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0124 The Pulse of Asia : vol.1
アジアの鼓動 : vol.1
The Pulse of Asia : vol.1 / 124 ページ(カラー画像)

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doi: 10.20676/00000233
引用形式選択: Chicago | APA | Harvard | IEEE

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single great uplift, with more or less buckling of the crust
into long swells. The minor, albeit to the traveler the most
impressive features, such as valley, ridge, and peak, appear
to be wholly the product of aqueous, supplemented by
glacial erosion. On every side of Chinese Turkestan, as
appears from my own observations and those of others, the
so-called mountains are in reality plateaus of comparatively
slight relief except on the edges. Potentially, to be sure,
they are mountainous, for they have the necessary elevation,
and the typical contorted rock structure. In time they must
be cut to pieces by rain and rivers, and must assume forms
like those of the Alps, where few or no traces of a plateau
can be detected. On the whole, the Karakorum plateau
and the other plateaus of Central Asia strongly support the
new geological view that the great mountain systems of
the world originate as plateaus, that is, as uplifted blocks
or arches of the earth's crust, which are raised up not as
individual ranges, but as broad regions, to be carved later
into the form to which we usually apply the name of
mountains.

The descent from my mountain and the little bird was
easy, as I slid on the snow for nearly two thousand five
hundred feet. The bird was probably a migrant on the way
to Turkestan. Henderson, the only ornithologist who has
ever worked in the country, says that some of the most
delicate of the birds of India, little warblers with the most
wavering, uncertain flight, cross the cold plateau of Kara-
korum to spend the summer in Chinese Turkestan. It is
marvelous that such seemingly impotent creatures should
be able to cross two hundred miles of bleak desert amid