OCR Text |
Show 104 INOEX, Secondary rocks, volcanic, of many different ages, 335 Secondarv fresh-water deposits why rare, 330 • Secondary period~, duration of, 328 Sedgwick, Professor, on diluvial waves, 101. 272 -- on the tertiary formations of Styria, 213, 214 -- on the volcanic rocks of Styria, 224 --on the Isle of Wight, 281,315 -- on synclinal lines, 293 -- on the theory of M. Elie de Beau-mont, 347 -- on the Cornish granite veins, 3f>5 -- on garnets in altered shale, 369 Sediment, changes in the distribnti.on of, which would take place on the filling up of large lakes, 27 Sedimentary deposition, causes which occasion the shifting of the areas of, 26 Sedimentary rocks, distinction between volcanic and, 10 Seguinat, Montagne de, lamination of . clay-slate in the-see wood·c~t, No. 89, 366 Selenite found in clay at the foot of Etna, 77 Septaria of the London clay described, 279 Serre dl!l Solfizio, sections of buried cones in the cliffs of, 88 --dikes at the base of-see wood-cut No. 19, 90 Serres, M. Marcel de, on the drifting of land shell.; to the sea by the Rhone, 48 --on the tertiary strata of Montpellier, 215 . --on the fossil insects of Aix, 277 Sicily, geological structure of, 22, 63 -- dip and direction of the newer Plio-cene strata of, 73 -- origin of the newer Pliocene strata of, 103 -- form of the valleys of, 109 ---no peculiar indigenous species found in, 115 --breccias containing bones of extinct animals in ca\'es in, 139 -- alluviums of the newer Plioceue, period in, 151 --fossil shells of-see Tables, Appendix I. -- number of living species in the fossil shells of-see Appendix I., 47 -- number common to Italy and, ib. 47 --number common to Italy, the Crag and, ib. 47 -- number of ~pecies proper to, ib. 47 Shells, tables of fossil-( sec Appendix,) 49 --characteristic tertiary-(see Plates,) 50 -- necessity of accurately determining the species of, 50 Shells, recent, numerical proportion of in the different terti:try periods, 58 -- number of 11pecies of, found both living and fossil, 394 -- fossil tertiary, number examined to constr·uct the tables, 394 -- fossil, number common to all the tertiary periods, Appendix I., 50 --living, number of those found in a fossil state in all the tertiary period~, ib. 50 --geographical distr·iuution of those species which have their fossil analogues, ib. 51 Sherringham, sections in the cliffs east of -see wood.cuts, Nos. 39 and 40, 178, 179 -- rapid waste of the cliffs at-see section, wood-cut No. 72, 297 Shetland, action of the sea on the coast of, 146 --granites of different ages in, 357 -- passage of trap into granite in, 362 Siebcngebirge, volcanic phenomena of the, 198 Sienna, Subapennine strata near the town of, 160 ·-· microscopic fossil shells very abundant near, 163 --list of fossil shells from-Appcnclix Jr., 59 Siliceous schist, clay converted into by lava, 701 81 Silvertop, Col., on the tertiary strata of Spain, 170 Simeto, plain of the, 76 Sioule, l'ircr, ravines cut through lava-cur. rents by the, 265 Sky, age of the granite of, 358 Smyth, Capt. W. H., his drawing of the Isle of Cyclops-see wood-cut No. 14, 79 . -- on the extinct volcanos of Sardi-nia, 193 Somma, escarpment of, 84, 85, 87, 96 -- changes c:ws~d by dikes iu the, 91 --dikes of, 121 -- minerals found in, 121 --parallelism of the opposite sides of the dikes of, 122 -- varieties in the texture of tbe dikes of, 124 Somma and Vesuvius, differences in the composition of, 120 Sortino, great limestone formation seen in the valleys of, 64 -- bones of extinct animals in caves near, 139 South Downs, chalk ridge called the, 287 -- section from to the North Downs across the Weald Valley-see wood-cuts No. 63 and 64, 288 -highest point of the, 288 INDEX. 