514 



INDEX. 



Vegetables, fossil, of the Weald clay, 181, 228. 



Hastings sand,171,no<e, 



172, 181, 206 229. 



230, 298. 



-.- Piirbeck strata, 13,221, 



Portland stone, 269. 



Portland sand, 269. 



. Kimmeridge clay, 269. 



Volcanic action, cause of, not known, 64. 

 not reducible to laws of any con- 

 stant force as respects its effects, 65, 67. 

 may be an effect of chemical 



combination, 68. 



Voysey, Dr., on various points of Indian Geo- 

 logy, referred to, 410, note, 412, 417, and note, 

 418, 426, 428, 431. 



W. 



Wardour, Vale of, general structure of, 244 ; strata 

 described, 244 ; Chalk, 245 ; Upper green- 

 wand, 240 ; Gault, 247 ; Lower green-sand, 

 248 ; Wealden, 249-254 ; Portland stone, 

 254 ; Portland sand, 255 ; Kimmeridge clay, 

 256. 



, anticlinal line of, 244. 



■ ^- , fossils of, 257—261. 



thepenetrationof water to highly heated matter, 

 68. 

 must diminish in force by the 



■-, produced by Warminster, Vale of, described, 257. 

 , fossils of, 257, 



earth's refrigeration, 68. 

 and 



by each successive chemical combination, 68. 

 has not acted during all geologi- 



Wasdale Head Farm, granite veins penetrate 



the greywacke near, 68*. 

 , the Shap granite of, cuts through 



band of limestone and calcareous slate, 54, 68*. 

 ■ , limestone and 



cal periods with equal intensity, 65. 



slate reappear beyond the granite, 68*. 

 Water Blain limestone, notices of, 50, and note. 



, no indications of its recent oc- Waters, mineral, of the environs of Bonn, 463 ; 



currence in the Dukhun, 428. analysis of, 463. 



Volcanic craters, none seen in the Dukhun, 428. Weald clay, a member of the Wealden group, 

 . eruptions in the neighbourhood of Bonn, 103. 



446, 447. 



eruptions of the Siebengebirge, 468. 



— took place 



carefully traced in W. Sussex by 



Mr. Martin, 160. 

 , beds of sand and stone subordinate 



during the deposition of the brown-coal beds, 

 468. 

 Roder- 



to, in Sussex, 159; in Surrey, 160; and in 

 Kent, 161. 

 , cavities in, at its junction with the 



berg, 447, 468. 

 Volcanic forces, provision for an eternal and 



uniform circulation of, not compatible with 



known laws of chemical action, 67. 

 have modified the earth in two 



ways, 68. 

 ~ by violent 



paroxysms, producing lines of volcanic vent, 



68. 

 by local 



Lower green-sand in W. Sussex, 156. 



near Guildford, 148. 



near Hindhead, Surrey, 148. 



in the Isle of Wight, 185; detail of 



its beds near Cowleaze Chine, 198. 



-, fossils of, in Kent and Surrey, Sus- 



sex and Hampshire, 176. 

 in the Isle of Wight, 



205. 



on the Dorsetshire coast, 



action producing volcanic cones, &c., 68. 228. 



rocks of the environs of Bonn, their ages Wealden, adopted as the general name of the 



relative to each other and to the sedimentary strata between the Lower green-sand and the 



rocks, 467. Portland stone, 103. 



