| Title | Predictive surficial geology, Washburn Lake area, Victoria Island, Nunavut, NTS 77-E and 77-F east |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Sharpe, D R ;
Lesemann, J -E; Parkinson, W; Armstrong, L; Dods, E |
| Source | Geological Survey of Canada, Canadian Geoscience Map 172, 2018, 2 sheets, https://doi.org/10.4095/295701  Open Access |
| Links | Surficial geology map collection
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| Links | Collection de données de géologie de surface
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| Image |  |
| Image |  |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | 2 maps |
| Map Info. | surficial geology, remote predictive materials, 1:250,000 |
| Projection | Lambert Conformal Conic Projection, UTM zone 13 (NAD83) |
| Media | digital; on-line |
| Related | This publication is related to the following
publications |
| File format | readme
|
| File format | pdf; rtf; xml; xls; shp |
| Province | Nunavut |
| NTS | 77E; 77F/01; 77F/02; 77F/07; 77F/08; 77F/09; 77F/10; 77F/15; 77F/16 |
| Area | Victoria Island; Washburn Lake |
| Lat/Long WENS | -112.0000 -104.0000 71.0000 70.0000 |
| Subjects | surficial geology/geomorphology; remote sensing; glacial deposits; landforms; terrain types; glacial landforms; vegetation; soil moisture; glacial features; eolian deposits; colluvial deposits; alluvial
deposits; marine deposits; lacustrine deposits; glaciomarine deposits; glaciolacustrine deposits; glaciofluvial deposits; tills; Cenozoic; Quaternary |
| Program | GEM2: Geo-mapping for Energy and Minerals Rae Province Project Management |
| Released | 2018 06 04 |
| Abstract | The predictive surficial geology map combines remotely predicted map and visually interpreted imagery from LANDSAT and SPOT data. Machine-automated classification was integrated with landform and
regional ground-truth data. The tonal character of spectral data, moisture content, controlled by sediment texture, topographic position, vegetation, and material thickness is mapped by machine methods. Visual analysis of terrain form, with expert
knowledge, reveals a series of crosscut streamlined flow fields that record a complex glacial history, including glaciolacustrine and marine limit water plains. Scoured bedrock in an east-west flow field indicates that it is an erosional terrain that
bifurcates a high area of thick, ice-cored, hummocky terrain. Remotely predicted map methods are efficient, accurate, and save time in mapping spectral details on the ground surface, allowing the geologist more time in developing the essential
geological models of glaciated terrain. This publication includes the predictive surficial geology data in two formats: Sheet 1, raster (~75%)/vector (~25%), and Sheet 2, vector. |
| Summary | (Plain Language Summary, not published)
This 1: 250K surficial geology map of Washburn Lake, eastern Victoria Island, represents a new mapping method that integrates automated mapping of
satellite imagery, and, traditional interpretive mapping by a geologist from imagery (air and satellite photographs). Satellite images record spectral tone or moisture variation used to classify terrain types. Automated classification is aided by
training areas that incorporate terrain analysis used by photograph interpreters (geologist). These include mapping materials based on visual characteristics (mainly affecting moisture content), such as; tone, texture, size, shape, pattern, and other
terrain features. The tonal character of moisture content, controlled by sediment texture, topographic position, vegetation, and material thickness, is most efficiently mapped by machine methods. Visual identification of landforms along with expert
field-based knowledge reveal a widespread series of cross-cutting flow fields that record the complex glacial history of eastern Victoria Island, including ancient lake and marine limit water plains. |
| GEOSCAN ID | 295701 |
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