392 INDEX. 



Caithness, the protrusion of solid granite at, 282. 

 Cape Cornwall, granite-veins at, 149. 



r , description of a quartz-vein at, 174. 



Carne, Mr., on granite-veins, 150. 160. 



-, on the intersecting veins of Weeth mine, 185. 



Champoleon, the altered rocks of, 326. 

 Cherbourg, the passage of slate into granite at, 138. 

 China-clay and China-stone, Cornish, 16. 



in the granite of the Alps, 89. 



of Zinnwald in the Erzgebirge, 32. 



Chlorite-schist of Cornwall, 45. 

 Clay-slate of Ireland, 63. 



Norway, 79. 



the Erzgebirge mountains, 85. 



, conglomerated, of Cronebane, 116. 



Cliffs and caves, ancient, inland, 272. 



Composition of some rocks associated with and belonging to the secondary 



class, 309. 

 of minerals which enter into the formation of primary 



rocks, 320. 

 Concretionary structure of primary rocks, 91. 



layers developed in amorphous masses, 250. 



, how formed, 253. 



Conglomerate, primary, near Drontheim, 80. 



, various kinds of, among the primary rocks, 115. 

 Conglomerates, the nature of, 342. 

 Contortions of lamina and strata, 334. 

 Convolutions of strata, the theory of, 340. 

 Conybeare, the Rev. W., on the altered appearance of strata next trap, in 



Ireland, 302. 



Cordier, M., remarks on elevation-craters, 270. 

 Cornwall, the granitic rocks of, 15. 



, the primary schists of, 37. 



Cornubianite, description of, 39. 

 Corsica, the primary rocks of, 89. 

 Craters of elevation, 270. 



-. , LyelPs remarks on, 281. 



Cronebane, the structure of slate at, 106. 

 Cruachan, porphyry in the granite of, 26. 



' , granite-veins at, 157. 



Curvature of the Cornish slates, 108. 

 Cyclopian Isles, elevated strata of, 278. 



D. 



Dartmoor, the metamorphic greywacke of, 222. 



Davy, Dr. John, on the granite-veins of Forth Just, 149. 



