298 



EARTH FEATURES AND THEIR MEANING 



northern North America and 

 in northern Europe, the em- 

 bossments of the ice ; domes 

 being located in Canada and 

 in Scandinavia respectively 

 (Fig. 322). There appears to 

 have been at this time no ex- 

 tensive glaciation of the south- 

 ern hemisphere, though in the 

 next earlier of the known great 

 periods of glaciation the so- 

 called Permo-Carboniferous it was the southern hemisphere, and 

 not the northern, that was affected (Fig. 323 and Fig. 304, p. 276). 



FIG. 323. Glaciated granite bowlder 

 which has weathered out of a moraine 

 of Permo-Carboniferous age upon which 

 it rests. South Australia (after How- 

 chin). 



FIG. 324. Map to show the glaciated and nonglaciated regions of North America 

 (after Salisbury and Atwood). 



