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The sedimentary record of drifting ice (early Wisconsin Sunnybrook deposit) in an ancestral ice-dammed Lake Ontario, Canada

Auteurs :
EYLES, N.
EYLES, C.H.
WOODWORTH-LYNAS, C.
RANDALL, T.A.

Description :
Outcrops of pebbly mud (diamict) at Scaborough in Southern Ontario (the so-called Sunnybrook Till) are associated with the earliest incursion of the Laurentide Ice Sheet (LIS) into mid-continent North America some 45,000 years ago. The Sunnybrook is a blanket-like deposit containing deepwater ostracodes and occurs conformably within a thick (100 m) succession of deltaic and glaciolacustrine facies that record water depth changes in a large proglacial lake. The data indicate an ancestral early-mid Wisconsin Laurentide Ice Sheet that was much smaller than its late Wisconsin counterpart.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2005, vol. 63, n°. 2, p. 171-181, nombre de pages : 11, Collation : Illustration, Références bibliographiques : 60 ref.

Date :
2005

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier

Langue :
Anglais
Droits :
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