128 



MAN AND THE GLACIAL PERIOD. 



island of Chiloe he found embedded in " hardened mud " 

 boulders which must have come from the mountain-chains 

 of the continent. Agassiz also observed unquestionable 

 glacial phenomena on various parts of the Fuegian coast, 

 and indeed everywhere on the continent south of latitude 

 37°. Between Concepcion and Arauco, in latitude 37°, 

 Agassiz observed, near the sea-level, a glacial surface well 

 marked with furrows and scratches, and as well preserved, 

 he says, " as any he had seen under the glaciers of the 

 present day." 



Fig. 39.— Quartzite boulder of 45 cubic metres, on Mont Lachat, 800 metres above 

 the valley of the Belley, in Ain, France (Falsan). 



