the 



H i m a - 

 lay as or 

 Andes: the 

 difference i s 

 that these ele- 

 vations are not 

 true mountains 

 but volcanic peaks, 

 sometimes isolated, 

 again accumulated 

 in long narrow ^^ 



ridges, but all made 

 up of matter poured out from 

 craters or through great fis- 

 sures in the crust. So numer- 

 ous are these heaped masses 

 of lava and other ejections 

 from these vents, that there 

 is hardly any considerable 

 area of the oceans where they 

 do not rise above the surface; 

 there are indeed thousands 

 of these volcanic peaks dis- 



H' - \.l'-'^'>"'.f"~ ' 



Suggestions concer 



Coral Reefs, 



and Volcanic Islands 



In the foreground the upward growth and lateral enlarge- 

 ment of volcanic cones is indicated. The largest of these 

 . , has been levelled off and occupied by an atoll. Inthedis- 



tributecl from pole to pole. tancc a volcano, stlll active, is in a state of slight eruption. 



