CONTENTS ix 



THE WORK OF GLACIERS 251 



Erosion and transportation, 251. Varied nature of glacial debris, 

 255. Topographic effects of glacial erosion, 256. Positions in 

 which debris is carried, 258. Wear of drift in transit, 262. 



DEPOSITION OF DRIFT 262 



Types of moraines, 266. Distinctive nature of glacial deposits, 

 267. Glaciated rock surfaces, 268. 



GLACIO-FLUVIAL WORK 272 



ICEBERGS 275 



THE INTIMATE STRUCTURE OF GLACIER ICE 275 



Development of ice from snow, 275. Structure and arrangement 

 of crystals in glacier ice, 278. Probable fundamental element in 

 glacier motion, 280. Auxiliary elements, 282. Corroborative 

 phenomena, 285. Other views of glacier motion, 286. 



CHAPTER VII 

 THE WORK OF THE OCEAN 



GENERAL FACTS 289 



PROCESSES IN OPERATION IN THE SEA 292 



Diastrophism, 292. Vulcanism, 295. Gradation, 295. Move- 

 ments of the sea-water, 296. Waves, 297. Work of the waves, 

 299. Erosion, 299. Wave-erosion and horizontal configura- 

 tion, 306. Transportation, 308. Deposition by waves, under- 

 tow, and shore-currents, 309. Effect of shore-deposition on 

 coastal configuration, 314. The work of ocean-currents, 315. 



DEPOSITS ON OCEAN-BED 316 



Shallow-water deposits, 317. Chemical and organic deposits in 

 shallow water, 323. Limestone, 325. Deep-sea deposits, 326. 

 Contrasted with shallow-water deposits, 326. 



CHAPTER VIII 



LAKES 



GENERAL FACTS ' 332 



Changes taking place in lakes, 332. Lacustrine deposits, 333. 

 Extinct lakes, 334. Salt lakes, 335. Origin of lake basins, 337. 



CHAPTER IX 



MOVEMENTS AND DEFORMATIONS OF EARTH'S BODY 

 (DIASTROPHISM) 



MINUTE AND RAPID MOVEMENTS 338 



Earthquakes, 338. The geologic effects of earthquakes, 344. 



