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TitleGeology, Corbett Hill, Yukon
AuthorLane, L S
SourceGeological Survey of Canada, Canadian Geoscience Map 70, 2013, 1 sheet,
PublisherNatural Resources Canada
Maps1 map
Map Info.geological, bedrock geology, structural features, 1:50,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 8 (NAD83)
Mediaon-line; digital
File formatreadme
File formatshp; pdf; JPEG2000; rtf; xml; xls
AreaCorbett Hill; Eagle River; Eagle Plains
Lat/Long WENS-137.0000 -136.5000 66.5000 66.2500
Subjectsstratigraphy; structural geology; bedrock geology; structural features; folds; faults; deformation; sedimentary rocks; sandstones; shales; limestones; dolostones; Hart River Formation; Ford Lake Shale; Tuttle Formation; Tuttle Anticline; Paleozoic; Carboniferous; Devonian
ProgramYukon Sedimentary Basins, GEM: Geo-mapping for Energy and Minerals
Released2013 11 05
AbstractThis map is dominated by a single broad structure, the Tuttle anticline, developed in shale and coarse clastic rocks of the uppermost Imperial and Tuttle formations and Ford Lake Shale. A limited expanse of Hart River Formation is preserved in the southwest. Biostratigraphic ages vary from Famennian (Late Devonian) in the Imperial Formation in the north, to Viséan or Serpukhovian (Early Carboniferous) in the Hart River Formation in the southwest. Similar to the adjacent Mount Joyal map area to the north, the sandstone and conglomerate of the Tuttle Formation display rapid lateral variations in thickness and facies. This is reflected in the delineation of four mappable lithofacies with no specific stratigraphic order. Although poor exposure precludes a definitive explanation, a channellized depositional system is inferred. The trace of the Tuttle anticline deflects abruptly eastward in the map area. The fold axis appears to be localized where both the lowest and highest thick sandstone-dominated units of the Tuttle Formation thin abruptly eastward. At depth, the Tuttle anticline is poorly resolved in a short seismic reflection profile. However, farther north, seismic images show that the anticline is accommodated at the level of the Ogilvie Formation (limestone) by steep reverse faults.
Summary(Plain Language Summary, not published)
This new 1:50,000 scale map is a product of the Geo-mapping for Energy and Minerals (GEM) Program. The area has never been mapped except at an initial reconnaissance scale. The new map provides important new insights on the sedimentary geology of Paleozoic rocks, in an area of current interest for petroleum exploration.