36 



PHYSIOGRAPHIC GEOLOGY. 



21. 



of the chain is 500 miles. Neio Caledonia, more to the southwest, has 

 approximately the same course, — about northwest. Between New Hebrides 



and New Caledonia lies another jjarallel 

 line, the Loyalty Gi'oup. The Solomon 

 Islands, farther northwestward, are also 

 a linear group. The chain is mostly a 

 double one, consisting of two parallel 

 ranges ; and each island is linear, like 

 the group, and with the same trend. 

 The course is northwest-by-west, the 

 length 600 miles. 



In the North Pacific, the Hawaiian 



155 



"w 





> 



H, Hawaii ; M, Maui ; 3, Kahoolawe ; 4, Lanai ; 

 5, Molokai; O, Oahu; K, Kauai. 



range has a west-northwest course. The 



Sandwich or Hawaiian Islands (Fig. 21), 

 from Hawaii to Kauai, make up the southeasterly part of the range, about 

 400 miles in length. Beyond this, the line extends to 175° E., making 

 a total length of about 1500 miles, — a distance as great as from New 

 York to the Great Salt Lake in the Eocky Mountains, or from London to 

 Alexandria. 



22. 



23. 



\ 



10° S 



a o 



140 





4fif^ 



-i&o; 



.o 





w- 





Between these groups lie the islands of mid ocean, all nearly parallel in 

 their courses. Figs. 22, 23 are examples. 



The f ollowiug table gives the courses of the principal chains of the ocean : — 



Course. 



Hawaiian range N. 64° W. 



Marquesas Islands N. 60° W. 



Paumotu Archipelago N. 60° W. 



Tahitian or Society Islands N. 62° W. 



Hervey Islands N. 65° "W. 



Samoan or Navigators Islands '. . .N. 68° W. 



Gilbert, Tarawan, or Kingsmill Islands N. 34° W. 



EaUck group N. 37° W. 



Radack gi-oup N. 30° W. 



New Hebrides N. 40° W. 



New Caledonia N. 44° W. 



North extremity of New Zealand N. 50° W. 



Solomon Islands N. 57° W. 



Louisiade group N. 56° W. 



New Ireland N. 65° W. 



