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Ministry of Energy Mines and Responsible for Core Review

103I Geological Legend

 

Terrace

STRATIFIED ROCKS

QUATERNARY

RECENT

Rvb

Basalt, ash

PLEISTOCENE AND RECENT

Qs

Non-marine and marine sand, gravel, clay, glacial deposits
JURASSIC AND CRETACEOUS

BOWSER LAKE GROUP

JKs

Siltstone, argillite, greywacke, conglomerate; minor tuff (includes upper part of HAZELTON GROUP)
JURASSIC

MIDDLE JURASSIC

YAKOUN GROUP

MJy

Andesite, agglomerate

LOWER JURASSIC

HAZELTON GROUP

LJhv

Andesite, basalt

LJvd

Andesite, some rhyolite, dacite, breccia, tuff greywacke, argillite
TRIASSIC

Trs

Limestone conglomerate, greywacke, volcanic sandstone, chert

Trsv

Andesite, breccia, tuff, greywacke, argillite
CARBONIFEROUS AND PERMIAN

CPc

Limestone, chert

CPvs

Greenstone, shale, limestone
PALEOZOIC

UPPER PALEOZOIC AND (?) OLDER

Psn

Meta-sediments, amphibolite, schist, gneiss of garnet to sillimanite grade

Pm

Amphibolite, gneiss, migmatite

Pn

Biotite gneiss, gneissic granitic rocks, migmatite of almandine-amphibolite grade

PLUTONIC ROCKS

TERTIARY

EARLY TERTIARY

ETg

Granite

ETqm

Quartz monzonite

ETgd

Granodiorite

ETdi

Diorite
JURASSIC AND CRETACEOUS

EARLY JURASSIC

EJg

Granite
AGE UNKNOWN

COAST PLUTONIC COMPLEX

qm

Quartz monzonite

gd

Granodiorite

gd-b

Biotite granodiorite

qd

Quartz diorite

qdn

Foliated quartz diorite and gneiss

di

Diorite

din

Foliated to gneissic diorite, migmatite, amphibolite

b

Gabbro-diorite migmatite complex

m

Amphibolite, gneiss

sn-h

Schist, gneiss, quartzite of amphibolite grade

 

Geological map and legend from:

Hutchison, W.W. and A.V. Okulitch (compilers)(1973): Skeena River; Geological Survey of Canada, Map 1385A, 1:1,000,000

Hutchison, W.W. (compiler)(1971): Prince Rupert-Skeena; Geological Survey of Canada, Map 1472A (Memoir 394), 1:250,000

Souther, J.G. and S. Duffell (1964): Terrace; Geological Survey of Canada, Map 1136A (Memoir 329), 1:250,000

See Terrace (103I) Summary Sheet for an overview of the map area.

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.