LIST OF ILLUSTRATIONS xv 



FIGURE PAGE 



183. Structure section across a portion of the Coast Range Mountains 



of central-western California, showing the character of the Ter- 

 tiary folding and faulting 297 



184. Map showing the surface distribution (areas of outcrops) of Tertiary 



and later volcanic rocks in North America 302 



185. Structure section in central Washington showing sheets of Miocene 



lava piled up to a thickness of fully a mile 303 



186. Mount Lassen in northern California in eruption August 22, 1914. 304 



187. Sketch map showing the relations of land and water in Europe 



during Middle Eocene time 306 



188. Sketch map showing the relations of land and water in Europe 



during Middle Pliocene time 307 



189. Sketch map showing the relations of land and water in Europe 



during Middle Pliocene time 303 



190. Diatoms from diatomaceous earth of Tertiary age 311 



191. A well-preserved fossil Palm, Thrimax eocenica, from the Eocene 



of Georgia 312 



192. An Eocene Foraminifer, Nummulina levigata 313 



193. Large Oyster shells, Ostrea georgiana, in Eocene strata of Georgia. 314 



194. Tertiary Pelecypods 315 



195. Tertiary Gastropods 315 



196. A nearly perfect fossil Teleost Fish, Diplomystus densitus, from 



the Eocene of Wyoming 316 



197. A Shark's tooth from the Eocene of the Gulf Coastal Plain ... 317 



198. Head of an Eocene Bird, Odontopteryx toliapicus, showing 



teeth 317 



199. Sketches to illustrate increase in size of brains of Mammals from 



the Eocene to the present 318 



200. A nearly perfect skeleton of the Eocene Phenacodus primaevus . . 319 



201. Chart to illustrate the evolution of the Horse family 320 



202. Primitive or ancestral Horses, Eohippus, of the Eocene 321 



203. Evolution of foot of even-toed (Artiodactyl) Mammals illustrated 



by existing forms 322 



204. a, Mastodon tooth; b, Mammoth tooth 322 



205. A Mammoth Elephant, Elephas primigenius 323 



206. Chart to illustrate the evolution of the Elephants 32 1 



207. Skeleton of an Eocene Creodont, Patriofelis 326 



208. One of the earliest Monkeys, Mesopithecus pentelici, from the 



Miocene of Europe 326 



209. Map showing the areas occupied by ice in North America at the 



time of maximum glaciation 330 



210. Diagram to show how successive glacial drift sheets are dis- 



tinguished 333 



211. Smoothed and striated (glaciated) limestone 335 



212. Structure section across the Black River Valley of northern New 



York, to illustrate the effect of ice erosion and glacial lake dis- 

 position 336 



213. Typical drumlins (side view) in western New York 339 



214. A group of kames in New York state 340 



