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TitleSurficial geology, Lichen Creek, British Columbia
AuthorSmith, I R
SourceGeological Survey of Canada, Open File 5309, 2009, 1 sheet; 1 CD-ROM, (Open Access)
LinksMetadata - Métadonnées
Alt SeriesBritish Columbia Ministry of Energy, Mines and Petroleum Resources, Map 2009-4
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
AreaLichen Creek
Lat/Long WENS-121.5000 -121.0000 59.0000 58.7500
Subjectssurficial geology/geomorphology; glacial deposits; glaciofluvial deposits; tills; alluvial deposits; fluvial deposits; organic deposits; lacustrine deposits; glacial features; glacial landforms; moraines; glacial history; glaciolacustrine deposits; Cenozoic; Quaternary
Released2009 04 28
AbstractLichen Creek (NTS 94I/14) 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 across most of the region by westward flowing ice; glacial flow direction is depicted by flutings that show divergent flow directions around a bedrock headland in the southeast part of the map. Bedrock is also exposed beneath till veneer in a road cut and borrow pit in the north-central map area. Till exposures in regional borrow pits exhibit thicknesses >4 m, and the presence of clast-pavements and other unconformities suggests considerable thrusting and stacking of till sheets has occurred in this area. The area is flat to gently northward inclined, and is extensively blanketed by bog and fen deposits. Areas of hummocky peatland and thermokarst are present but generally less extensive here than in adjoining map areas; discontinuous permafrost conditions are likely to exist in the map area. Hummocky areas extending only a few metres above the regional organic terrain are covered by an aspen-dominated Boreal forest cover. Regional patterns of these forested-hummocks correlate with interpreted crevasse-squeeze ridges, and small, discontinuous recessional moraines that mark the east-southeastward retreat of ice. Lateral meltwater channels that run oblique and perpendicular across the bedrock-cored upland in the southern part of the map indicate that ice persisted to the south of the Lichen Creek map after the northern and central regions were deglaciated. No new granular aggregate resources were discovered in the map area, although the various galiofluvial terraces (Gt) in the northwest and along the Sahtaneh River may be candidates for field exploration. The esker complex in the northwest corner is comprised of almost entirely sand and therefore offers little aggregate potential. Bedrock exposed in the region is poorly consolidated Shaftesbury Formation shale, and similarly offers little granular aggregate potential.