国立情報学研究所 - ディジタル・シルクロード・プロジェクト
『東洋文庫所蔵』貴重書デジタルアーカイブ
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| 0413 |
Tibet and Turkestan : vol.1 |
| チベットとトルキスタン : vol.1 |
引用情報
OCR読み取り結果
time the width, volume, and velocity suggested by these
boulders, now for ever dry. Many of them seemed to
be granitic, though granite strata were not seen in the
neighbouring heights, which here—as generally across
the Aksai Chin—rose to an elevation of from one thou-
sand to three thousand feet above the flat areas. The
existence of such tremendous hydraulic force acting on
materials no longer seen in the position of upheaval, hints
of the degradation of complete strata of the towering
masses that have been crumbled from a uniform eleva-
tion perhaps not less than that of Mount Everest. When
one considers the wide-stretching sands of all Central
Asia and the empire valleys of India as being probable
deposits from these heights, the supposition just made
seems not over-bold. There is thus imaged to the eye
of the imagination a vast mound one thousand miles in
length, five hundred miles in breadth, and five miles or
six miles in height above the sea. Its southern front
and portions of its flanks are exposed, with varying
directness, to moisture-laden winds from the great seas.
Here then the secular attack upon the mound will be most
fierce. If the first snows that fall on the plateau's top
are frozen by perennial cold into a shield protecting
against hydraulic action—yet the lower vertical or in-
clined surfaces will be rapidly eaten away, and in their
fall the higher snow-covered portions are soon involved.
The débris is partly swept into the engulfing sea, never
to be seen again—partly deposited as new shore-line,
varied in direction by secret ocean currents; and partly
left as high, secondary formations, constituting a rough
ramp,—cut by a hundred streams,—yet gradually rising
from plain to plateau. On the northern slope, looking
toward the vast interior, which received only the poor
precipitation coming southward from Arctic waters and
the scant meltings of the plateau's snows, the process of
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468
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