105 South Downs, view or the escarpment of the-see wood-cut No. 65, 290 -- section from their northern escarpment to Barcombe-sce wood-cut No. 71, 296 -- on the former continuity of the chalk of the North and, 303 Spaccaforno limestone, 65 Spain, tertiary formations of, 170 -- extinct volcanos of the north of, 183 --lavas excavated by rivers in, 186,189 Species, changes of, everywhere in pt·o-gre~ s, 30 -- effects of changes of climate on, 44 --superior longevity of molluscous, 48 --necessity of accurately determining, 49 -~- living, proportion of in the fossils of the newer Pliocene period, 53 -- in the older Pliocene period, 54 -- in the Miocene period, 54 -- in the Eocene period, 55 --their geographical distribution, 55 -- in Sicily older than the country they inhabit, 115 -- outlive great revolutions in physical geography, 115 -- none common to the secondary and tertiary formation~, 327 Spinto, fossil shells in green sand at, 211 Steininger, 1\f., on the loess of the Rhine, 151 -- on the volcanic district of the Eifel, 201 Steyning, chalk e~carpment as seen from the hill above-see wood-cut No. 66, 291 Stirling Castle, altered strata in the rock of, 369 Stour, transverse valley of the, 298 Strata, cause of the limited continuity of, 9 - - order of succession of-see uiagram No. 1, 14 --origin of the European tertiary, at successive periods, 18 -- Recent, form a common point of departure in all countrie!'1 58 --with ami without organic remains alternating in the Paris basin, 254 -- on the consolidation of, 334 Stratification, unconformable, remarks on, 30,33 --of the Crag-see wood-cuts, 174, 175 --of primary rocks-see wood-cut No. 89, 365, 366 Strike of beds, explanation of the term, 346 Stromboli, lava of, has been in constant ebullition for 2000 years, 363 Studer, M., on the loess of the valley of the Rhine, 152 --on the molasse of Switzerland, 212 Styria, tertiary formations of 212 --age of the tertiary strala of, 214 -- volcanic rocks of 223 Sub-Apennine strata, l8, 155 --opinions of Brocchi on the 155 --lithological characters or' the 157 162 ' J --not all of the same age, 157 -- termed marine alluvia by Or. Mac. culloch, 157 --subdivisions of the, described 158 -- how formed, 160 ' --organic remains of the, 163 -- fossil shells of the-see Tables, Ap-pendix I. Subaqueous deposits, our continents chiefly composed of, 9 --how raised, 104 -- distinction between alluvium and J45 I Submarine eruptions, proofs of ancient, in the Bay of Trezza, 78, IH Subsidence on Papandayang, in Java 96 -- on Etna, 96 ' Subterrauean lava the cause of the elevation of land, l 05 Subterranean rocks of fusion, probable structure of the recent, 107 Suffolk, relative age of the tertiary strata of-see diagram No.4, 21 --crag strata of, 171 -- clifls, thickness of the crag in the, 172 Superga, strata composino- the hill of the, highly inclined, 211 ° -- fossil shells of the, 211 Superior, Lake. See Lake Superior. Superposition, 1Jf successive formations, causes of the, 26 -- proof of more recent origin, 35 -- exception~ in regard to volcanic rocks, 36 --no invariable order of, in Hypogene formations, 375 Surface, different states of the, when the secondary and tertiary strata were formed, 23 Switzerlancl, t molasse' of, 212 Synclinal and anticlinal lines describedsee wood-cut No. 68, 293 Syenites not distinguishable from granites, 358 Synoptical Table of Recent and Tertiary Formations, 61 Syracuse,~ection at-see diagram No.5, 64 -- shells found in the limestone of, 65 --range of inland cliffs seen to the north of, 111 -- bones of extinct animals in caves near, 140 -- list of fossil shells from-Appendix H., p. 54 |