ILLUSTRATIONS IN THE TEXT xxvii 



FIQ. PAGE 



205. Former shore lines in the Great Basin 198 



206. Map of the former Lake Bonneville 199 



207. Borax deposits in Death Valley, California 201 



208. Hollowed forms of weathered granite in a desert of Central Asia . 201 



209. Hollow hewn blocks in a wall in the Wadi Guerraui .... 202 



210. Smooth granite domes shaped by exfoliation 203 



211. Granite blocks rent by diffission 204 



212. "Mushroom Rock" from a desert in Wyoming .... 205 



213. Windkanten shaped by sand blast in the desert . . . . 205 



214. The " stone lattice " of the desert 206 



215. Shadow erosion in the desert 206 



216. Cliffs in loess with characteristic vertical jointing .... 207 



217. A canon in loess worn by traffic and wind ...... 207 



218. Diagrams to illustrate the effects of obstructions in arresting wind- 



driven sand 209 



219. Sand accumulating on either side of a firm and impenetrable obstruc- 



tion . 210 



220. Successive diagrams to illustrate the history of the town of Kunzen 



upon the Kurische Nehrung . . . . . . . .210 



221. View of desert barchans ......... 211 



222. Diagrams to show the relationships of dunes to sand supply and wind 



direction 211 



223. Ideal section showing the rising mountain wall about a desert and 



the neighboring slope ......... 212 



224. Dry delta at the foot of a range upon the borders of a desert . . 213 



225. Map of distributaries of streams which issue at the western base of 



the Sierra Nevadas 213 



226. A group of " demoiselles " in the * bad lands ". . . .214 



227. Amphitheater at the head of the Wadi Beni Sur . . . .215 



228. Mesa and outlier in the Leucite Hills of Wyoming . . . . 216 



229. Flat-bottomed basin separating dunes . . . . . .216 



230. Billowy surface of the salt crust on the central sink of the desert of 



Lop 217 



231. Schematic diagram to show the zones of deposition in their order 



from the margin to the center of a desert ..... 217 



232. Mounds upon the site of the buried city of Nippur .... 218 



233. Exhumed structures in the buried city of Nippur . . . . 218 



234. Section across the High Plains . . . ... . , . 219 



235. Section across the lenticular threads of alluvial deposits of the High 



Plains 220 



236. Distributaries of the foot hills superimposed upon an earlier series . 220 



237. Character profiles in the landscapes of arid lands . , . .. . 220 



238. Rain sculpturing under control by joints . . ... ,224 



239. Sagging of limestone above joints . 224 



240. Map of the joint-controlled Abisko Canon in Northern Lapland . 225 



241. Map of the gorge of the Zambesi River below Victoria Falls . .225 



