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TitleSurficial geology, Kyklo Creek, British Columbia
AuthorSmith, I R
SourceGeological Survey of Canada, Open File 5307, 2009, 1 sheet; 1 CD-ROM, (Open Access)
LinksMetadata - Métadonnées
Alt SeriesBritish Columbia Ministry of Energy, Mines and Petroleum Resources, Map 2009-1
PublisherNatural Resources Canada
Documentopen file
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:50,000
Mediapaper; CD-ROM; digital; on-line
File formatreadme / lisez-moi
File formate00 (ESRI® ArcExplorer v. 2.0 is included / est fourni); shp; pdf; shx; dbf; tif; JPEG2000
ProvinceBritish Columbia
AreaKyklo Creek; 2
Lat/Long WENS-121.5000 -121.0000 58.7500 58.5000
Subjects9; surficial geology/geomorphology; glacial deposits; glaciofluvial deposits; tills; alluvial deposits; fluvial deposits; organic deposits; glacial features; glacial landforms; moraines; glacial history; glaciolacustrine deposits; colluvial deposits; Laurentide Ice Sheet; Cenozoic; Quaternary
Released2009 04 28
AbstractKyklo Creek (NTS 94I/11) map area was inundated by the Laurentide Ice Sheet during the late Wisconsinan glaciation (ca. 25 000 - 10 000 years ago). A thick blanket of clay and fine-silt-rich till was deposited by westward flowing ice across most of the region; glacial flow direction is depicted by west and southwestward-oriented flutings that also exhibit a rotation of flow around a bedrock-cored upland situated in the northeast part of the map. The area is dominantly flat, and covered extensively by bog and fen deposits. Thick peat accumulations (>2-3 m) locally form hummocky surfaces, accentuated by thermokarst (melt) of underlying discontinuous permafrost (units O1k, Ok). Hummocky till, including patterns interpreted to represent controlled moraines and crevasse-squeeze ridges lie only a few metres above the surrounding wetlands, and are typically covered by an aspen-dominated Boreal forest cover. Prominent ice-marginal channels that formed during regional deglaciation are depicted in the northwest part of the map area. There, a small glaciofluvial fan (unit Gf) provided a local aggregate source (now exhausted). It is likely that other such deposits occur in similar geographic associations, however, the ability to detect them is greatly limited by the extensive wetland and forest cover, in addition to the general difficulty accessing this terrain. Outcrops of Shaftesbury Formation shale bedrock are found in the northeast part of the map area. Only a thin till veneer mantles this bedrock-cored upland in contrast to the rest of the map area where borrow pits expose thickness of till >4-10 m.