INDEX. 



45r 



Portishead point on the western side of Bristol 

 coal basin, 246. 



Portland beds in the cliffs at Henqueville in 

 France, ^^ . 



Prayo Porto, in St. Jago, some account of the strata 

 at, 419. 



Prehnite in transition trap, 325. 



Primitive country, extent of, in Russia, 2. 



Primitive rocks of the country bordering on Lake 

 Huron, 188—191. 



Proteosaurus, 43. 



Pulo Nias, an island on the west coast of Suma- 

 tra, described, 403. 



. coralline masses found in, 403. 



surface of, appears once to have been 



the bed of the ocean, 404. " • *- • 



rock in, resembling Kentish rag, 404. 



' proofs of its having been raised up fiom 



the sea, 404. 

 Pyrites, explosion in a vein of, 209. 

 Pyrton, transition rocks at, described, 330. 

 on Severn, fossils of the lias at, 350. 



Quartz hyaline in the micaceous schist of Glen 



Tilt, 65. 

 rock, supplementary remarks on, by John 



MacCuUoch, M.D., 53. 



relations of, with gneiss, 53. 



alternations of, with gneiss, 55, 



57. 



56,57. 



alternation of, with red sandstone, 



local conglomerate of, 58. 



alternation of, with micaceous schist 



and hornblende schist, 59. 



' association of, with chert and jasper. 



59. 



leading varieties of, enumerated, 60. 

 •breccia of, in Glen Tilt, 64. 

 of Calvados and La Manche, 85. 

 alternating with argillaceous slate in 



R. 



Radford, coal works at, in Bristol coal field, 26 1 . 

 Red marl, 12,20,21. 



productive of corn and oaks, 24. 



of the coast of Devonshire, 46. 



■ at Lison in Calvados, 82. 



. formation in India, 160. 



see Newer red sandstone. 



rock marl, 28. 



sand, loose and argillaceous, 20. 



sandstone, 23. 



at Nagore in India, 149. 



' the three distinct formations of, 



314. 



newer : see Newer red sandstone ; 



^-^— — — — old : see Old red sandstone. 

 River navigation of the interior of Russia, 16 — 18. 

 Russia, outline of the geology of, 1 . 



extent of primitive country in, 2. 



boulders scattered over the central parts 



of, 18. 



river navigation of the interior of, 16 — 18. 



southern, 35. 



France, 86. 



" ■ — of the hills near Delhi, 143, 



Salt lakes, 35, 37. 



in India, 148. 



works, 34. 



district, northern, of Russia, 11. 



■ — central, of Russia, 19. 



springs, 20, 22. 



Sand, strata of, containing argillaceous ironstone, 

 &c., 15. 



bed of, from 60 to 1 00 feet in thickness, at 



Barton Cliff, immediately below the lower fresh- 

 water formation, and resting on London clay, 

 93, 94. 



Sandstone, red : see Red sandstone j also Newer 

 red sandstone and OM red sandstone. 



Sand, crystals of, on shores of White Sea, like 

 those of Fontainbleau, 3. 



— — siliceous, used in polishing glass, 4. 



Sargent, F., Esq., notice on fuller's-earth found 

 in chalk, in Sussex, 1 68. 



Scott, David, Esq., communication from him on the 

 geology of Bengal, 132. 



. notice accompanying specimens 



from the neighbourhood of the Garo Village of 



