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Ministry of Energy Mines and Responsible for Core Review

082KNE Geological Legend

 

LAYERED ROCKS

QUATERNARY

PLEISTOCENE AND RECENT

Qal

Unconsolidated glacial, fluvial and alluvial deposits

UPPER DEVONIAN

uDs

Starbird Formation: Thin to medium-bedded dolomitic biowacke stone

MIDDLE DEVONIAN

mDmf

Mount Forster Formation: Red, green, and buff-weathering dolomites, dolomitic shales with sandstone and conglomerate

ORODOVICIAN AND SILURIAN

Osb

Beaverfoot Formation: Thick-bedded grey biowake stones, peletoidal mudstones with white quartzite at base

UPPER CAMBRIAN AND ORDOVICIAN

uCOm

McKay Group: Red and grey shales, thin sandstones and biowacke stones

MIDDLE CAMBRIAN

mCj

Jubilee Formation: Massive grey-buff dolomites with crypt algal-laminites and thin flat pebble conglomerates

LOWER CAMBRIAN

lCc

Cranbrook Formation: Thick bedded white quartzites and quartz grits

UPPER PROTEROZOIC

WINDERMERE SUPERGROUP (uPhc and uPt)

uPhc

Horsethief Creek Group: Grey-black, green and red argillites, quartz pebble conglomerate, grits, and sandstone; minor black limestone and buff dolomites at base

uPt

Toby Formation: Polymict and monomict diamictites, conglomerates, breccias (sandstones or argillite matrix) and grits and green and red argillites

MIDDLE PROTEROZOIC

PURCELL SUPERGROUP (mPfc to mPdc)

mPfc

Frances Creek Formation (informal): White orthoquartzites, grey dolomites, and interbedded sandstone and shale; halite pseudomorphs in dolomites

mPmn

Mount Nelson Formation: White orthoquartzite, buff and grey dolomites, purple and red shales with dolomite interbeds

mPdc

Dutch Creek Formation: Interbedded grey quartzites, black-green argillites and laminated buff dolomites

 

INTRUSIVE ROCKS

CRETACEOUS

Kqm

Quartz monzonite (Horsethief Creek and Bugaboo batholiths (eastern part))

Kgd

Granodiorite (Bugaboo Batholith (western part)), Granodiorite (Bugaboo Batholith (western part)),

UPPER PROTEROZOIC

Pmd

Green metadiabase dikes

 

Geological map and legend compiled from:

Bennett, S. (1986): Geology of the Mount Forster Map - Area: B.C., Ministry of Energy, Mines and Petroleum Resources, Preliminary Map 62.

Pope, A. (1990): The Geology and Mineral Deposits of the Toby-Horsethief Creek Map Area, Northern Purcell Mountains, Southeast British Columbia (82K); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1990-26.

Reesor, J.E. (1973): Geology of the Lardeau Map Area; Geological Survey of Canada, Memoir 369, 129 pages.

See INVERMERE (082KNE) Summary Sheet for an overview of the map area 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.