“The boulders from Mont Blanc, upon the plain below Ivrea,
assure us that the glacier which transported them existed
for a prodigious length of time. Their present distance from
the cliffs from which they were derived is about 420,000 feet,
and if we assume that they traveled at the rate of 400 feet
per annum, their journey must have occupied them no less
than 1,055 years! In all probability they did not travel so
fast.”
Glaciers are sometimes hurried out of their characteristic
snail-pace. A marvelous spectacle is presented then.
Mr. Whymper refers to a case which occurred in Iceland
in 1721:
“It seems that in the neighborhood of the mountain Kotlugja,
large bodies of water formed underneath, or within
the glaciers (either on account of the interior heat of
the earth, or from other causes), and at length acquired
irresistible power, tore the glaciers from their mooring on
the land, and swept them over every obstacle into the sea.
Prodigious masses of ice were thus borne for a distance
of about ten miles over land in the space of a few hours;
and their bulk was so enormous that they covered the sea
for seven miles from the shore, and remained aground
in six hundred feet of water! The denudation of the land
was upon a grand scale. All superficial accumulations were
swept away, and the bedrock was exposed. It was described,
in graphic language, how all irregularities and depressions
were obliterated, and a smooth surface of several miles’
area laid bare, and that this area had the appearance
of having been PLANED BY A PLANE.”
The account translated from the Icelandic says that the
mountainlike ruins of this majestic glacier so covered
the sea that as far as the eye could reach no open water
was discoverable, even from the highest peaks. A monster
wall or barrier of ice was built across a considerable
stretch of land, too, by this strange irruption:
“One can form some idea of the altitude of this barrier
of ice when it is mentioned that from Hofdabrekka farm,
which lies high up on a fjeld, one could not see
Hjorleifshofdi opposite, which is a fell six hundred and
forty feet in height; but in order to do so had to clamber
up a mountain slope east of Hofdabrekka twelve hundred feet
high.”
These things will help the reader to understand why it is
that a man who keeps company with glaciers comes to feel
tolerably insignificant by and by. The Alps and the glaciers
together are able to take every bit of conceit out of a man
and reduce his self-importance to zero if he will only
remain within the influence of their sublime presence long
enough to give it a fair and reasonable chance to do its work.
The Alpine glaciers move–that is granted, now, by everybody.
But there was a time when people scoffed at the idea;
they said you might as well expect leagues of solid rock
to crawl along the ground as expect leagues of ice to do it.
But proof after proof as furnished, and the finally the
world had to believe.
The wise men not only said the glacier moved, but they
timed its movement. They ciphered out a glacier’s gait,
and then said confidently that it would travel just
so far in so many years. There is record of a striking
and curious example of the accuracy which may be attained
in these reckonings.
In 1820 the ascent of Mont Blanc was attempted by a Russian
and two Englishmen, with seven guides. They had reached
a prodigious altitude, and were approaching the summit,
when an avalanche swept several of the party down a
sharp slope of two hundred feet and hurled five of them
(all guides) into one of the crevices of a glacier.
The life of one of the five was saved by a long barometer
which was strapped to his back–it bridged the crevice
and suspended him until help came. The alpenstock
or baton of another saved its owner in a similar way.
Three men were lost–Pierre Balmat, Pierre Carrier,
and Auguste Tairraz. They had been hurled down into the
fathomless great deeps of the crevice.