IN] 



Chalk formation, covered by granite, 



near Meissen, 291. 

 , alternating with volcanic tuff 



277, 278. -See Cretaceous. 

 Champoleon, junction of granite and 



secondary rocks near, 287. 

 Charce, fossil in freshwater strata (see 



figures), 47, 48. 

 Charlesworth, Mr., on the crag, J^3. 

 Charpentier, M., on trap rocks of 



Pyrenees, 278. 

 Cheese-grotto, at Bertrich- Baden, 113, 

 Chemical deposits, 50. 

 Cheshire, ripple-marked sandstone from 



(see fig. 6)., 33. 

 Chevalier, M., on bent coal strata near 



Mons, 69. 

 Chiastolite, 102. 

 Chiastolite-slate, 134. 

 ChimcBra monslrosa, 226. 

 Chimney, the, basaltic dike m St. 



Helena, 111. 

 Cldrotherium, 238. 

 Chlorite, composition of, 102. 

 Chlorite-schist described, 134. 

 Christiania, dikes near, 105, 106. 



, granific rocks of, 128, 129. 



, passage of trap into granitic rocks, 



near, 123. 

 , porphyry conformable to strata 



near, 129, 130. 



, rocks altered by granite, near, 143. 



, tertiary strata, near, 171. 



Cidaris coronata, 219. 



Ciply, cretaceous rocks at, 189. 



Classification of rocks, principles on 



which it is founded, 15. 25. 

 , of the fossiliferous rocks, 157. 



163. 264. 

 Clay described, 25. 

 Clay-slate described, 133. 

 — — , lamination of, in the Pyrenees, 



137. 



, position of, m the metamorphic 



series, 300. 

 Claystone, and Claystone porphyry, 100. 

 Cleavage of rocks, 137. 

 Climate of carboniferous period, 254. 

 Clinkstone, 100. 137. 

 Club-mosses, 250. 

 Coal, vegetable origin of, 42. 244. 



, fossils of the, 244. 



, strata, origin of, 244. 256, 



, on vertical trees in, 42. 257. 



, isolated patches of, 256. 



, rate of deposition of, 258. 261. 



, zigzag flexures of, near Mons, 68. 



. ^ee Carboniferous. 



Coal-pipes, 259. 



Coal brook-dale coal-field, 245. 



CockfieJd Fell, coal turned into soot by 



dike at, 108. 

 Columnar structure in rocks, 110. 119, 



140. 



, in ice, 140. 



Cohmnaria oblonga, 215. 



>EX. 307 



Compact felspar, 100. 

 Concretionary structure in rocks, 53, 

 54. 



Cones and craters, how formed, 91. 

 Conglomerates described, 26. 



, vertical, in Scotland, &c., 64. 



, of New Red sandstone. 240. 



Coniferas, fossil, 56. 251. 255. 

 Consolidation of strata, 50. 

 Conybeare, Rev. W. D., on faults, 78. 82. 



, on changes caused by dikes, 108. 



, on the Chalk formation, 181. 



, on the Plesiosaurus, 227. 



, on the Oolite and Lias, 224. 232. 



, on the New Red sandstone, 236. 



, on the Coal strata, 244. 



Coprolites of the Chalk, 187. 

 Coral islands, changes of level in, 64. 

 Coral rag, fossils of the, 215. 218, 219, 

 Coral reefs, great extent of, 191. 

 Corals, fossil, 175. 214, 215. 

 Corbula alata, 201. 

 Cornean, 100. 



Cornwall, structure of granite of, 119, 

 120. 



, granite veins in, 127. 145. 



Coseguina, volcanic eruption of, 273, 

 Cotta, Dr,, on granite of Weinbohla, 

 291, 



Crag formation, and its fossils, 174. 177. 



, division of, into red and coralline, 



174. 



, may all belong to one period, 



176, 177. 



, its relative position, 178. 



Craigleith fossil trees, 56. 259. 

 Crania, figures of, 37. 183. 

 Crassatella sulcata, 179. 

 Craters, volcanic, how formed, 91. 

 Craven fault, 78. 

 Cretaceous period, 181. 



, volcanic rocks of, 277. 



, plutonic rocks of, 286. 



. <S'ee Chalk. 



Crop out, term explained, 72. 

 Cropthorne, tertiary deposits at, 173. 

 Cuba, tertiary strata in, 172. 

 Curved strata, 65, 66. 



, experiments to illustrate, 67. 



, origin of, 68. 



Cutch, changes caused by earthquakes 



in, 208. 

 Cyalhea glauca, 249. 

 Cyathocrinites planus, 242. 

 Cyclas obovafa, 44. 

 CyprcBU coccinelloides, 175. 

 Cypris, fossil in freshwater strata, 47. 



, figures of, 202. 245. 



Cyrena trigoluna, 44. 

 CytherincB of the Chalk, 41. 



Dartmoor granite, 145. 288. 

 Daubeny, Dr., on the Solfatara, 147. 

 Dax, chalk near, 197. 

 , chalk and volcanic tuflf alternat- 

 ing, near, 277. 



