Ice-Flow Chronology and Palimpsest, Long-Distance Dispersal of Indicator Clasts, North of the St. Lawrence River Valley, Quebec
Document generated on 09/26/2021 6:31 p.m. Géographie physique et Quaternaire Ice-Flow Chronology and Palimpsest, Long-Distance Dispersal of Indicator Clasts, North of the St. Lawrence River Valley, Quebec Séquence d’écoulements glaciaires et dispersion lointaine d’erratiques distinctifs au nord de la vallée du Saint-Laurent, Québec Jean J. Veillette Glacial History, Paleogeography and Paleoenvironments in Glaciated Article abstract North America An ice flow model, based on the distribution of distinctive Proterozoic erratics Volume 58, Number 2-3, 2004 from the Lake Mistassini and Monts Otish sedimentary basins, and on the mapping of relict striations in a 230 000 km2 area located predominantly in URI: https://id.erudit.org/iderudit/013138ar Grenville Province, Québec, is presented to reconstruct the evolution of a large DOI: https://doi.org/10.7202/013138ar part of the Labrador Sector of the Laurentide Ice Sheet during the Wisconsinan. The results, were added to those of similar surveys carried out in the Abitibi region, and further north. Striated surfaces and indicator clasts See table of contents from an early northwestward flow, overprinted by those from a widespread southeastward flow, and lastly by those from deglaciation flows toward the southwest, south, and southeast, revealed a complex sequence of events. The Publisher(s) northwestward flow originated from a NE‑SW, early Wisconsinan, ice divide located in the Québec highlands, south of Lake Mistassini, that migrated to a Les Presses de l'Université de Montréal position north of the lake, at the Last Glacial Maximum, to give rise to the widespread, southeastward ice flow, that left traces over a large part of ISSN Grenville Province.
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