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Ministry of Energy Mines and Responsible for Core Review

082FSW Geological Legend

 

Trail

CENOZOIC

TERTIARY
Tr rhyolite dykes
Ti hornblende-feldspar and hornblende porphyries
EOCENE OR PALEOCENE

PEg

Leucocratic biotite quartz monzonite
     MIDDLE EOCENE
mEc CORYELL INTRUSIONS biotite monzonite, biotite--augite monzonite
mEs SHEPPARD INTRUSIONS granite, rhyolite dykes
mEm MARRON FORMATION andesite flows; minor lapilli tuff, tuffaceous, sandstone and tuffaceous conglomerate
PALEOCENE

Pgn

K-feldspar megacrystic biotite-hornblende quartz monzonite

MESOZOIC

CRETACEOUS

Kg

KINNAIRD GNEISS leucocratic hornblende and biotite gneiss; with K-feldspar augen, leucocratic veins and pegmatite, amphibolite layers and boudins, granitic layers and quartz poor phases ±diorite orthogneiss
     UPPER CRETACEOUS

uKsm

SOPHIE MTN FORMATION coarse conglomerate with quartzite and/or siltstone clasts, minor argillite
     LOWER CRETACEOUS

IKg

granite, quartz porphyry
     MIDDLE TO LATE JURASSIC

mJn

NELSON INTRUSIONS includes Nelson, Bonnington (mJb), Trail (mJt) and Mackie (mJm) plutons: porphyritic granite, granodiorite, quartz monzonite and minor diorite porphry and breccia
     MIDDLE JURASSIC

mJsk

SILVER KING INTRUSIONS plagioclase porphyry

Jp

diorite, meta--diorite, pyroxenite
     LOWER JURASSIC

IJrm

ROSSLAND MONZONITE biotite/biotite-augite monzonite
Jdi diorite
IJr ROSSLAND GROUP mafic to intermediate flows and tuff's, tuffites, argillaceous siltstone, turbidit siltstone and wacke, minor pebble conglomerate and subvolconic intrusions
IJh HALL FORMATION argillite, carbonaceous siltstone; minor pebble conglomerate and carbonate
IJe ELISE FORMATION mafic flows, pyroclastic breccia; mafic to intermediate tuffs, tuffites
IJes Elise sedimentary rock argillaceous siltstone
IJeu Upper Elise Formation basaltic to andesitic lapilli, crystal and fine tuff, tuffaceous siltstone and conglomerate
IJel Lower Elise Formation basaltic flows and flow breccias, basaltic pyroclastic, breccia, minor basaltic to andesitic crystal and fine tuff
Ja ARCHIBALD FORMATION argillite, turbidite siltstone, conglomerate and minor maroon siltstone
     LOWER JURASSIC AND UPPER TRIASSIC

IJy

YMIR GROUP argillite, siltstone, grit. impure limestone; minor chert, wacke; generally rusty-weathering

PALEOZOIC

Pms

metasedimentary rock, limestone
DEVONIAN TO EOCENE (?)

tg

TRAIL GNEISS amphibolite and biotite gneiss, hornblende gneiss, minor schist, pegmatite and aplite
PENNSYLVANIAN (?)

cg

CASTLEGAR GNEISS COMPLEX heterogeneous hornblende ±biotite quartz-feldspar paragneiss, amphibolite, calc-silicate gneiss
PENNSYLVANIAN TO PERMIAN

PMR

MOUNT ROBERTS FORMATION siliceous siltstone, argillite, silty chert; minor sandstone and limestone or dolomite
     UPPER MISSISSIPIAN TO LOWER PERMIAN

MN

MILFORD GROUP siliceous argillite and phyllite, grey limestone; chert
DEVONIAN

Djp

JOHNSON CREEK PLUTON

gn

layered granitoid gneiss and amphibolite
     LOWER AND (?) MIDDLE ORDOVICIAN

Oa

ACTIVE FORMATION black argillite, slate, quartzite
     MIDDLE CAMBRIAN

mCn

NELWAY FORMATION black limestone, calcareous argillite, slate, and phyllite
     LOWER CAMBRIAN

IClb

LAIB FORMATION phyllite, argillite, schist, micaceous quartzite; Reeves (Badshot) limestone member
     LOWER CAMBRIAN TO LATE PROTEROZOIC

ICh

HAMILL GROUP argillite, micaceous schist, quartzite, argillaceous quartzite; Reno and Quartzite Range Formations
PRECAMBRIAN
     LATE PROTEROZOIC
WINDEMERE GROUP
Wtm grit and quartzite, minor schist, limestone, argillite and phyllite, minor conglomerate; Three Sisters and Monk Formations
Wi IRENE FORMATION greenstone, minor argillite, limestone ,
CARBONIFEROUS

Cs

argillite, silty argillite, siltstone; minor limestone (probably equivalent to Pms)
     LOWER PALEOZOIC

IPms

quartzite, argillite, slated; minor limestone, black phyllite and schist

IPI

LARDEAU CROUP quartzite, schist, argillite, slate, limestone; minor igneous members

um

ULTRAMAFIC ROCKS serpentinte, minor dunite
Geological legend and base derived from:

Andrew, K.P.E., Hoy, T. and Simon P. (1991): Geology of the Trail Map Area, B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1991-16, scale 1:100,000.

See Trail (082FSW) 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.