be equivalent to the Tshinakin limestone member of unit lCjl

MOUNT IDA ASSEMBLAGE

ORDOVICIAN

Oog

Little Shuswap orthogneiss: leucocratic granite gneiss, quartz monzonite gneiss and granodiorite gneiss; minor diorite gneiss

LOWER PALEOZOIC

IPS

Sicamous Formation: calcareous black phyllite, graphitic phyllite, dark grey limestone, argillaceous and phyllitic limestone; lPSs - variably schistose epidote-actinolite-quartz and garnet epidote skarn; lesser amounts of chloritic schist and sericite quartz schist (Sicamous Formation includes units EBL and EBK of the Eagle Bay assemblage)

IPT

Tsalkom Formation: greenstone and chloritic phyllite; minor amphibolite, black phyllite, limestone, marble, conglomerate and serpentinite

HADRYNIAN AND/OR PALEOZOIC

HPSC

Silver Creek Formation: pelitic and semipelitic schist, quartzite, micaceous quartzite and calcareous quartzite; lesser limestone, marble and amphibolite

SHUSWAP ASSEMBLAGE

PROTEROZOIC AND/OR PALEOZOIC

PPS

Undivided quartzofeldspathic gneiss, biotite quartz schist (commonly with sillimanite, kyanite, garnet or staurolite), amphibolite, quartzite, marble and skarn; abundant and locally dominant pegmatite, muscovite granite, granodiorite, and granodioritic to tonalitic gneiss that may range from Paleozoic to Tertiary in age; PPSm - marble and diopsidic marble with lesser calcsilicate gneiss and amphibolite; PPSmh - marble and hornblende gneiss; PPSq - quartzite

INTRUSIVE ROCKS

TERTIARY

LATE PALEOCENE TO EARLY EOCENE

PEg

Leucogranite and pegmatite

CRETACEOUS AND/OR TERTIARY(?)

KTg

Leucocratic biotite and biotite muscovite granite, quartz monzonite, pegmatite and aplite; locally includes granitic gneiss and/or abundant screens of country rock; in whole or in part may be equivalent to unit PEg

CRETACEOUS(?)

Kgd

Granodiorite, granite, quartz monzonite; minor diorite, quartz diorite, gabbro

Kdi

Diorite

Ksy

Syenite and monzonite
 

Geological map and legend compiled from:

Bosdachin, R. and Harrap, R.M. (1988): Stratigraphy and structure of the Monashee Complex and overlying rocks adjacent to the Trans-Canada Highway, west of Revelstoke, B.C.; in Current Research, Part E, Geological Survey of Canada, Paper 88-1E, pp. 19-23.

Coleman, V.J. (1989): The Cariboo duplex at the southern boundary of the Monashee Complex, southern British Columbia; in Current Research, Part E, Geological Survey of Canada, Paper 89-1E, pp. 89-93.

Johnson, B.J. (1990): Geology Adjacent to the Western Margin of The Shuswap Metamorphic Complex; B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1990-30.

Jones, A.G. (1959): Vernon Map Area, British Columbia; Geological Survey of Canada, Memoir 296.

Okulitch, A.V. (1979): Geology, Thompson-Shuswap-Okanagan Region, South-Central British Columbia; Geological Survey of Canada, Open File 637, Scale 1:250,000.

Okulitch, A.V. (1989): Revised stratigraphy and structure in the Thompson-Shuswap-Okanagan map area, southern British Columbia; in Current Research, Part E, Geological Survey of Canada, Paper 89-1E, pp. 51-60.

Okulitch, A.V. and Woodsworth, G.J. (1977): Geology, Kootenay River, British Columbia, Alberta, United States; Geological Survey of Canada, Open File 481, Scale 1:1,000,000.

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.