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TitleBedrock geology, Polley Hill, Yukon
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorLane, L SORCID logo
SourceGeological Survey of Canada, Canadian Geoscience Map 129, 2017, 1 sheet, Open Access logo Open Access
PublisherNatural Resources Canada
Maps1 map
Map Info.geological, bedrock geology, 1:50,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 8 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf (Adobe® Reader®); rtf; gdb (ESRI® ArcGIS(TM) v.10.2.2); shp (ESRI® ArcGIS(TM) v.10.2.2); xml (ESRI® ArcGIS(TM) v.10.2.2); mxd (ESRI® ArcGIS(TM) v.10.2.2)
AreaPolley Hill; White Fox Creek
Lat/Long WENS-137.0000 -136.5000 67.0000 66.7500
Subjectsregional geology; stratigraphy; structural geology; bedrock geology; lithology; sedimentary rocks; shales; siltstones; sandstones; conglomerates; structural features; faults; faults, normal; faults, thrust; folds; anticlines; synclines; monoclines; bedding planes; depositional environment; Parkin Formation; North Branch Formation; Husky Formation; Parson Group; Tuttle Formation; Imperial Formation; Ellesmerian Orogeny; North Tuttle Syncline; Deception Fault; Phanerozoic; Mesozoic; Cretaceous; Jurassic; Paleozoic; Carboniferous; Devonian
Illustrationslocation maps; index maps; photographs; tables
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic Project Management
Released2017 12 14
AbstractThe Polley Hill map area lies at the transition from Eagle Plain in the west to the Richardson Mountains in the east. The map area is largely underlain by Late Devonian and Early Carboniferous strata, with Cretaceous and locally Jurassic strata lying unconformably on the older successions. New field mapping has improved the definition and refined the extent of the map units and structures present, in spite of poor exposure and extensive tree cover that limit helicopter access. The regionally important Deception Fault is a west-directed thrust fault that carries the Imperial Formation westward over Upper Devonian, Carboniferous and Cretaceous strata. In and adjacent to the northwest part of the map area, 1970s vintage seismic reflection profiles were used to inform the surface structural geometry. A subsurface east-trending syncline that pre-dates the Cretaceous succession is observed in the seismic data and projected to the surface. This is one of the most southerly structures of the Late Devonian - Early Carboniferous Ellesmerian Orogeny that affected much of Arctic Canada.
Summary(Plain Language Summary, not published)
This new 1:50,000 scale GIS map of bedrock geology provides a needed update to previous, smaller scale maps produced in the early 1980's in light of accumulated advances in defining the regional stratigraphic successions and deformation history, as well as modern, more accurate base maps. This area covers part of the Richardson Mountains on the northeast margin of Eagle Plain which contains a proven petroleum resource. This part of the Richardson Mountains is also adjacent to one of the most seismically active areas in northern Canada. This map will provide geoscience knowledge to support land use decision making, including seismic hazard analysis, and resource exploration decisions.

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