XIV CONTENTS 



PAGE 



III* The Physical Manii^estations of Weathering . . . 227 



(1) Disintegration without Decomposition . . . 227 



(2) Weathering influenced by Crystalline Structure . . 229 



(3) Weathering influenced by Structure of Rock Masses . 230 



(4) Weathering influenced by Mineral Composition . . 234 



(5) Results due to Position 238 



(6) Induration on Exposure 240 



(7) Changes in Color incidental to Weathering . . 243 



(8) Relative Amount of Material removed in Solution . 245 



(9) Incidental Surface Contours 246 



(10) Effacement of Original Characteristics . . . 249 



(11) Simplification of Chemical Compounds incidental to 



Weathering ... \ ... . 252 



(12) Other Results incidental to Decomposition and 



Erosion 253 



IV. Time Coitsiderations 255 



(1) Rate of Weathering influenced by Texture . . • 255 



(2) Rate of Weathering influenced by Composition . , 256 



(3) Rate of Weathering influenced by Humidity . . 257 



(4) Rate of Weathering influenced by Position . . . 257 



(5) Relative Rapidity of Weathering among Eruptive and 



Sedimentary Rocks 258 



(6) Time Limit of Decay 260 



(7) Relative Rapidity of Weathering in Warm and Cold 



Climates 263 



(8) Difference in Kind of Weathering in Cold and Warm 



Climates 269 



(9) Extent of Weathering 271 



(10) Relative Amounts of Materials lost through Weather- 

 ing in Hilly and Plains Regions .... 273 



PART IV 



TEANSPOBTATION AND BEDEPOSITION OF HOCK DEBBIS 



1- AcTiOK OF Gravity 274 



2. ACTIOIT OP WATE3B AlTD ICE 275 



3. AcTiOK OF Wind 280 



