INDEX. 



509 



Saltom, notice of faults at, 395. 



Saltpetre in the Dukhun, manufactured from 

 scrapings of old walls, 426. 



Sand: *ee Bagshot-sand ; Green-sand; Hastings- 

 sand ; Portland-sand. 



and clay, foliated, in very thin beds, re- 

 markable alternation of, 168. 



, hy- 



pothesis to explain it, 168. 



, white and green, remarkably disposed, at 



Tilburstow in Surrey, and other places, 139. 



Sandgate, coast near, view of, (Plate VIII.) 106. 



■ , indications of disturbance near, 124,126. 



Sandown Bay, Isle of Wight, 187. 



Sandstone, new red, immediately below the green- 

 sands of Blackdown, 238. 



resemblance of to the Weal- 

 den, 333. 



■ of the valley of the Eden, the 



parallel of forest sand of Nottinghamshire, 387. 



been ex- 

 posed to great denudation, 387. 



and shale, lowest group of, between 



Penigent and Kirby Stephen, described, 72. 

 , subdivisions of, 72. 



, shale, and calcareous grit group be- 

 tween second and Strong Post limestones, de- 

 scribed, 74. 



. di- 

 stinguished by beds of calciferous grit, 74. 



— , lead- 

 ing subdivisions of, 74. 



, fissile gritstone, and shale, between 



Mosdale Moor and Four Fathoms, described, 

 77. 

 , most re- 



markable of groups alternating with limestone 

 of Cumberland carboniferous system, 77. 

 , contains two beds of 



coal, 78. 



visions of, 77. 



, subdi- 



, the grit- 

 stone used for roofing-slate, 78. 



Saone Haute, equivalent of the Portland strata 

 and Wealden found in, 329, 330. 



Satpoora Hills, Col. Briggs's description of hot 



springs of, 427. 

 Scaphites Hillsii, specimens of, from the Lower 

 green-sand near Maidstone, (PI. XV. f. 5), 128, 

 339. 

 Schistose deposits, remarks on their ancient se- 

 paration into two groups, the upper containing 

 organic remains, the lower none, 66. 



, line of separation difficult to 



determine, 66. 



rocks of Cumberland owe their pecu- 

 liarities of structure and position to causes in 

 action anterior to the existence of the old red 

 sandstone, 49. 



Scotland, general comparison of red sandstone 

 series of, with that of England, 402. 



, red sandstone and conglomerates of, 



assigned principally to old red sandstone, 402. 



Second millstone grit, description of, between 

 Penigent and Kirkby Stephen, 82. 



or black limestone group, between Kirkby 



Stephen and Penigent, described, 73. 



Secondary rocks, from the south coast to latitude 

 of Derby, have a direction parallel to grey- 

 wacke chains, 59 ; reasons why, 59. 



beyond Derby, the direction is 



parallel to great central carboniferous chain of 

 the North, 59. 



and primary stratified rocks, broad mi- 



neralogical distinction between, 66. 



Sedgwick, Professor, F.G.S., descri])tion of a se- 

 ries of longitudinal and transverse sections 

 through a part of the carboniferous chain be- 

 tween Penigent and Kirkby Stephen, 69. 



, introduction to an 



account of the general structure of the Cum- 

 brian mountains, 47. 



, his section between 



Portland Ferry and Weymouth Harbour, 24. 

 , on the coral rag, 



26, note. 



Weymouth, 24, 213, note. 



-, on the vicinity of 



— reference to his ac- 

 count of the Kimmeridge strata near Scarbo- 

 rough, 214. 



3u2 



