XX TABLE OF CONTENTS 



PAGE 



Peat in the Tropics 509 



Fossil Humuliths 510 



Lignite; Brown coal; Bituminous Coal; Anthracite; Graph- 

 ite 510-51 1 



Ancient Moors (511); Black Soil and Shales of Humulithic 

 Origin (513); Burial of Peat Deposits (514); Liptobioliths. .511-517 

 Allochthonous Vegetal Deposits (518); Marine Vegetal Deposits 518 

 Bibliography XI 519 



CHAPTER XII. 



Original Characters^ and Lithogenesis of the Exogenetic Rocks. 



The Pyroclastics and the Autoclastics 524 



Pyroclastic Rocks 524 



Modern Pyroclastics (524) ; Organic Remains of Modem Pyro- 

 clastics (525); Older Pyroclastic Deposits 524-525 



Autoclastic'Rocks '. 527 



Classification of Autoclastic Rocks 527 



Fault Breccias (528); Intraformational Breccias (529); Fractur- 

 ing and Piling up of Material; Distortion of Layers in Gliding. .528-530 

 Glacial Deposits (531); Character of Modern and Pleistocenic 

 Glacial Deposits (531); Ancient Glacial Deposits (534); The 

 Pre-Cambric Tillite of Canada; Cambric Glacial Deposits; the 



Permic Glacial Deposits 53i~535 



Endolithic Brecciation 536 



Bibliography XII 537 



CHAPTER XIIL 



Original Structure and Lithogenesis of the Atmoclastic and Anemo- 

 CLASTic Rocks 540 



A. Atmoclastic Rocks 540 



Characteristics and Occurrence of Modern Atmoclastic Forma- 

 tions 541 



Texture of Atmoclastic Rocks (542) ; IVIovement of Atmoclastic 

 Material (543); Slow Movements of Rock and Soil; Rock and 

 Soil Creep; Solifluction or Rock Flow (543); Rock Slides and 



Falls (545); Rock Slides Started by Earthquakes 542-546 



Ancient Examples of Rock Streams and Slides (546); Mackinac 



Limestone Breccia 546-547 



Residual vSoils 548 



B. Anemoclastic or Eolian Deposits. Anemoliths 549 



Source of Material of Eolian Deposits 549 



Textural Types of Anemoliths; General Characteristics of Modern 

 Eolian Deposits 55 1 



Sorting of Material according to Size and Specific Gravity; 



Size of Grain in Eolian Deposits; Rounding of Sand Grains; 



Stratification and Cross-bedding of Eolian Deposits 552-554 



