XX LIST OF ILLUSTRATIONS 



FIG PAGE 



106. Effect of step faults in repeating outcrops . . . . . 250 



107. Model showing effect of dip fault on outcrop . . . . .251 



108. Great thrust fault near Highgate Springs, Vt. . . . 252 



109. Erosion and break thrust, Holly Creek, Ga. . . . . 253 

 no, Great thrust fault near Highgate Springs, Vt. . - . . . 254 

 ill. Model showing the slip of folded beds upon one another . -257 



112. Model showing effects of lateral compression . . . . -257 



113. Fissile quartzite, California . 260 



114. Diagram showing relation of cleavage and stratification planes . 261 



115. Slip Rock, Juniata River, Pennsylvania . . . . . . 263 



116. Dikes of sandstone in shales, northern California .... 268 



117. Unconformity: diagrammatic section through the strata seen in 



Fig- 133 270 



118. Unconformity without change of dip, and overlap .... 271 



119. Contemporaneous erosion in limestone, Iowa . .... 272 



120. Volcanic neck, New Mexico ........ 275 



121. Jointed lava flow, Passaic River, New Jersey ..... 276 



122. Diagram of dike ... 278 



123. Dike of basalt cutting strata; bad lands of eastern Oregon . . 279 



124. Sheet of jointed diabase; Orange, N.J 280 



125. Palisades of the Hudson, New Jersey ...... 281 



126. Contact of intrusive sheet of diabase with shales, Wiehawken, N.J. 282 



127. Diagram of uneroded laccolith ....... 283 



128. Little Sun Dance Hill, South Dakota 284 



129. Mato Tepee, South Dakota 285 



130. Plicated gneiss . . 296 



131. Christiania Fjord, Norway . 307 



132. Hog-back, near Golden, Col. . . . . . . . 315 



133. Mesa and round-topped buttes, bad lands of South Dakota . 317 



134. Evolution of a river system, first stage . . ... . . 329 



135. Evolution of a river system, second stage ..... 329 



136. The Charleston Mountains, Nevada, one of the Basin Ranges . 337 



137. Ordovician Coral, Favistella stellata ...... 380 



138. Triarthrus Becki, restoration 381 



139. Silurian fossils . . . . . . . . . . 390 



140. Pterichthys testudinarius 404 



141. Cladoselache Fyleri 404 



142. Dipterus valenciennesi . 405 



143. Coccosteus decipiens . . . . .... 406 



144. Holoptychius Andersoni . . , . . . . 406 



145. Pleuracanthus Decheni . 434 



