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Ministry of Energy Mines and Responsible for Core Review

092B,C Geological Legend

 

STRATIFIED ROCKS

CENOZOIC

QUATERNARY

PLEISTOCENE AND RECENT

Qs

Unconsolidated sediments

TERTIARY

EOCENE AND OLIGOCENE

EOC

CARMANAH GROUP: Sandstone, shale, conglomerate

EOCENE

EM

METCHOSIN VOLCANICS: Pillow basalt

MESOZOIC

CRETACEOUS

UPPER CRETACEOUS

uKN

NANAIMO GROUP: Sandstone, shale, conglomerate

LOWER JURASSIC

IJB

BONANZA GROUP: Andesite, dacite, rhyolite

TRIASSIC

UPPER TRIASSIC

VANCOUVER GROUP

uTq

QUATSINO and PARSON BAY FORMATIONS: Limestone, argillite

uTk

KARMUTSEN FORMATION: Basalt, pillow lava

PALEOZOIC

PENNSYLVANIAN TO PERMIAN(?)

PBL

BUTTLE LAKE GROUP: Limestone

DEVONIAN TO PENNSYLVANIAN

CS

SICKER GROUP: Meta-andesite, dacite

COWICHAN UPLIFT

BUTTLE LAKE GROUP

PERMIAN(?)

PBs

ST. MARY'S LAKE: Volcanic sandstone, conglomerate, sandstone-argillite turbidites

UPPER PENNSYLVANIAN TO PERMIAN

PBmm

MOUNT MARK FORMATION: Massive calcarenite, calcirudite; chert; argillite

MISSISSIPPIAN TO PENNSYLVANIAN

PBf

FOURTH LAKE FORMATION: Cherty sediments, volcanic sandstone; argillite; calcarenite

SICKER GROUP

UPPER DEVONIAN

PSmr

MCLAUGHLIN RIDGE FORMATION: Thickly bedded tuffite, lithic tuffite; laminated cherty tuff; heterolithic lapilli tuff, breccia

DEVONIAN

PSn

NITINAT FORMATION: Porphyritic agglomerate, breccia, lapilli and crystal tuff; porphyritic pillowed and massive flows

PSd

DUCK LAKE FORMATION: Pillowed and massive basalt flows, pillow breccia; chert, jasper; minor felsic tuff; dacite intrusions

INTRUSIVE ROCKS

CENOZOIC

TERTIARY

EARLY TO MIDDLE EOCENE

ETt

TERTIARY INTRUSIONS: Quartz diorite, granodiorite, quartz monzonite

ETs

SOOKE GABBRO: Augite gabbro

MESOZOIC

JURASSIC

EARLY TO MIDDLE JURASSIC

Jg

ISLAND PLUTONIC SUITE: Granodiorite, quartz diorite

TRIASSIC

LATE TRIASSIC

uTi

SILLS AND DYKES: Diabase and gabbro (coeval with Karmutsen Formation, informally known as Mount Hall Gabbro)

LATE DEVONIAN

uDs

SALTSPRING INTRUSIVE SUITE: Granodiorite and feldspar porphyry, quartz-feldspar porphyry

METAMORPHIC ROCKS

JURASSIC AND CRETACEOUS

JKlr

LEECH RIVER COMPLEX: Greywacke, phyllite, schist

JKpr

PACIFIC RIM COMPLEX: Greywacke, argillite, meta-siltstone

PALEOZOIC AND MESOZOIC

PMw

WESTCOAST COMPLEX: Gneiss, amphibolite, migmatite, agmatite, quartz diorite

Pc

COLQUITZ GNEISS: Quartz-feldspar gneiss

Pw

WARK GNEISS: Massive and gneissic metadiorite, metagabbro, amphibolite

 

Geological map and legend from:

Massey, N.W.D. (1991): Personal Communication

Massey, N.W.D. and Friday, S.J. (1988): Geology of the Port Alberni-Nanaimo Lakes Area, Vancouver Island; Ministry of Energy, Mines and Petroleum Resources, Geological Fieldwork 1988

Massey, N.W.D., Compiler (1987): Geology of the Duncan and Chemainus River Area, Vancouver Island; Ministry of Energy, Mines and Petroleum Resources, Open File Map 1988-8, 1: 20,000

Massey, N.W.D., Compiler (1987): Geology of the Cowichan Lake Area, Vancouver Island; Ministry of Energy, Mines and Petroleum Resources, Open File Map 1987-2, 1: 20,000

Muller, J.E. (1982): Geology of the Nitinat Lake Map Area, Vancouver Island; Geological Survey of Canada, Open File 821, 1: 125,000

Roddick, J.A., Muller, J.E. and Okulitch, A.V., Compilers (1976): Fraser River; Geological Survey of Canada, Map 1386A, 1: 1,000,000

Muller, J.E. (1979, 1980): Victoria; Geological Survey of Canada Map 1553A, 1: 1,000,000

See  VICTORIA (092B) and CAPE FLATTERY (92C) Summary Sheets for an overviews of the map areas 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.