GLACIAL FEATURES OF TANQUARY FIORD AND ADJOINING AREAS OF NORTHERN ELLESMERE ISLAND, N. W. T.

The results of the present study support the conclusion that the former ice cover of northern Ellesmere Island was very much more extensive than the present, although the age of maximum glaciation is not known. In the Tanquary Fiord area the conclusion is based on: bathymetric data indicating consid...

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Bibliographic Details
Main Author: Hattersley-Smith,G.
Other Authors: DEFENCE RESEARCH TELECOMMUNICATIONS ESTABLISHMENT OTTAWA (ONTARIO)
Format: Text
Language:English
Published: 1968
Subjects:
Snow
Ice and Permafrost
(*GLACIERS
ELLESMERE ISLAND)
ICE
EROSION
RIVERS
TERRAIN
DRAINAGE
THICKNESS
DEPOSITS
ROCK
SILT
MOUNTAINS
LAKES
STRATIGRAPHY
BATHYTHERMOGRAPH DATA
CANADA
MORAINES
PEAT
TANQUARY FIORD(CANADA)
Canada
Ellesmere Island
Glacial Lake
Tanquary Fiord
glacier*
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0689115
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0689115
Description
Summary:The results of the present study support the conclusion that the former ice cover of northern Ellesmere Island was very much more extensive than the present, although the age of maximum glaciation is not known. In the Tanquary Fiord area the conclusion is based on: bathymetric data indicating considerable overdeepening of the fiords; morphology of the main valleys; and the presence of moraines, erratics and glacial lake deposits at high levels. Tanquary Fiord became free of glacial ice at least 6,500 years ago and peat was forming in the valleys by this time. A long period of river erosion followed the main retreat of the ice. Subsequently, and within the last 4,000 years, glaciers advanced to re-occupy V-shaped valleys, and at the same time small ice caps were probably regenerated. In the last 900 years, however, there has been little change in the terminal position of most of the major glaciers, which appear to be advancing slightly, although in the last 40 years the side glaciers have receded from well-marked terminal moraines. (Author)

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