322 



A. P. COLEMAN THE LABRADOR ICE-SHEET 



the work of glacial ice on the Magdalen Islands^ in the form of sandy 

 till with well striated stones, up to an elevation of 105 feet. Above this 

 hills of loose basaltic blocks rise to 360 feet in places, showing no evidence 

 that a great ice-sheet ever passed over them. The islands seem too small 

 and low to have formed an independent glacial center, and it is probable 

 that the thin southeastern margin of the Labrador ice-sheet inclosed them 

 without crossing the hilltops. If so, the thickness of the sheet at this 

 point can not have been more than about 200 feet. Whether the fee, 

 perhaps with its edge afloat, reached Cabot Straits between Newfound- 

 land and Cape Breton is uncertain. 



ScaJ4yo^ 'h^^Jj^ 



Figure 2. — Map of Gaspe in the Ice Age 

 Driftless area shaded. 



It was thought by Chalmers that the eastern end of Prince Edward 

 Island was unglaciated ; but I have found undoubted till with well striated 

 stones at Souris, proving that land ice covered at least the lower ground.^ 

 The central part of the island has not furnished evidence of the action 

 of land ice, but the west end is more or less covered with boulder-clay 

 containing blocks derived from the mainland. There are no hills rising 

 much above 311 feet (Wiltshire station, highest railway point on the 



3 J. W. Goldthwait : Geol. Survey of Canada. Museum Bull. No. 14, 1915. 

 A. P. Coleman : Glacial history of Prince Edward Island and the Magdalen Islands. 

 Roy. Soc. Canada, 1919. 



