32 



PHYSIOGRAPHIC GEOLOGY. 



Hawaii two summits nearly 14,000 feet in altitude ; and if the 

 ocean around is 15,000 feet deep, the whole height of these peaks 

 is just that of Mount Everest in the Himalayas. 



Between these groups lie the islands of the ocean, all nearly 

 parallel in their courses. Figs. 25, 26 are examples. 



Fig. 26. 



Fig. 25. 



, 



\ 



io° S 



Go 



140 





16°5 150° 





'+1° ■ 





The following table gives the courses of the principal chains of the ocean 



Course. 



Hawaian range * N. 64° W. 



Marquesas Islands N. 60° W. 



Paumotu Archipelago N. 60° AY. 



Tahitian or Society N. 62° W. 



Hervey Islands N. 65° W. 



Samoan or Navigator Islands N. 68° W. 



Tarawan or Kingsmill Islands N. 34° W. 



Ralick group N. 37° W. 



Radack group N. 30° W. 



New Hebrides N. 40° W. 



New Caledonia N. 44° W. 



North extremity of New Zealand N. 50° W. 



Salomon Islands N. 57° W. 



Louisiade group N. 56° W. 



New Ireland N. 65° W. 



B. Northeasterly system of trends. — The body of New Zealand 

 has a northeast-by-north course. The line is continued to the south, 

 through the Auckland and Macquarie Islands, to 58° S. To the 

 north, in the same line, near 30° S., lie the Kermadec Islands, and 

 farther north, near 20° S., the Tonga or Friendly Islands. 



The Ladrones, north of the equator, follow the same general 

 course. It also occurs in many groups of the northwesterly system 

 characterizing subordinate parts of those groups. Thus, the west- 

 ernmost of the Hawaian Islands, Nihau, lies in a north-northeast 

 line, and the two lofty peaks of Hawaii have almost the same 

 bearing. 



