SUBMARINE MOUNTAINS 91 



land Cordilleras in being arcuate. Like each of them it has a 

 ground-plan convex toward the ocean. Again, like them, it 

 has a "fore-deep," part of which is shown with submarine con- 

 tours or isobaths drawn on the map in Figure 53. The contour 



INDIA N 



O C E A N 



400 STATUTE MILES 



FIGURE 53. MAP OF THE JAVA DEEP AND THE TROUGH INSIDE THE CURVE 

 OF THE EAST INDIAN "NEGATIVE STRIP." 



intervals are stated in meters. South of Java the "negative 

 strip" follows a continuous submarine ridge, inside of which is 

 a trough that bears deeper water and lies between that ridge 

 and Java itself. In principle the trough seems to correspond 

 well with the basin occupied by the Banda Sea farther east, as 

 well as with the "back-deeps" represented by the Sea of Japan 

 inside the Japanese arc, and by the analogous sea inside the Loo 

 Choo arc farther south. 



At first sight it might look as if the seventh test for the 



