xx 
LIST OF ILLUSTRATIONS. 
116 and 117. Fossils of the Chemung group. 262 
118. Ditto 263 
119. Ditto 264 
120. Ditto 266 
121. Ditto 267 
122. Ditto 269 
123. Ditto 270 
124. Ditto 271 
125. Ditto 273 
126. Section at Sexton’s quarry. 274 
127. Land plants of Chemung group. 275 
128. Section showing the position of the Old red sandstone.278 
129. Comparative section in Indiana ... .. 280 
130. Fossils of the Old red sandstone.. 281 
131. Ditto 282 
132. View of the outcropping edge of the conglomerate. 284 
133. Diagonal lamination in sandstone. 286 
134. Diagonal lamination in conglomerate. 287 
135. Concretionary laminae of iron ore.. 287 
136. Ditto . 288 
137. Similar concentric laminae in the conglomerate and sandstone of Ohio.. 288 
' 138. View in Rock city, Cattaraugus county.. 290 
139. Fossils of the conglomerate... 291 
140. Section showing the position of the conglomerate at Cuyahoga falls, Ohio. 292 
141. Uplift near Eighteen-mile creek, Lake Erie.295 
142. Uplift, Ripley, Lake Erie shore. 296 
143. Uplift, South branch of Cattaraugus creek...297 
144. Uplift at Little’s mill, South branch of Cattaraugus creek. 298 
145. View of the cliffs on Fall creek. 299 
146. Joints in shaly strata, Twenty-mile creek. 300 
147. Joints in limestone .. 303 
148. Jointed structure of cliffs on Seneca Lake and at Lodi. 304 
149. Jointed structure of cliffs on Cayuga lake. 304 
150 and 151. Jointed structure of cliffs on Seneca lake. 305 
152 and 153. Ditto . 306 
154. Jointed structure of the conglomerate... 307 
155. Situation of the Petroleum spring in Freedom. 310 
j 56 and 157. Sections illustrating the geological position of the sulphuretted hydrogen 
springs... 314 
158. Section of drift at Vinton’s quarry, Lake Ontario. 322 
159. Section of drift at Wilson, Niagara county. 323 
160. Section of drift near Rochester. 324 
161. Grooved and polished limestone, Lockport. 326 
