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TitleGeology of McBride map-area, British Columbia (93H)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCampbell, R B; Mountjoy, E W; Young, F G
SourceGeological Survey of Canada, Paper 72-35, 1973, 115 pages (3 sheets), Open Access logo Open Access
PublisherDepartment of Energy, Mines and Resources Canada
MapsPublication contains 1 map
Map Info.geological, 1:250,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 10U
Mediapaper; on-line; digital
RelatedThis publication contains Geology, McBride, British Columbia; Geology, McBride, British Columbia
RelatedThis publication supercedes Geology of McBride map-area, British Columbia
File formatpdf
ProvinceBritish Columbia
Lat/Long WENS-122.0000 -120.0000 54.0000 53.0000
Subjectseconomic geology; structural geology; stratigraphy; general geology; regional geology; fossil distribution, geographic; fossil lists; gold; lithology; carbonates; shales; volcanic rocks; sedimentary rocks; basalts; intrusive rocks; serpentinization; faults, thrust; coal; bedrock geology; Phanerozoic; Mesozoic; Paleozoic; Precambrian
Illustrationscorrelation charts; cross-sections, stratigraphic; cross-sections, structural; stratigraphic sections
Released1974 04 01; 2014 04 10
AbstractMcBride map-area, about 5, 800 square miles in east-central British Columbia, includes parts of the Interior Plateau, Cariboo Mountains, Rocky Mountain Trench, Rocky Mountains, and F oothills. About 25, 000 feet of Prote rozoic (Windermere) and Lower Cambrian strata can be correlated in some detail from Rocky to Cari boo Mountains. The precision of the correl ation, based partly on lithologic similarities , depends primarily on the obvious equivalence of the fossiliferous Lower Cambrian carbonate (Mural Formation) in each sequence. The stratigraphy above the Lower Cambrian diffe rs sharply from one side of the Trench t o the other. In Rocky Mountains a carbonate-shale Cambra-Ordovician sequence, much like that at Mount Robson, becomes shaly near the Trench where overlying Silurian strata include volcanic rocks. The Upper Devonian to Permian and Mesozoic sedimentary rocks of the Front Range and Foothills are similar to those of the well-known Jasper-Banff region. West of the Trench, Lower Cambrian beds pass upward t o a Middle (?) and Upper Cambrian shale sequence that is unconforrnably overlain by Lower Devonian and(?) younger sedimentary rocks w hich in turn lie dis co rdantly below conglomerate and basaltic pillow lava at l eas t partly of Lower Mississippian age. These are followed by unconforrnably overlying Uppe r Triassic (?) phy llite and shale. The Uppe r Triassic and Lowe r Jurassic volcanic rocks of the Inte rior Plateau are just west of the map-area. Minor dykes and sills and a small body of serpentinite are the only known intrusive rocks in the map-area. Typical Rocky Mountain thrust faults are confined to the eastern Main Ranges, Front Ranges, and Foothills. Farther we st in Rocky Mountains and also west of the Trench fold ing is prominent and r ecognizable fau lts are steeply dipping. In Cari boo Mountains folds in structurally deep levels apparently grade upward to a highly faulted and little folded terrane. To date the only significant mineral production was from the gold placer and l ode d e posits near Barkerville. The Bowron River coal d epos its have been extensively expl o r e d. Small copper showings are known near Dorne Creek.

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