TABLE OF CONTENTS xxiii 



PAGE 



The Blue or Slate Colored Mud; The Red Mud; The Green 

 Mud; Green Sand; Table of Analyses of Glauconite from 



Various Horizons 668-670 



Deposits on Lee Banks and at the Edge of the Continental 



Shelf 673 



Abyssal Deposits 674 



Abyssal Deposits of Pelagic Origin (674); Abyssal Deposits of 

 Terrigenous Origin (676); The Red Clay (676); Analyses of 

 Deep Sea Deposits (677); Table of Analyses of Deep Sea 

 Deposits (677); Older Deposits that have been Considered of 

 Deep Sea Origin (678); Concretions of the Deep Sea (678); 

 Cosmic Deposits of the Deep vSea (679); Submarine Volcanic 



Deposits 674-679 



Interruptions of Marine Sedimentation 680 



Persistence and Variation in Thickness of Marine Strata 682 



Comprehensive Formations 684 



Bibliography XV 685 



CHAPTER XVI. 



Characters and Lithogenesis of the Bioclastic Rocks 691 



Work of Herds of Animals in the Present and the Past; Work of Burrow- 

 ing Animals; Destructive Work of Fish and Marine Invertebrates; 

 Work of Earthworms and Lobworms; Work of Ants and Termites; 

 Comparison of Work of Earthworms and Ants; Summary of Work of 



Ants in Soil and Subsoil; Destructive Work of Plants 691-695 



Bibliography XVI 695 



CHAPTER XVII. 



Summary of Original Features of Clastic Rocks 696 



1. Stratification; Definitions of Stratum; Types of Stratifica- 

 tion 697-700 



2. Cross Bedding 701 



a. Delta Type (702); b. Cross-bedding of Torrential Deposits 

 (702); Cross-bedding of Eolian Deposits (703); c. Comparison 



of Types (704) 701-704 



3. Beach Cusps (706); Fossil Beach Cusps (707); 4. Wave 

 Marks (708) ; 5. Rill Marks 706-708 



6. Mud-cracks, Sun Cracks or Desiccation Fissures 709 



Playa Surface (709); Permanent Lake Surface (709); 

 River Flood Plains (710); The Shore Zone (710) 709-710 



7. Clay Galls (Thon-gallen) (711); 8. Clay Boulders (711); 

 9. Rain Prints (712); 10. Ripple Marks (712); 11. Impressions 



of Animals and Plants in Transit 71 1-7 14 



12. Application of these Structures in Determining Position of 

 Strata 7 1 5 



13. Rounding and Sorting ^of Sand Grains and Wearing of 

 Pebbles 7^5 



