Title Surficial geology, Kyklo Creek, British Columbia
Author Smith, I.R.
Source Open-File Report - Geological Survey of Canada, No.5307 1 disc. Publisher: Geological Survey of Canada, Calgary, AB, Canada
Publication Date 2009
Notes In English. Accessed on Aug. 12, 2011 GeoRef Acc. No: 309757
Index Terms alluvium; glacial geology; maps; Quaternary deposits; sediments; Canada-- British Columbia; British Columbia; Canada; Cenozoic; clastic sediments; colluvium; fluvial features; glacial features; glacial geology maps; Kyklo Creek; lacustrine features; Laurentide ice sheet; moraines; Quaternary; surficial geology; till; Western Canada
Abstract Kyklo Creek (NTS 94I/11) map area was inundated by the Laurentide Ice Sheet during the late Wisconsinan glaciation (ca. 25000- 10000 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.
URL http://apps1.gdr.nrcan.gc.ca/mirage/mirage_list_e.php?id=247302
Publication Type map
Record ID 65006355