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Drumlins, subglacial meltwater floods, and ocean responses

John Shaw
Drumlins, subglacial meltwater floods, and ocean responses
Geology (Boulder) (September 1989) 17 (9): 853-856

Abstract

Drumlins and erosional marks in bedrock give evidence for broad, subglacial meltwater floods that have discharge-rate estimates of about 10 (super 6) m (super 3) /s. Similar discharge rates are obtained for other late glacial catastrophic floods. The total volume of meltwater that is thought to have formed the Livingstone Lake, Saskatchewan, drumlin field is estimated at 8.4 x 10 (super 4) km (super 3) . This volume is equivalent to a eustatic rise of 0.23 m in global sea level. Meltwater release and roughly contemporaneous formation of drumlin fields in North America and Europe could have involved several metres of sea-level rise in a few years. The implications of such floods for the generation of myths and the interpretation of the oxygen isotopic record of the oceans are discussed. High meltwater discharges are of potential importance to the generation of a lid of cold, fresh water over the North Atlantic and its effects on late glacial climate.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 17
Serial Issue: 9
Title: Drumlins, subglacial meltwater floods, and ocean responses
Author(s): Shaw, John
Affiliation: Queen's Univ., Dep. Geogr., Kingston, ON, Canada
Pages: 853-856
Published: 198909
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 27
Accession Number: 1989-062824
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N00°00'00" - N75°00'00", W80°00'00" - E20°00'00"
N60°00'00" - N84°00'00", W136°00'00" - W102°00'00"
N49°00'00" - N60°00'00", W110°00'00" - W101°19'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1989
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