526 



INDEX. 



Slate rocks, description of a group between the 



rivers Lune and Wliarfe, 1 et seq, 

 series of the Lakes, covered sometimes 



by carboniferous hmestone, 3. 

 • varieties of, have been 



mistaken for amygdaloid, 3. 

 description of the three 



groups of which it is composed, 2. 

 of North Wales, observations on the 



globular structure subordinate to the, 4G7. 

 contortions of, distinct from cleavage, 



474. 

 Slaty cleavage, observations on, 4G9. 

 in Cumberland, 



469 et seq. 



— in North Wales, 



470. 



last change, in some cases, to 



which the rock has been subjected previous to 

 consolidation, 474. 



may be carried on indefinitely, 470. 



not possessed by the oldest aiKi 



most crystalline schists, 479. 

 parallelism of, preserved in moun- 



tain ranges, independent of undulations, or in- 

 tervention of coarser mechanical strata, 470, 

 477. 

 — — planes of, and stratification never 



coincide, 472. 



never at right angles to 



planes of stratification, 472. 

 produced by crystalline arrange- 



ment, 471, 481. 



— even in mountam masses, 



477. 



_ strike of, in slate, nearly coincident 



with strike of the bed, 473. 

 in coarse or thin- bedded 



slate, often considerably inclined to that of the 

 strata, 473. 

 to be distinguished from jointed 



structure, 471. 

 Small-grained dolomite, account of the quarries 



of, between Nottingham and Bramham Moor, 



83. 

 description of, 83. 



Smith, Mr. W., lower red sandstone added to the 

 English series by, 65. 



geological maps of Yorkshire and 



other counties by, noticed, 42, 50, Q>5. 

 Sobenstein, instructive sections of rauchwacke or 



magnesian limestone at, 308. 

 Sohawel, notice of the geology at the town of, 193. 

 Sonar river, notice of a calcareous conglomerate 

 in the bed of the, 197. 



structure of the banks of, at Hutta, 



193. 

 Sonneschmid, notice of his work, Mineralogische 

 Beschreibungder Bergwerks Reviere von Mex- 

 ico, 491. 

 Sonthofen, iron ores and nummulitic limestone of, 

 are in tlie highest part of the green sand and 

 cretaceous group of the Aljjs, 332. 



section through the valley of, 329 et 



seq. 

 Sospello, order of formations descending from 



Rocca Tagliata towards, 188. 

 Sowerby, Mr, James, opinion respecting the Go- 



sau fossils, S5d. 

 Sjyirifcr undulalus, found near Midderidge and 



Humbleton in magnesian limestone, 119. 

 Stag, remains of, found in the leitha-kalk of the 



Vienna basin, 403, 404. 

 Stahrenberg, section of the overlying strata at, 



S65. 

 Starzlach, formations in the vicinity of the gorge 



of the, 331. 

 StaufFen, notice of the formations constituting the 



north flank of the, 324, 325. 

 Steetly, account of the small-grained dolomite of, 



84. 

 Steinberg, structure of the hill of, 399. 

 Sterling, Mr., notice of his account of Cuttack, . 



198. 

 Steyer, description of the strata to the south of, 



322. 

 Stockton rail-road, fossil fishes found in making 



the new, 77. 

 Straden, tertiary strata composing the hill of, 



396. 

 Stratification, planes of, never coincide with planes 

 of cleavage, 472. 



