XIV 



CONTENTS 



CH. 20. SrioiARiNE Canyons hij F. P. Shepard 



1. Introduction ..... 



2. Classification of submarine valleys 



3. Canyon descriptions .... 



4. East coast U.S. (New England type) canyons 



5. Trough-shaped valleys 



6. Delta foreset-sloj)e gullies 



7. Shallow straight-walled valleys of submarine escarpment^ 



8. Origin of submarine canyons 



9. Subaerial erosion .... 

 10. Pleistocene canyon cutting by turbidity currents 



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 480 

 481 

 492 

 493 

 494 

 496 

 496 

 50(» 

 504 



Section III. Sedimentation 



CH. 21. Beach and Nearshore Processes 



Part i. mechanics of marine sedimentation by R. A. Bagnold 

 1. Definition, origin and relevant physical properties 



Transport during fall through the sea . 



Transport of sediment over the sea bed 



Transport rate and fluid '"power". 



Auto-suspension of sediment: turbidity currents, etc 



Wave drift ...... 



Threshold of bed disturbance by fluid action . 



PAET II. LITTORAL PROCESSES by D. L. Inmau and R. A. Bagnold 



8. Introduction . . . . 



9. Littoral profile: two-dimensional case . 



10. Migration of sand grains by wave action 



11. Littoral processes: three-dimensional case 



12. Discussion ....... 



2. 

 3. 

 4. 

 5. 

 6. 

 7. 



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507 



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 .509 

 512 

 518 

 522 

 525 



529 

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 537 

 540 

 549 



CH. 22. Shallow- Water Carbonate Sediments by R. N. (iinsburg, 

 R. Michael Lloyd, K. W . Stockman and J. S. McCaUum 



1. Introduction ...... 



2. Types of skeletal particles .... 



3. Skeletal particles in sediments 



4. Distribution of skeletal particles . 



5. Discussion of the distribution of skeletal particles 



6. Non- skeletal particles ..... 



7. Distribution of non-skeletal particles 



554 



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 573 

 578 



CH. 23. Basin Sedimentation and Diagenesis by I. R. Kaplan and 

 S. C. Rittenberg ........ 



1. Introduction ........ 



2. Physical aspects of sedimentation .... 



3. Diagenesis in sediments ...... 



4. Isotopic studies related to biological processes in sediments 



5. Special problems ....... 



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