CONTENTS. xi 



PAGE 



Erosion and Transportation 281 



Getting load, 282. Conditions influencing rate of erosion, 

 283. Summary, 286. Varied nature of glacial debris, 286. 

 The topographic effects of glacial erosion, 287. Fiords, 290. 

 The positions in which debris is carried, 290. Transfers of 

 load, 292. Wear of drift in transit, 298. 



Deposition of the Drift 298 



Beneath the body of the ice, 298. At ends and edges 

 of glaciers, 299. 



Types of Moraines 301 



The terminal moraine, 301. The ground moraine, 301. 

 The lateral moraines, 302. Distinctive nature of glacial 

 deposits, 304. Glaciated rock surfaces, 304. 



Glacio-Fluvial Work 305 



Icebergs ; 307 



The Intimate Structure and the Movement of Glaciers 308 



The growth and constitution of a glacier, 308. The 

 arrangement of the crystal axes, 312. 



The Probable Fundamental Element in Glacial Motion 313 



Melting and freezing, 313. Accumulated motion in the 

 terminal part of a glacier, 316. 



Auxiliary Elements 317 



Shearing, 317. High temperature and water, 318. Ap- 

 plications, 319. 



Corroborative Phenomena 320 



Other Views of Glacier Motion 321 



CHAPTER VI. 



THE WORK OF THE OCEAN. 



Volume and composition, 324. Topography of bed, 326. 

 Distribution of marine life, 328. 



Processes in Operation in the Sea 329 



Diastrophism, 329. Vulcanism, 332. Gradation, 333. 



Movements of the Sea- water 334 



Differences in density and their results, 335. Differences 

 in level and their results, 335. Movements generated by 



