AND 



Atolls hy 



rONTENTS 



CH. 13. Continental Shelf and Slope (Continental Margin) by 

 A. Guilcher .... 



1. Definitions .... 



2. Topography of the continental shelf 



3. Topography of the continental slope 



4. Structure and origins of the continental margins 



5. Conclusion ....... 



CH. 14. Abyssal Plains by Bruce C. Heezen and A. S. Laughton 



1. Introduction ..... 



2. Regional description 



3. Trench abyssal plains 



4. Archipelagic plains 



5. Abyssal gaps, interplain channels, mid-ocean canyons and deep- 

 sea channels ..... 



6. Sediments on the abyssal plains . 



7. Geophysical characteristics . 



8. Theories of the origin of the abyssal plains 



CH. 15. Oceanic Islands, Seamounts, Guyots 

 H. W. Menard and H. S. Ladd 



1. Introduction 



2. Oceanic islands . 



3. Seamounts 



4. Guyots 



5. Atolls 



6. Submerged atolls 



7. Oceanic volcanoes in geological time 



8. Importance of islands and seamounts 



CH. 16. The Mid-Oceanic Ridge by Bruce C. Heezen and Maurice Eiving 



1. Introduction 



2. North Atlantic . 



3. South Atlantic . 



4. Indian Ocean 



5. Indian and South Pacific Oceans 



6. Iceland and the Norwegian Sea 



7. Ai'ctic Basin 



8. Crustal structure 



9. Origin .... 



CH. 17. Trenches by R. L. Fisher and H. H. Hess 



1. Previous work . 



2. Topography of trenches 



3. Structure of trenches 



CH. 18. MiCROTOPOGRAPHY by A. S. Laughton 



1. Introduction .... 



2. Classification of microtopographic features 



CH. 19. Underwater Photography by H. E. Edgerton 



1. Introduction ..... 



2. Camera details ..... 



3. Cables and winches for cameras . 



XUl 



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