INDEX. 



529 



Tweng, Tauern Alps, encrinital limestone asso- 

 ciated with mica and chlorite slates occurs near 

 the village of, 306. 



Tycho-Brahe, the hill of Wildon one of the astro- 

 nomical stations of, 390. 



Tyne, from the mouth of, to the confines of Der- 

 byshire, a formation of sand and sandstone may 

 be traced between the coal measures and the 

 magnesian limestone, 65. 



Tynemouth Castle cliff, fault in, affects both the 

 coal measures and the magnesian limestone, 62. 



U. 



Ulbster, description of the calcareous flags near, 

 136 and note. 



Untersberg, enumeration of the strata on the north 

 flank of the, 348. 



section from the ridge of the, to the 



valley of the Saal, 346. 



Upper green sand, notice of, in Wiltshire, 269. 



. fossils procured from, in Sus- 

 sex, 210. 



in Wiltshire, 276. 



red marl and gypsum, notice of, in Durham 



and Yorkshire, 109. 

 sandstone, notice of, in Durham and 



Yorkshire, 109. 



" and upper red marl, the equi- 

 valents of the hunter sandstein and keuper, 

 121. 



Upper thin-bedded limestone, description of the, 

 of the new red sandstone series, 103. 



probable cause of 



the fissures in the, 103. 



■ section of, at Bro- 



therton, near Ferry Bridge, 106. 



. ___ Knot- 



Lime- 



tingley, 105. 



stone-hill, west of Tickhill, 105. 



Nosterfield and Well, 107. 



between 



range, outliers, pro- 

 bable extension of, towards the North, 106. 

 _______ galena occurs in. 



Upper thin-bedded limestone, notice of fossils 

 found in, 108. 



Valenciennes, M., observations on the Caithness 



fossil fishes, 143. 

 Variegated marls with beds of shell limestone 



without magnesia, description of, 80. 

 Vauquelin, M., notice of the analysis of the Guano 



of Peru, by, 236. 

 Vegetable fossils in the marl slate of Midderidge 



and other parts of the magnesian limestone, 



120. 

 Viburnum CEningense, notice of, in the (Eningen 



deposit, 287. 

 Viennabasin, comparison of the tertiary strata com- 

 posing the, with those of Lower Styria and the 



London and Paris basins, 403. 



description of the, 420. 



lowest beds, or Tegel, reached only 



by deep borings, 402. 

 tertiary strata of the, deposited in a 



bay of an ancient sea, 402. 

 grit considered the representative of the 



green sand and chalk, 320. 

 may be subdivided into three groups, 



411. 



position of the beds nearly horizontal, 411. 



V^illefranche Bay, notice of the deposit containing 



sub-fossil shells in, 172. 

 Viridaya mountains, description of a portion of 



the lowest northern steps of the, 191 et seq. 

 Volcanic action, no traces of, since the sea retired 



from the bays of Lower Styria, 401. 

 conglomerates of Lower Styria resemble 



those of Puy en Velay, 400. 

 rocks of Lower Styria, relation of, to the 



youngest tertiary strata, 395 et seq. 

 relative age not to 



between Nosterfield and Well, 108. 



be determined by mineralogical characters, 



400. 

 probably produced 



during the formation of the youngest tertiary 



deposits, 400. 

 Von Buch, remarks on his theory of the change of 



common limestone into dolomite, 183, 190. 



