The Romance of Modern Geology: Describing in simple but exact language the making of the earth with some account of prehistoric animal lifeGrew, Edwin Sharpe
Science
The Romance of Modern Geology: Describing in simple but exact language the making of the earth with some account of prehistoric animal life
Grew, Edwin Sharpe
Geology; Paleontology
shock, for more than two centuries is attested by good evidence.
The coast in many places is proven to be from twenty to thirty feet
higher to-day than it was in the middle of the seventeenth century.
Sir Charles Lyell, in his _Principles of Geology_, gives a most
interesting account of the sudden upheaval of a portion of a mountain
range, with the accompaniment of a great earthquake, near Wellington,
in New Zealand, in January, 1855. Both the North and South Islands of
that colony have been affected by upliftings during the nineteenth
century, and these movements have been attended by powerful and
far-reaching earthquakes. The changes wrought by these movements on
the shores and farther inland as well have been remarkable during the
last hundred years.
Another example of the same kind of activity is seen in the
occasional rise of islands from the sea; but to this we shall refer
again, and for the present we may return to the Calabrian earthquake,
which presented many curious and many characteristic features.
During the earthquake the surface of the country heaved in great
undulations, which were productive of a feeling of sea-sickness, and
which, according to some observers, made the clouds appear to stand
still, as they will sometimes seem to do from the deck of a tossing
ship. The fissures which appeared in the ground were numbered by
thousands, and sometimes the displacements of the earth amounted to
as much as ten feet. Houses were lifted high up; in other places the
land or the sea-floor sank several feet. Many of the fissures opened,
spurted out sand or water, and then closed again; and some of the
Calabrian plains after the earthquake were found to be dotted with
circular hollows, on the average about the size of carriage wheels,
which were like wells, but were sometimes filled with sand instead
of water. These were afterwards found to be =V=-shaped. In addition
to these hundreds of small cone-shaped hollows or wells there were
other water basins more deserving the name of ponds or lakes. One of
these in the neighbourhood of Seminara, to which the name of Lago di
Tolfilo was given, was about a third of a mile in length, and was so
copiously fed by the springs ranged in a fissure in its bottom that
all attempts to drain it proved useless. Near Sitizam a valley was
completely choked up by the landslip from opposite sides, and behind
this new dam a lake was formed which was about two miles in length
and one mile in breadth. Vivenzio states that fifty lakes arose
at the time of the earthquake, and the Government surveyors, who
included ponds, counted no fewer than 215. The first effect of the
more violent shocks was generally to dry up the rivers. Immediately
afterwards many of their beds were so blocked up over them that the
rivers overflowed. From the rock of Scylla opposite to Charybdis, in
the Straits of Messina, large sections of cliff were broken off,
in one instance for a whole mile's length of coast. The sea and the
Public-domain text, read in full here on John Shaqi.
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