ABSTRACT: Les moraines ' du massif Algonquin, Ontario, au début du Dryas recent, et corrélation avec la Moraine de Saint-Narcisse. [Moraines of the Algonquin massif, Ontario, Younger Dryas, and correlation with the Saint-Narcisse Moraine].

CGRG Bibliography of Canadian Geomorphology
Search Results

Author :

Date :

Title :

Publication :

Issue :

Page(s) :

Abstract

The systematic mapping of the major and minor moraines in the Algonquin Provincial Park area, by analyses of large scale air photos and field surveys, allows the correlation of more than 150 discontinuous elements of glacial margin which can be grouped into three regional morainic alignments as referred to Algonquin I, II and III, laid down on a 20 km wide strip oriented WNW-ESE. These morainic alignments are older than the Genesee Moraine, located southeast of Lake Nipissing, and also older than the discharges of glacial Lake Algonquin towards the Champlain Sea through the White Partridge, Fossmill and Sobie-Guilmette outlets. Laterally, they are correlated with morainic positions A, B and BC of the Outaouais lobe. The Algonquin III-Outaouais BC morainic alignment, which can be followed for almost 250 km in Ontario, is correlative to the east with the 750 km long Saint-Narcisse Moraine in Quebec, dated between 10 700 and 10 500 BP (12.7-12.4 cal ka). To the west, north of Lake Huron, the above alignment is probably contemporaneous with the Whiskey Lake Moraine. This hypothesis allows to approximate the position of the Laurentide Ice Sheet margin for another 400 km in Ontario, during the major stand at the onset of the Younger Dryas in Quebec, which corresponds to the Saint-Narcisse Moraine.

Bibliography of Canadian Geomorphology