TABLE OF CONTENTS xxi 



PAGE 



Sand Dunes, their Origin and Form 555 



Types of Sand Dunes; (i) Strand Dunes; (2) Lake Shore 

 Dunes; (3) River Flood Plain and River Bottom Dunes; 



(4) Inland or Desert Dunes .♦ 557~56i 



The Forms of Dunes (563) ; Origin of Intercalated Dust and 

 Clay Layers, and of Clay Balls in Sand Dunes; Peat and Lig- 

 nite Deposits in Sand Dunes (564) ; Transgressive Relation of 



Dune Sands to Subjacent Formations 563-565 



Examples of Older Eolian Deposits 565 



The Loess as an Example of a Dust Deposit; Fossils and 

 Concretions in the Loess; Cenozoic and Mesozoic Loess-like 



Deposits; Palseozoic Loess-like Deposits 565-569 



Older Deposits of Dune Types 570 



Volcanic Dust Deposits 572 



Special Indicators of Eolation 572 



Calcareous and Other Non-Siliceous Eolian Sands (573); Recent 

 and Tertiary Examples (573); Older Examples (577); Possible 



Application to the Chalk Beds (577) ; Dunes of Gypsum 573-578 



Bibliography XIII 578 



CHAPTER XIV. 



Original Structure and Lithogenesis of the Continental Hydro- 



clastics 582 



River-laid Clastics or Potamoclastics 582 



Alluvial Fans (583) ; Form and Extent of Modern Alluvial 



Fans (583) ; Basins Filled by River- washed Waste 583-587 



River Flood Plains 588 



Cross-bedding of Torrential Sediments (590); Thickness 

 and Composition of River Deposits (590); Depth of Com- 

 pound Continental Deposits (592); Chatter or Percussion 

 Marks (592) ; Organic Remains in Torrential Deposits (592) ; 

 Distance to which Material may be Carried by Rivers (594) ; 

 Purity and Rounding of Fluviatile Deposits (594); Form 

 of River Pebbles (595); Overlap Relations of River De- 

 posits 590-597 



Flood Plains of Glacial Streams (597) ; River and Flood Plain 



Deposits from Continental Ice-sheets 597-598 



I. Torrential Moraine or Kame Deposits; 2. The 

 Frontal or Apron Plain; 3. The Esker; 4. Glacial 



Sand Plains ; 598-600 



Consolidated Sand Plains; The Nagelfluh of Salzburg. . . . 601 

 Playasor Takyrs and Salinas (602); Preservation of Footprints, 

 etc., in Subaerial Deposits (604) ; Other Structural Characters . 602-605 



Normal Paludal and Lacustrine Clastic Deposits 605 



Deltas 607 



Form and Rate of Growth of Deltas (608) ; Thickness or 

 Depth of Deltas (609); Delta Slopes (610); The Bird-foot 

 Delta of the Mississippi (610); Structure and Composition 

 of the Delta (612); Organisms of the Delta (615); Gaseous 

 Emanations of Deltas (615) ; Cementation of Delta Deposits 



