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TitleStratigraphy of Lower and Middle Devonian carbonate rocks of northeastern British Columbia
AuthorNadjiwon, L N; Morrow, D W; Coniglio, M
SourceGeological Survey of Canada, Current Research (Online) no. 2000-E1, 2000, 9 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2000). Current Research 2000, Geological Survey of Canada, Current Research (Online) no. 2000-ABCDE
File formatpdf
ProvinceBritish Columbia
NTS94B; 94G; 94J; 94K; 94N; 94O
AreaMuncho Lake; Ospika Embayment; Laurier Bypass
Lat/Long WENS-126.0000 -122.0000 60.0000 56.0000
Subjectsstructural geology; stratigraphy; bedrock geology; stratigraphic correlations; stratigraphic analyses; structural features; unconformities; lithology; shales; sedimentary rocks; carbonate rocks; sandstones; arenites; alteration; dolomitization; breccias; limestones; dolostones; depositional environment; Lower Devonian; Middle Devonian; Famennian; Frasnian; Givetian; Eifelian; Emsian; Siegenian; Gedinnian; facies; Besa River Formation; Muncho-McConnell Formation; Wokkpash Formation; Stone Formation; Dunedin Formation; Keg River Formation; Slave Point Formation; Devonian
Illustrationssketch maps; photographs; stratigraphic columns
ProgramCentral Foreland NATMAP Project
Released2000 07 01
AbstractDevonian carbonate rocks of northeastern British Columbia overlie the "sub-Devonian unconformity" and pass upward to shale of the Besa River Formation. Lowermost of these carbonate rocks is the thick Muncho-McConnell Formation shallow marine carbonate rocks. In the northern part of the study area the Wokkpash Formation, a dolomitic, quartz arenite sandstone displaying soft-sediment deformation, separates the Muncho-McConnell from the overlying Stone Formation, but in the south the Wokkpash is absent. The thick, uniformly grey and bluish-grey dolomite units of the Stone Formation display fenestral fabric, mud-chip breccias, and finely laminated beds. The gas-bearing Dunedin, Keg River, and Slave Point formations, overlying the Stone Formation in outcrop, are dominantly micritic to fine-grained fossiliferous marine limestone. Transitions from off-reef to reefal in these strata are accompanied by an increase in fossil abundance and size, and increased dolomitization. Several different breccia types are found within the Dunedin and Stone formations associated with dolomitization.