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TitleQuaternary geology of the Inman River area, Northwest Territories
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AuthorSt-Onge, D A; McMartin, I
SourceGeological Survey of Canada, Bulletin 446, 1995, 68 pages (1 sheet), https://doi.org/10.4095/203578
Year1995
PublisherNatural Resources Canada
Documentserial
Lang.English
MapsPublication contains 1 map
Map Info.surficial geology, 1:250,000
ProjectionUniversal Transverse Mercator Projection
Mediapaper; on-line; digital
RelatedThis publication contains St-Onge, D A; McMartin, I; (1994). Surficial geology, Inman River, district of Mackenzie, Northwest Territories, Geological Survey of Canada, "A" Series Map no. 1846A
File formatpdf
ProvinceNunavut
NTS87B; 87C/01; 87C/02; 87C/03; 87C/04; 87C/05; 87C/06; 87C/07; 87C/08; 87A/02; 87A/03; 87A/04; 87A/05; 87A/06; 87A/07; 87A/10; 87A/11; 87A/12; 87A/13; 87A/14; 87A/15; 87D/02; 87D/03; 87D/04; 87D/05; 87D/06; 87D/07
AreaInman River; Bluenose Lake; Coronation Gulf; Harding River; Lambert Island; Camping Island
Lat/Long WENS-120.0000 -113.7500 69.4167 68.0000
Subjectssurficial geology/geomorphology; geochronology; lithology; glacial striations; pingos; drumlins; eskers; moraines; glaciofluvial deposits; glaciolacustrine deposits; marine deposits; tills; alluvial deposits; Wisconsinian Glacial Stage; glacial stages; glacial deposits; landforms; deglaciation; ice movement directions; radiocarbon dates; radiometric dates; lithofacies; facies; Phanerozoic; Cenozoic; Quaternary
Illustrationssketch maps; cross-sections; stratigraphic columns; photographs; aerial photographs; rose diagrams; analyses
ProgramPolar Continental Shelf Program
Released1995 05 01; 2016 09 12
AbstractThe Inman River area south of Dolphin and Union Strait includes lowlands, scarps, and tableland on nearly horizontal strata of Palaeozoic carbonates, mostly dolomite, north of the Middle to Late Proterozoic Coppermine Homocline rocks. The Late Quaternary, mostly Wisconsinan, sediments which unconformably overlie the dolostone are associated with a spectacular array of landforms including several types of moraines, a wide variety of drumlins, eskers, kames, and flights of marine beaches. Varying flow patterns resulting from increased topographic control during the waning phases of glaciation are reflected in the orientation of moraine ridges, drumlins, grooves, and striae. Periglacial processes are responsible for a series of landforms including the unique Harding River rock pingo, numerous rock mounds, blowout and dune fields, as well as pattern ground.
Concurrently with ice retreat, marine incursion imposed its own constraints on sedimentation and erosion patterns. Initially, marine basins confined between ice lobes and uplands received vast quantities of sediments entrained by meltwater from stagnant ice on upland surfaces and from subglacial streams debouching at ice fronts calving into the ocean. This episode of sedimentation was of short duration; the disappearance of stagnant ice brought it to a close.
Late Wisconsinan ice started to melt back from the eastern slopes of the upland just west of Bluenose Lake around 12 000 BP. Deglaciation from this position to Coronation Gulf has been divided into four phases defined by distinct flow patterns identified from drumlins, flutings, and striae, and by ice frontal positions marked by morainic ridges and other ice contact features.
GEOSCAN ID203578