] -- Tr.
Large plains and variously indented continents are raised or sunk, lands are
separated from seas, and the ocean itself, which is permeated by hot and
cold currents, coagulates at both poles, converting water into dense masses
of rock, which are either stratified and fixed, or broken up into floating
banks. The boundaries of sea and land, of fluids and solids, are thus
variously and frequently changed. Plains have undergone oscillatory
movements, being alternately elevated and depressed. After the elevation of
continents, mountain chains were raised upon long fissures, mostly parallel,
and in that case, probably cotemporaneous; and salt lakes and inland seas,
long inhabited by the same creatures, were forcibly separated, the fossil
remains of shells and zoophytes still giving evidence of their original
connection. Thus, in following phenomena in their mutual dependence, we are
led from the consideration of the forces acting in the interior of the Earth
to those which cause eruptions on its surface, and by the pressure of
elastic vapors give rise to burning streams of lava that flow from open
fissures.
The same powers that raised the chains of the Andes and the Hiimalaya to the
regions of perpetual snow, have occasioned new compositions and new textures
in the rocky masses, and have altered the strata which had been previously
deposited from fluids impregnated with organic substances.
Pages:
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336