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TitleSurficial geology, June Lake, British Columbia
AuthorBednarski, J M
SourceGeological Survey of Canada, Open File 5480, 2008, 1 sheet; 1 CD-ROM,
Documentopen file
Maps1 map
Map Info.surficial geology, surficial materials and landforms, 1:50,000
Mediapaper; CD-ROM; digital; on-line
File formatreadme / lisez-moi
File formate00 (ESRI® ArcExplorer(TM) v. 2.0 is included / est fourni); shp; tif; pdf; JPEG2000
ProvinceBritish Columbia
AreaJune Lake; Thinahtea Creek; Calendar Creek
Lat/Long WENS-120.5000 -120.0000 60.0000 59.7500
Subjectssurficial geology/geomorphology; glaciation; deglaciation; postglacial deposits; glacial deposits; proglacial deposits; glaciolacustrine deposits; proglacial lake deposits; glaciofluvial deposits; ice margins; ice contact deposits; outwash; outwash plains; outwash deltas; outwash fans; meltwater channels; kettles; colluvial deposits; mass wasting; landslide deposits; slumps; solifluction; alluvial deposits; flood plains; lacustrine deposits; fluvial deposits; terraces; deltaic sediments; alluvial fans; alluvium; organic deposits; peat bogs; swamps; fens; hummocks; permafrost; ground ice; thermokarst; sands; gravels; silts; clays; glacial features; glacial landforms; tills; drumlins; erratics; carbonate rocks; glacial flutings; moraines; till ridges; eskers; crevasses; ice movement directions; sedimentary rocks; sandstones; shales; glacial stages; Wisconsinian glacial stage; paleotopography; shoreline changes; Dunvegan Formation; Fort St. John Group; Shaftesbury Formation; Laurentide Ice Sheet; Phanerozoic; Cenozoic; Quaternary; Mesozoic; Cretaceous
Natural Resources Canada Library - Ottawa (Earth Sciences)
Natural Resources Canada library - Calgary (Earth Sciences)
Geological Survey of Canada (Atlantic)
Natural Resources Canada library - Vancouver (Earth Sciences)
Natural Resources Canada library - Québec (Earth Sciences)
ProgramTargeted Geoscience Initiative (TGI-2), 2003-2005
LinksMetadata - Métadonnées
Released2008 04 01
AbstractThe surficial geology of the June Lake (NTS 94 P/16) map area is dominated by the effects of continental glaciation during the Late Wisconsinan stage (ca. 25 000-10 000 years ago). In general the ice sheet advanced from the northeast, but as the ice thinned during deglaciation, the flow emanated from the Mackenzie River valley from the north-northwest. This ice flow was caused by a lobe in the ice sheet that filled a broad lowland, centered down the east half of the map area. The central axis of the lowland is occupied by a large meltwater channel in which Thinahtea Creek, and a string of small lakes, currently lie. Several eskers also run along the channel floor, which suggest that the channel may have initially formed as a subglacial tunnel. The lobate pattern of the ice margin is marked by numerous small ridges of till, which form nested arcuate patterns. The ridges are thought to be either end moraine segments or crevasse fillings and their arcuate is thought to show the progressive retreat of the ice margin to the northwest, when considered with the nested pattern of meltwater channels. Much of the map area is underlain by thick clayey till, which is poorly drained and covered by extensive muskeg, which forms hummocky peatlands. Areas of thick peat are likely underlain by permafrost and probably contain significant amounts of ground ice.