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TitleBedrock geology, Brock River, Northwest Territories-Nunavut, NTS 97-D
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorRainbird, R HORCID logo
SourceGeological Survey of Canada, Canadian Geoscience Map 407, 2019, 1 sheet, Open Access logo Open Access
Alt SeriesNorthwest Territories Geological Survey, NWT Open File 2019-04
PublisherNatural Resources Canada
PublisherGovernment of Northwest Territories
Maps1 map
Map Info.geological, bedrock geology, 1:250,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 10 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf (Adobe® Reader®); rtf; gdb (ESRI® ArcGIS(TM) v.10.x); shp (ESRI® ArcGIS(TM) v.10.x); xml (ESRI® ArcGIS(TM) v.10.x); mxd (ESRI® ArcGIS(TM) v.10.x); xls (Microsoft® Excel®); tif
ProvinceNorthwest Territories; Nunavut
AreaBrock River
Lat/Long WENS-124.0000 -120.0000 70.0000 69.0000
Subjectsregional geology; stratigraphy; structural geology; geophysics; surficial geology/geomorphology; bedrock geology; lithology; igneous rocks; intrusive rocks; mafic intrusive rocks; diabases; sedimentary rocks; dolostones; breccias; limestones; grainstones; cherts; sandstones; arenites; shales; siltstones; mudstones; dolomites; structural features; faults; faults, normal; folds; synclines; anticlines; columnar jointing; bedding planes; fractures; lineations; sedimentary structures; intrusions; sills; diabase dykes; remote sensing; satellite imagery; sediments; colluvial deposits; marine sediments; tills; fossils; stromatolites; biostromes; Brock Inlier; Neoproterozoic; Langton Bay Formation; Horton River Formation; Bear Rock Formation; Franklin Mountain Formation; Mount Cap Formation; Mount Clark Formation; Franlkin Diabase; Shaler Supergroup; Boot Inlet Formation; Grassy Bay Formation; Aok Formation; Nelson Head Formation; Mikkelsen Islands Formation; Escape Rapids Formation; Minto Inlet Formation; Jago Bay Formation; alluvial sediments; glaciofluvial sediments; geological contacts; station locations; Phanerozoic; Cenozoic; Quaternary; Mesozoic; Cretaceous; Paleozoic; Devonian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationslocation maps; index maps; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals Mackenzie Corridor, Coppermine River Transect
ProgramPolar Continental Shelf Program
Released2019 11 06
AbstractThis bedrock geological map is a product of the Geo-mapping for Energy and Minerals Program, Mackenzie Project. Mapping was carried out in parallel with detailed stratigraphic and sedimentological studies mainly focused along the Hornaday and Brock rivers, Northwest Territories, and their tributaries during a three-week period in late July and August of 2014. The map covers the northern part of the Brock Inlier, an uplifted, mildly folded and faulted region of mainly Mesoproterozoic (Stenian-Tonian) sedimentary rocks of the Shaler Supergroup and Neoproterozoic (Cryogenian) mafic intrusive rocks, surrounded and draped by early Paleozoic (Cambrian-Devonian) and Cretaceous sedimentary rocks. The geological interpretation was aided by 2D and 3D visualization of moderate-resolution satellite imagery (Spot 5 and RapidEye-5m panchromatic).
Summary(Plain Language Summary, not published)
Bedrock geology of the northern Brock Inlier is intended to be an update of GSC Preliminary Map 13-1970 by H.R. Balkwill and C.J. Yorath (1970). Highlights new stratigraphic units of the Proterozoic Shaler Supergroup and incorporates subsequent mapping by Jones et al., 1992. Much of the geological interpretation was aided by 3D visualization of moderate-resolution satellite imagery (RapidEye-5m panchromatic).

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