96 



INDEX. 



Jobert, M.,'on the different ages of Au- 

 vergne alluviums, 267 



Jorullo, time for which the lava of, re- 

 tained its heat, 363 



Jura, erratic blocks of the, 148 



Kaiserstuhl, volcanic hills in the plains of 



the Rhine, 152 

 covered nearly to their summits with 



loess, 152 

 Katavothrons of the plain of Tripolitza now 



filling up with osseous breccias, 144 

 Kater, Capt., on recent deposits near 



Ramsgate, 182 

 Keferstein, M., his objections to M. de 



Beaumont's theory, 347 

 Kingsclere, valley of, ground plan of the 



see wood-cut No. 78, 305 



section across the, from North to 



South see wood-cut No. 79, 305 



section of the, with the heights on a 

 true scale see wood-cut No. 80, 306 



anticlinal axis of the, 306 



proofs of denudation in the, 307 



Killas of Cornwall, 370 



Laach, lake-crater of, 197 



Lacustrine deposits overlying the crag 



see diagrttrr-No. 30, 173 

 Lake Aidat", formed by the damming up of 



a river by lava, 269 

 Lake-craters of the Eifel see wood-cuts 



Nos. 49 and 50, 195, 196 , 



' how formed, 196 



Lakes, arrangement of deposits in, 8 

 Lake Superior, recent deposits in, analo- 

 gous to those of the Eocene lakes in 

 Auvergne, 230 



nature of the recent deposits in, 334 

 the bursting of its barrier would cause 



an extensive deluge, 270 



Lamarck, his list of the fossil shells of the 

 Paris basin, 156 



La Motta, valleys excavated through blue 

 marl capped with columnar basalt at, 77 



. volcanic conglomerate of see dia- 

 gram No. 13, 77 



relative age of the basalts of, 82 

 Lancashire, tertiary strata of, 135 



Land, elevation of, caused by subterranean 



lava, 105 

 Land-shells drifted from the Alps into the 



Mediterranean, 48 



Landers, on the delta of the Niger, 330 

 Landes, tertiary strata of the, 206 

 La Roche, section of the hill of, 229 

 Las Planas, lava current of, 189 

 LaTrinita, near Nice, fossil shells of, 168 

 Lauder, Sir T. D., on the parallel roads of 



Glen Roy, 131 



Lava, a bed of oysters between two cur- 

 rents of, at Vizzini, 73 



Lava, columnar, stratified marl resting on, 



in the Isle of Cyclops see wood-cut 



No. 14, 79 



minerals in cavities of, 81 

 . i veins of, on Etna, 91 

 great length of time which it requires 



to cool, 363 



Lava streams solid externally while in mo- 

 tion, 86 

 Lavas of the Cyclopian isles not currents 



from Etna, 81 



Lavas and breccias of the Val del Bove, 93 

 Lavas excavated by rivers in Catalonia, 



186, 189 

 Lavas and alluviums of different ages in 



Auvergne see wood-cut No. 61, 266 

 La Vissiere, fresh-water limestone covered 



by volcanic rocks at, 263 



faults in the limestone at, 263 



Leeward Islands, geology of the, 132 



Le Grand d'Aussi, M., on alluviums under 



lava in Auvergne, 267 

 Leith Hill, height of, 293 

 Lentini, volcanic pebbles covered with 



serpulae in the limestone near, 73 

 .. dip of the strata at, 74 



valleys near, their origin, 111 



Leonhard, M., on the loess of the valley of 



the Rhine, 151 



on the volcanic district of the Lower 

 Rhine, 201 



"' on granites of different ages near 



Heidelberg, 357 

 Lewes, fissures in the chalk filled with 



sand near, 283 



view of the ravine called the Coomb 

 near see wood-cut No. 75, 301 



fault in the cliff-hills near -see wood- 

 cut No. 76/301 



Leybros, fresh'-water limestone of, 237 

 Lias, strata of the, 326 



strata between the ^Carboniferous 



group and the, 326 



converted into flinty slate by trap 



dike in Antrim, 370 



altered in the Alps, 372 



- altered in Hebrides, 378 



Licodia, relative age of the basalts of, 82 



Lignite interstratified with the sub-Apen- 



nine marls, 159 

 Lima, valley of, proofs of the successive 



rise of the, 130 

 Limagne d'Auvergne, lacustrine deposits 



and volcanic rocks of the see map, 



wood-cut No. 56, 226 

 Limestone formation of the Val di Noto 



described see diagram No. 5, 64 

 its organic remains, 65 

 Limestone, resting on lava at Capo Santa 



Croce, 68 

 Lithological character of the sub-Apen- 



nine beds, 157, 162 



