GEOSCAN Search Results: Fastlink


TitleLower and Middle Devonian outcrop stratigraphy of northeast British Columbia
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorNadjiwon, L M; Morrow, D W; McCracken, A D; Coniglio, M
SourceCentral Foreland NATMAP Project: Proterozoic to Devonian stratigraphic sections in British Columbia and Yukon; by Lane, L SORCID
logo (ed.); MacNaughton, R BORCID logo (ed.); Geological Survey of Canada, Bulletin 603, 2017 p. 223-292, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Central Foreland NATMAP Project: Proterozoic to Devonian stratigraphic sections in British Columbia and Yukon
File formatreadme
File formatpdf; csv; xlsx
ProvinceBritish Columbia
NTS94B; 94C; 94F; 94G; 94J; 94K; 94N; 94O
AreaHalfway River; Trutch
Lat/Long WENS-126.0000 -122.0000 60.0000 56.0000
Subjectsregional geology; stratigraphy; paleontology; systematic stratigraphy; lithostratigraphy; biostratigraphy; fossils; macrofossils; microfossils; conodonts; depositional environment; hydrothermal systems; paleogeography; bedrock geology; lithology; sedimentary rocks; dolomites; limestones; sandstones; clastics; breccias; correlations; sedimentary structures; stratigraphic correlations; Canadian Cordillera; Cordilleran Foreland; Macdonald Platform; Presqu'ile Barrier Reef Complex; Rocky Mountain Thrust Belt; Presqu'ile Dolomite; Chinchaga Formation; Slave Point Formation; Dunedin Formation; Manetoe Dolomite; Besa River Formation; Laurier Embayment; Stromatoporoids; Brachiopods; Muncho-McConnell Formation; Wokkpash Formation; Stone Formation; Watt Mountain Formation; Great Slave Shear Zone; Liard Line; Opsika Embayment; Keg River Formation; Road River Formation; Meilleur River Embayment; Cassiar Platform; Tintina Fault; Funeral Formation; Nahanni Formation; Peace River Arch; Muskeg Formation; Nonda Formation; Phanerozoic; Paleozoic; Devonian
Illustrationslocation maps; geoscientific sketch maps; tables; stratigraphic charts; correlation charts; schematic cross-sections; photographs; lithologic sections
ProgramCentral Foreland NATMAP Project
Released2017 12 29
AbstractPresqu'ile Barrier reef strata are documented in six measured sections from southern Trutch and Halfway River map areas, Rocky Mountain Thrust Belt, northeastern British Columbia. They contain abundantly stromatoporoidal strata as young as mid-Givetian. Presqu'ile Dolomite is commonly developed in large masses within thick 'Upper Chinchaga to Slave Point Undivided' limestone successions in outcrop. Less extensive, white, hydrothermal dolospar is developed within relatively thin Dunedin Formation strata, particularly in slope settings immediately basinward of the Presqu'ile Barrier reef complex. Manetoe Dolomite occurs within Dunedin strata, even in northernmost sections. The Dunedin Formation's basal unconformity and its diachronous and gradational upper contact with the Besa River Formation are confirmed and documented. Lower to Middle Devonian siliciclastic units occur within the Laurier Embayment, a broad bypass channel through the Presqu'ile Barrier reef complex. Extensive Presqu'ile Dolomite occurs south of Laurier Embayment, similar to that in the nearby Clarke Lake gas field.
Summary(Plain Language Summary, not published)
This bulletin presents detailed descriptions and measured thicknesses for a suite of 79 stratigraphic sections ranging in age from the Late Precambrian to the Devonian, distributed across northern British Columbia and adjacent Yukon. These descriptions permit interpretations of regional trends in the distribution of shallow water vs deeper water successions through early Paleozoic time. This extensive data compilation underpins syntheses, presented here and in external publications, of the changes to the form and depth of western Canada's Paleozoic marginal seas and their implications for regional hydrocarbon potential.

Date modified: