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TitleRaised Marine Features, Radiocarbon Dates, and Sea Level Changes, eastern Melville Peninsula, Arctic Canada
AuthorDredge, L A
SourceArctic vol. 44, no. 1, 1991 p. 63-73,
Alt SeriesGeological Survey of Canada, Contribution Series 10690
PublisherThe Arctic Institute of North America
Mediapaper; on-line; digital
File formatpdf
NTS46O/13; 46O/14; 46O/15; 46O/16; 47D/02; 47D/11; 47D/12; 47D/SW; 47A/SW; 47A/NW; 47A/10; 47A/15
AreaMelville Peninsula; Eastern Melville Peninsula
Lat/Long WENS -84.0000 -81.0000 70.0000 67.8333
Subjectsgeochronology; surficial geology/geomorphology; radiometric dates; radiocarbon dates; sea level fluctuations; climate; glacial history; glacial deposits; landforms; depositional environment; fossils; deglaciation; limestones; sedimentary rocks; raised beaches; gravels; marine deposits; transgressions; isostasy; littoral deposits; littoral environment; Foxe Basin; Mollusca; Invertebrata; Quaternary
Illustrationscharts; tables; photographs; sketch maps
Released1991 01 01
AbstractRadiocarbon dates from eastern Melville Peninsula indicate that deglaciation of western Foxe Basin occurred about 6900 years ago, although late ice persisted in an area northwest of Hall Lake and on the central plateau. Relative sea level was as high as 144 m above present at that time. Two new well-controlled sea level curves depict emergence as an exponential decay function. Marine limit elevations and nested curves indicate a major ice-loading centre in south-central Foxe Basin. These data and archaeological dates suggest a secondary recent rebound centre in the northern part of the basin. Flights of raised beaches, prevalent in the area, are composed of angular limestone fragments and suggest that frost-riving occurs in shallow foreshore environments. The prominent wash line near the marine limit suggests that Foxe Basin had less sea ice cover prior to 6000 years ago but that coastal processes have been similar to present since that time.

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