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TitleSurficial geology, Kimea Creek, British Columbia
AuthorBednarski, J M
SourceGeological Survey of Canada, Open File 5505, 2007, 1 sheet; 1 CD-ROM, (Open Access)
LinksMetadata - Métadonnées
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; JPEG2000
ProvinceBritish Columbia
AreaKimea Creek; Petitot River
Lat/Long WENS-121.0000 -120.5000 59.7500 59.5000
Subjectssurficial geology/geomorphology; glacial deposits; glaciolacustrine deposits; glaciofluvial deposits; tills; alluvial deposits; fluvial deposits; lacustrine deposits; colluvial deposits; organic deposits; glacial features; glacial landforms; moraines; glacial history; Wisconsinan Glaciation; Cenozoic; Quaternary
ProgramNorthern Resources Development Program
Released2007 10 01
AbstractKimea Creek (NTS 94P/10) map area was glaciated by the Laurentide Ice Sheet during the Late Wisconsinan (ca. 25 000-10 000 years ago), which deposited clayey till over most of the area. Glacially streamlined landforms in the northwest quadrant show that the main ice flow was from the northeast. However, most of the area is flat and boggy, with peat accumulations of 2 to 3 m, which locally form hummocky surfaces underlain by discontinuous permafrost. Till is usually found underlying broad forested uplands, which commonly lie only a few metres above the surrounding wetlands. Numerous small moraines and crevasse-fill ridges mark the pattern of glacial retreat and minor readvances. These probably formed when the ice sheet thinned and the ice margin became lobed. During deglaciation, when the ice margin retreated to the northeast, meltwater was routed westward between the ice margin and gradually rising topography to the south. Several large meltwater channels were cut at this time. The southern channels are relatively older than the ones to the north. One of the largest meltwater channels lies in the southern part of the map area, which is currently occupied by Kimea Creek and lower Sahdoanah Creek. This channel was the main drainage when the Petitot River to the north was still covered by ice and the most significant glaciofluvial deposits in the map area are found within its banks. With subsequent ice retreat, younger meltwater channels were cut further northward. The northernmost one is currently occupied by the modern Petitot River.