xvi TABLE OF CONTENTS 



PAGE 



Water in the Solid Form 261 



Kinds of Movement of Solid Water (262); Rate of Move- 

 ment; Wasting of the Glaciers; Erosive Work of Ice; 

 Transportation by Ice 262-265 



Bibliography V : 265 



C. THE LITHOSPHERE. 

 CHAPTER VI. 



Classification of the Rocks of the Earth's Crust 269 



Subdivision of rocks 269 



I. The Endogenetic Rocks 271 



1. The Pyrogenic or Igneous Rocks (Pyroliths) 274 



Composition Groups (274); Textural Groups (275); Water 



and Ice as Igneous Rocks (278); Metamorphic Derivatives 



of Igneous Rocks 274-279 



2. The Atmogenic or Atmospheric Rocks (Atmoliths) 279 



I. Snow; II. Firn or Neve; III. Snow Ice or Glacial Ice. . 279 



3. The Hydrogenic Rocks (Hydroliths) 280 



4. The Biogenic Rocks (Bioliths) -. 280 



Caustobioliths (281); Sapropelites, Humus and Humuliths, 



Liptobioliths 281 



Subdivision of Hydrogenic and Biogenic Rocks 281 



Textures of Amorphous Hydrogenics (281); Textures of 

 Biogenic Rocks (281); Table of the Principal Types of 



Hydrogenic and Biogenic Rocks 281-282 



Spherytes, Granulytes and Pulverytes 283 



Ooliths, Pisoliths, Rogensteine, etc 283 



11. The Exogenetic'or Clastic Rocks 284 



Textural Groups (285); Size of Grain (286); Table of Stand- 

 ard Sizes of Rock Fragments (287) ; Types of Sands Based on 



Origin (288); Composition of Clastic Rocks 285-290 



I. The Pyroclastics (290); 2. The Autoclastics (291); 3. The 

 Atmoclastics (292); 4. The Anemoclastics (293); 5. The Hy- 



droclastics (294) ; 6. The Bioclastics 290-296 



Summary of "Sedimentary Rocks " 296 



The Cosmoclastic Rocks 297 



Special Rock Terms 297 



Rock Terms Emphasizing Composition (297); Autoch- 

 thonous and AUochthonous Deposits 297-298 



Bibliography VI 298 



CHAPTER VII. 

 Structural or Tectonic Features of Rock Masses. Original 



Structures and Lithogenesis of the Pyrogenic Rocks 301 



The Pyrogenic Rocks 301 



Intrusive Igneous Bodies 302 



Igneous Versus Sedimentary Contact (309); Contacts of 

 subterranean or abyssal masses (309); Contacts of hypa- 

 byssal or injected masses 309~3io 



