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TitleGeological relationships at Upper Arrow Lake, southeastern British Columbia: implications for the Milford and Kaslo groups
AuthorKraft, J L; Thompson, R I; Erdmer, P
SourceGeological Survey of Canada, Current Research (Online) no. 2007-A8, 2007, 12 pages,
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf
ProvinceBritish Columbia
NTS82K/05; 82K/06SW; 82K/06NW; 82K/11SW; 82K/11NW; 82K/12; 82K/13SE; 82K/13SW; 82K/14SW
AreaUpper Arrow Lake; Northeat Arm; Blind Bay; Galena Bay; Trout Lake; Ferguson; Beaton; Nakusp; Halfway River; Mount Wilkie; Mount Murray; Mount Sproat
Lat/Long WENS-118.0000 -117.3000 50.8333 50.2500
Subjectsregional geology; stratigraphy; structural geology; continental margins; bedrock geology; stratigraphic analyses; stratigraphic correlations; structural analyses; structural features; fault zones; faults; faults, normal; faults, reverse; folds; anticlines; igneous rocks; intrusive rocks; monzonites; granodiorites; diorites; metasedimentary rocks; metavolcanic rocks; phyllites; greenstones; basalts; sandstones; conglomerates; schists; quartzites; gneisses; greenschist facies; cherts; limestones; mafic volcanic rocks; intrusions; batholiths; tectonic history; metamorphism; strain; fossils; microfossils; Canadian Cordillera; Columbia River Fault Zone; Standfast Creek Fault; Stubbs Fault; Thor-Odin culmination; Trout Lake syncline; Kootenay Arc; Okanagan plutonic suite; Nelson plutonic suite; Galena Bay stock; Kuskanax batholith; Slocan Group; Kaslo Group; Silver Creek Formation; Chase Formation; Monashee Gneiss Complex; Milford Group; Lardeau Group; Northeast Arm assemblage; Badshot Formation; Hamill Group; Eagle Bay assemblage; Index Formation; McHardy assemblage; Davis assemblage; Neoproterozoic; Paleoproterozoic; calc-silicates; argillaceous rocks; siliciclastic rocks; Phanerozoic; Mesozoic; Jurassic; Triassic; Paleozoic; Permian; Carboniferous; Devonian; Cambrian; Precambrian; Proterozoic
Illustrationssketch maps; photographs; stratigraphic columns; cross-sections
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
ProgramNSERC Natural Sciences and Engineering Research Council of Canada
Released2007 07 01
AbstractDevonian strata correlative with the Devonian Silver Creek and Chase formations have recently been recognized beneath argillaceous Milford Group rocks on the western margin of the northern Kootenay Arc at Upper Arrow Lake. New mapping demonstrated that those argillaceous rocks conformably overlie the Devonian units, suggesting that that component of Milford Group and overlying mafic volcanic
rocks, which had both been assigned to the Slide Mountain terrane, were deposited on Devonian continental margin strata and are therefore parautochthonous. That these units were deposited on equivalents of the Silver Creek Formation implies a stratigraphic connection to the Eagle Bay assemblage. Detailed mapping in the vicinity of the Northeast Arm of Upper Arrow Lake characterized an assemblage of phyllite, limestone, quartzite, and greenstone that is interpreted as resurfacing of the Index Formation along the western limit of the Lardeau Group.