The Labrador ice-sheet did not cover the whole of eastern America north of New York, since the Torngat region, in northeastern Labrador, and the Shickshock Mountains, in Gaspe, escaped and remained as driftless areas. On the other hand, in places the ice-sheet passed beyond the present eastern edge of the continent, covering part of the shallow sea bottom along the coast of Labrador and occupying most, if not all, of the present Gulf of Saint Lawrence. On the western side the ice-sheet at its greatest extent filled the basins of Hudson and James bays, thus meeting the Keewatin sheet. Just how far it extended southwest is not quite certain, its relations to the Patrician sheet described by Tyrrell being still only imperfectly known. The island of Newfoundland is believed to have been an independent glacial center, adjoining the Labrador sheet on the east.

That the summits of the Torngat Mountains, . . .

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