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TitleReconnaissance surficial geology, Calder River, Northwest Territories, NTS 86-F
DownloadDownloads
AuthorKerr, D E; O'Neill, H B
SourceGeological Survey of Canada, Canadian Geoscience Map 389, 2019, 1 sheet, https://doi.org/10.4095/313519 (Open Access)
Image
Year2019
PublisherNatural Resources Canada
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, sediments, landforms, features, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 11 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf; rtf; gdb; shp; xml; mxd
ProvinceNorthwest Territories
NTS86F
AreaCalder River
Lat/Long WENS-118.0000 -116.0000 66.0000 65.0000
Subjectssurficial geology/geomorphology; postglacial deposits; organic deposits; eolian deposits; colluvial deposits; landslides; alluvial fans; glacial deposits; glacial landforms; glacial features; glacial lakes; ice contact deposits; tills; till ridges; moraines; moraine, end; moraine, ribbed; glacial flutings; glacial scours; kettles; terraces; scarps; meltwater channels; eskers; paleocurrents; beach ridges; drumlinoids; drumlins; crag and tail; kames; glacial striations; ice flow; permafrost; ground ice; periglacial features; thermokarst; silts; sands; gravels; boulders; clays; glacial history; glaciation; deglaciation; shoreline changes; isostatic rebound; depositional environment; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; photographs
ProgramGeological Map Flow, GEM2: Geo-mapping for Energy and Minerals
Released2019 05 15
AbstractThe glaciated landscape of the Calder River region exhibits striations, crag-and-tails, fluted bedrock, and pre-crag ridges which record generally westward ice flow during the last glaciation, locally superimposed on southwestward flow indicators from a prior ice-flow phase of the same glaciation. Glacially-scoured bedrock dominates the map area, but till veneer and till blanket occur in patches in the western regions. Glaciofluvial eskers, kames, and outwash plains are part of poorly defined meltwater corridors, ranging in orientation from northwestward to southwestward. During deglaciation, which began about 10.5 ka BP in the map area, a discontinuous line of recessional moraines was formed by ice retreating eastward. In the northeast map area, the moraines may represent the southern extension of the Forcier Moraine, whereas in the southeast, they may represent the northern extension of the Rebesca Moraine. Glaciolacustrine sediments associated with glacial Lake McConnell were deposited in the westernmost regions, up to 300 m elevation. Other unrelated, isolated glaciolacustrine deltas and beaches have also been observed further east, up to 385 m elevation.
Summary(Plain Language Summary, not published)
The Calder River map (NTS 86-F) identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial geology is based on aerial photograph interpretation, with striations from previous publications. This work provides new geological knowledge and improves our understanding of the distribution and nature of the surficial geology cover, and the glacial history of this region. It contributes to resource assessments and effective land use management.
GEOSCAN ID313519