Outlines of the Earth's History: A Popular Study in PhysiographyShaler, Nathaniel Southgate
History
Outlines of the Earth's History: A Popular Study in Physiography
Shaler, Nathaniel Southgate
Physical geography
comes at least among the legends which we should like to believe.
As told the present writer by a native of the district, it happened
when, in the nighttime the mountain came down, the herdsmen and their
cows gathered in the _chalets_--stout buildings which are prepared to
resist avalanches of snow. In one of these, which was protected from
crushing by the position of the stones which covered it, a solitary
herdsman found himself alive in his unharmed dwelling. With him in the
darkness were the cows, a store of food and water, and his provisions
for the long summer season. With nothing but hope to animate him, he
set to work burrowing upward among the rocks, storing the _debris_ in
the room of the _chalet_. He toiled for some months, but finally
emerged to the light of day, blanched by his long imprisonment in the
darkness, but with the strength to bear him to his home. In place of
the expected warm welcome, the unhappy man found himself received as a
ghost. He was exorcised by the priest and driven away to the distance.
It was only when long afterward his path of escape was discovered that
his history became known.
Returning to the account of the _debris_ which descends at varied
speed into the torrents, we find that when the detritus encounters the
action of these vigorous streams it is rapidly ground to pieces while
it is pushed down the steep channels to the lower country. Where the
stones are of such size that the stream can urge them on, they move
rapidly; at least in times when the torrent is raging. They beat over
each other and against the firm-set rocks; the more they wear, the
smaller they become, and the more readily they are urged forward.
Where the masses are too large to be stirred by the violent current,
they lie unmoved until the pounding of the rolling stones reduces them
to the proportions where they may join the great procession.
Ordinarily those who visit mountains behold their torrents only in
their shrunken state, when the waters stir no stones, and fail even to
bear a charge of mud, all detachable materials having been swept away
when the streams course with more vigour. In storm seasons the
conditions are quite otherwise; then the swollen torrents, their
waters filled with clay and sand, bear with them great quantities of
boulders, the collisions of which are audible above the muffled roar
of the waters, attesting the very great energy of the action.
Public-domain text, read in full here on John Shaqi.
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