| Title | Reconnaissance surficial geology, Brichta Lake, Nunavut, NTS 76-P |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Kerr, D E |
| Source | Geological Survey of Canada, Canadian Geoscience Map 449, 2022, 1 sheet, https://doi.org/10.4095/329670  Open Access |
| Links | Surficial geology map collection
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| Links | Collection de données de géologie de surface
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| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, sediments, landforms, features, 1:125,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 13 (NAD83) |
| Media | on-line; digital |
| Related | This publication is related to the following publications |
| File format | readme
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| File format | pdf; 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) |
| Province | Nunavut |
| NTS | 76P |
| Area | Brichta Lake |
| Lat/Long WENS | -106.0000 -104.0000 68.0000 67.0000 |
| Subjects | surficial 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 |
| Illustrations | location maps; index maps; aerial photographs |
| Program | Climate Change Geoscience Coastal Infrastructure |
| Released | 2022 11 24 |
| Abstract | Preliminary 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. |
| GEOSCAN ID | 329670 |
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