92 
INDEX. 
Doue, M. Bertrand de, on Auvergne allu- 
viums under lava, 267 
Du Bois, M., on the tertiary strata of .Vol- 
hynia and Podolia, 215 
Dufrenoy, M., on the limestone of Blaye, 
near Bordeaux, 209 
— on Hie hill of Gergovia, 258 
on the age of the red marl and rock- 
salt of Cardona, 333 
Durance, river, land-shells brought from 
the Alps into the Rhone by the, 48 
Dunwich, thickness of the crag strata in 
the cliffs near, 172 
Dunwich, dip of the crag strata in a cliff 
between Mismer and — see wood-cut 
No. 33, 175 
Dunes, near Calais, ripple marks formed 
by the winds on the — see wood-cut, No. 
i 36, 176 
Earthquake, Olot destroved by, in 1421, 
191 
of Cutch, effects of the, 104, 249, 
318 
Earthquakes, their effects on the excava- 
tion of valleys, 113 
during the Eoceneperiod, 312 
Earth's crust, signs of a succession of for- 
mer changes recognizable in, 1 
arrangement of the materials compos- 
ing the, 8 
Earth's surface may be greatly changed in 
one part while an adjoining tract re- 
mains stationary, 1 28 
East Indian Archipelago, tertiary forma- 
tions of the, 133 
Ehrenhausen, coralline limestone of the 
hills of, 214 
Eichwald, M., on the tertiary deposits of 
Volhynia and Podolia, 215 
Eifel, volcanos of the, 193 
• map of the volcanic district of the — 
see wood-cut No. 48, 194 
— - lake-craters of the — see wood-cut, 
No. 49, 195 
■ trass of the, and its origin, 197 
— — - age of the volcanic rocks of the, 199 
Elevation of land, how caused, 105 
Elevation, proofs of successive, 111 
Elsa, valley of the, fresh-water formations 
of, 137 
England, tertiary strata of, 19, 135, 171, 
284 
i comparison between the tertiary 
strata of Paris and those of, 282 
. tertiary strata of, conformable to the 
chalk, 282 
■ origin of the tertiary strata of, 284 
, great line of chalk escarpment 
through the central parts of, 315 
— elevation of land on the east coast of, 
since the Older Pliocene period, 316 
England, elevation of land gradual in the 
S.E. of, 318 
on the excavation of valleys in the 
S.E. of, 319 
Enza, river, nature of the sediment depo- 
sited by the, 161 
Eocene period, derivation of the term, 55 
proportion of living species in the 
fossil shells of the, 55 
position of the beds referable to 
this era — see diagrams Nos. 3 and 4, 
20, 21 
geographical distribution of the re- 
cent species found in the, 55 
— — mammiferous remains of the, 59 
fresh-water formations of the, 
225 
• marine formations of the, 241 
our knowledge of the physical geo- 
graphy, fauna and flora of the, conside- 
rable, 254 
■ volcanic rocks of the, 257 
map of the principal tertiary basins of 
the — see wood-cut No. 62, 275 
earthquakes during the, 312 
— — alluviums of the, 317 
chasm between the newest second- 
ary formations and those of the, 328 
great volume of hypogene rocks 
formed since, 381 
number of species of fossil shells 
common to different formations/eferri- 
ble to the, Appendix I., p. 49 
number of living species in the fossil 
shells of the, (h., 50 
— — number common to the Pliocene, 
Miocene, and, ib., 50 
geographical distribution of the liv- 
ing species found in the, ib., 51 
Eocene strata in the Bordeaux basin, 208 
its' relative position — see wood-cut 
•' No. 52, 209 
Epomeo, shells found in volcanic tuff near 
the summit of, 126 
Erratic blocks of the Alps, 148 
transported by ice, 149 
Escarpments, manner in which the sea 
destroys successive lines of, 111, 292 
Escarpments of the chalk in the Weald 
valley, once sea-cliffs — see wood-cuts, 
Nos. 65 and 66, 289, 291 
Estuary deposits, arrangement of, 9 
Eternity of the earth, or of present system 
of changes not assumed in this work, 
383 
Etna, marine and volcanic formations at 
its base, 75 
■ view of, from the limestone platform 
of Primosole — see diagram No. 11, 75 
connexion of the strata at its base 
with those of the Val di Noto— see 
diagram No. 12, 76 
