GEOSCAN Search Results: Fastlink


TitleReconnaissance surficial geology, Brichta Lake, Nunavut, NTS 76-P
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 449, 2022, 1 sheet, Open Access logo Open Access
LinksSurficial geology map collection
LinksCollection de données de géologie de surface
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, sediments, landforms, features, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 13 (NAD83)
Mediaon-line; digital
RelatedThis publication is related to the following publications
File formatreadme
File formatpdf; rtf; gdb (ESRI® ArcGIS(TM) v.10.x); shp (ESRI® ArcGIS(TM) v.10.x); xml (ESRI® ArcGIS(TM) v.10.x); mxd (ESRI® ArcGIS(TM) v.10.x); xls (Microsoft® Excel® 2010)
AreaBrichta Lake
Lat/Long WENS-106.0000 -104.0000 68.0000 67.0000
Subjectssurficial geology/geomorphology; Nature and Environment; Science and Technology; permafrost; ground ice; periglacial features; thermokarst; ice-wedge polygons; patterned ground; felsenmeer; postglacial deposits; organic deposits; dunes; marine sediments; landslides; glacial deposits; glacial features; glacial landforms; ice contact deposits; eskers; tills; glacial scours; glacial flutings; kettles; meltwater channels; paleocurrents; beach ridges; moraines; drumlinoids; crag and tail; roches moutonnees; kames; glacial striations; sands; gravels; silts; clays; boulders; landforms; scarps; escarpments; glacial history; glaciation; ice flow; deglaciation; depositional environment; eolian sediments; alluvial sediments; alluvial floodplain sediments; alluvial terraced sediments; lacustrine sediments; marine beach sediments; marine deltaic sediments; marine littoral sediments; marine veneer; marine blanket; glaciomarine sediments; glaciomarine beach sediments; glaciomarine deltaic sediments; glaciomarine veneer; glaciomarine blanket; glaciofluvial sediments; glaciofluvial terraced sediments; esker sediments; hummocky tills; ridged tills, moraine; moraine complexes; streamlined tills; till veneer; till blanket; subglacial meltwater corridors; geological contacts; landslide escarpments; retrogressive thaw flows; thermokarst depressions; dune crests; gullied terrain; beach crests; moraine ridges; esker ridges; drumlinoid ridges; drumlin ridges; crag-and-tail ridges; pre-crag ridges; ice-flow directions; fluted bedrock; fluted drift; outcrops; station locations, remote observation; station locations, ground observation; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; aerial photographs
ProgramClimate Change Geoscience Coastal Infrastructure
Released2022 11 24
AbstractPreliminary surficial geology studies, based on air photo interpretation and limited legacy field data in the Brichta Lake map area, provide an understanding of the distribution and nature of surficial materials, and regional glacial history. The terrain is characterized by extensive glacial and meltwater scouring that has affected bedrock outcrops, and eroded hummocky and streamlined till, till blankets, and till veneers in the southwest regions. Streamlined bedrock and till landforms indicate ice flow towards the northwest and north-northwest during the last glaciation. Subglacial meltwater corridors and broader erosional zones, trending north-northwest, consisting of eskers, washed till veneer, ridged till, and scoured bedrock, result from late-phase ablation of the ice sheet during deglaciation. Glaciomarine and postglacial marine sediments extend discontinuously inland from the Queen Maud Gulf to 200 m a.s.l. elevation, notably up Tingmeak and Ellice rivers and their tributaries. In some eastern parts of the map area below 160 m a.s.l. elevation, thick marine deposits form plains that blanket broad shallow valleys.
Summary(Plain Language Summary, not published)
The map identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial geology is based on aerial photograph interpretation and limited legacy field work. This work provides new geological knowledge and improves our understanding of the distribution, nature and glacial history of surficial materials. It contributes to resource assessments and effective land use management.

Date modified: