ILLUSTRATIONS IN THE TEXT xxix 



FIG. PAGE 



280. Diagrams to show how excessive sinking upon the sea floor will cause 



the shore to migrate landward ....... 251 



281. A drowned river mouth or estuary upon a coastal plain . . . 251 



282. Archipelago of steep rocky islets due to submergence . . . 252 



283. The submerged Hudsonian channel which continues the Hudson 



River across the continental shelf . . . . . . 252 



284. Marine clay deposits near the mouths of the Maine rivers which pre- 



serve a record of earlier subsidence and later elevation . . 253 



285. View of the three standing columns of the Temple of Jupiter Serapis, 



at Pozzuoli ........... 254 



286. Three successive views to set forth the recent oscillations of level on 



the northern shore of the Bay of Naples ..... 255 



287. Relief map of San Clemente Island, California 256 



288. Relief map of Santa Catalina Island, California 257 



289. Cross section of the Blue Grotto, on the island of Capri . . .258 



290. Character profiles of coast elevation and subsidence .... 259 



291. Map showing the distribution of existing glaciers and the two impor- 



tant wind poles of the earth ........ 263 



292. An Alaskan glacier spreading out at the foot of the range which 



nourishes it 264 



293. Surface of a glacier whose upper layers spread with but slight restraint 



from retaining walls 265 



294. Section through a mountain glacier ....... 267 



295. Profile across the largest of the Icelandic ice caps .... 267 



296. Ideal section across a continental glacier ...... 267 



297. View of the Eyriks Jokull, an ice cap of Iceland . . . .268 



298. The zones of the lower atmosphere as revealed by recent kite and 



balloon exploration ......... 269 



299. Map of Greenland, showing the area of inland ice and the routes of 



explorers 271 



300. Profile in natural proportions across the southern end of the conti- 



nental glacier of Greenland ........ 272 



301. Map of a glacier tongue with dimple above ..... 273 



302. Edge of the Greenland inland ice, showing the nunataks diminishing 



in size toward the interior , 274 



303. Moat surrounding a nunatak in Victoria Land 274 



304. A glacier pavement of Permo-Carboniferous age in South Africa . 276 



305. Diagrams to illustrate the manner of formation of scape colks . . 277 



306. Marginal moraine now forming at the edge of the continental glacier 



of Greenland . .279 



307. Small lake between the ice front and a moraine which it has recently 



built . .279 



308. View of a drained lake bottom between the ice front and an aban- 



doned moraine . . . . ... . . . 280 



309. Diagrams to show the manner of formation and the structure of an 



outwash plain and fosse . . . . . . . 280 



