490 



INDEX. 



Craven fault, notices of Mr. Phillips's account of, Cumbrian mountains, great dislocations by which 



they became separated from the central carbo- 

 niferous chain, 50. 

 -^ , elevation of the old slates 



60, 95, 98. 



Cross, mountain so called, not to be confounded 

 with Cross Fell, 92, note. 



Cross Fell, notice of fault near base of, 62. 



fault, effects produced by intersection 



of, with the Craven fault, 63. 



Crystalline structure of primary slates, not al- 

 ways effect of igneous action, 65. 



. of secondary rocks some- 

 times due to chemical action, unaided by ig- 

 neous cause, 65. 



— , instances of, stated, 65. 



Cumberland, order of beds associated with band 

 of limestone and calcareous slate in, 48. 



, Professor Sedgwick on the new red 



sandstone series on the north-western coast of, 

 383. 



, position and peculiar structure of 



the schists of, due to causes in action prior to 

 old red sandstone, 49, 55, 65. 



Cumbrian mountains. Professor Sedgwick's in- 

 troduction to an account of the general struc- 

 ture of the, 47. 



, parallelism of, to the chains 



of Cornwall, North Wales, &c., 56. 



■ , central portions composed 



of rocks anterior to the old red sandstone, 47. 

 -, outskirts covered by de- 



of, produced by protrusion of granite and sy- 

 enite, 67. 



', elevation, sudden, 55 ; suc- 

 ceeded by a long period of comparative re- 

 pose, 56. 



, crystalline slates of, pro- 

 bably owe their structure in part to igneous 

 action, 65. 



-, northern and southern cal- 



careous zones of, cut off from the central 

 chain, by the same fault, 61. 

 , inferences deduced respect- 

 ing, from the phaenomena accompanying the 

 band of limestone and calcareous slate, 54. 



, as concerns the 



valleys, 54. 



, boulders from, occur in 



South Lancashire, Cheshire, and Denbighshire, 

 390, note. 

 Cycadeae, in the " dirt" above the "Cap" of Port- 

 land, 220, 222. 



found also in a second bed of dirt, below 



the " Cap", 223 ; a large specimen described, 

 ibid., note. 



not hitherto found at Chicksgrove or 



posits chiefly of the carboniferous order, 47. Wockley, 254. 



, notice of formations consti- Cycadeoideae of Dr. Buckland, two species, found 



tuting the central portion of the, 48. in Portland, 230 ; found by Miss Benett at 



, order of succession of the Tisbury, 15. 



stratified deposits, 48. CyprisValdensis, (PI. XXI. fig. 1.), why separated 



, first determined from Cypris Faba, 344. 



by Mr. Otley, 48. , the genus, perhaps not distinguishable, in 



, older and newer systems of, the fossil state, from Cytherina, 345. 



entirely unconformable, 55. , other species of, 177, 260, 345. 



, no gradations be- Cytherina, a marine genus of Crustacea, near to 



tween, but abrupt transitions, 55. Cypris, 3SS, note; 345. 



D. 



— ■ , mineral axis consists of un- 



stratified crystalline rocks, 49. 



-~~- , formations on the 



sides of, arranged symmetrically, 49. Dangerfield, Capt., on a tradition respecting » 



, general strike of formations shower of earth, by which Oogein was de- 

 composing the chain, 49. stroyed, 428. 



