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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| 0132 |
Southern Tibet : vol.2 |
| 南チベット : vol.2 |
引用情報
OCR読み取り結果
CHAPTER XIV.
RICHARD STRACHEY.
A new important addition to our knowledge of the lakes was given by Sir
RICHARD STRACHEY in the narrative of his journey in September 1848, which he
accomplished in company with Mr J. E. WINTERBOTTOM. The results were published
in full more than fifty years after his journey.¹ He started from Milam and took
the road of Topi Dunga, Laptel, Shangcha, Tisum, from where he emerged on the
plain of Guge. In the upper part of the valley of Gori he came upon the base of
the great fossiliferous series of rocks which constitute the ranges over which the
passes into Tibet are situated. Richard Strachey called this line of elevation the
Indian Watershed of the great Tibeto-Himalayan tableland. At Tisum he found
that the plain of Guge appeared to be quite flat and open for some 10 miles
to the north, but it ended abruptly on the south. The Jankum river had cut out a
huge furrow from the plain with sides sloping about 45°. The ravines, 200 or 300
feet in depth, opened up sections of the plain showing that it consisted of a great
deposit of gravel and boulders and sand. The surface of the plain was found to slope
towards the Satlej and the beds were deposited parallel to the surface. As he descended
he found that the alluvial beds rested on shales and shaly limestones which generally
dipped to the N. W. Boulders and pebbles in the river bed consisted mostly of cal-
careous rocks but a notable proportion were composed of porphyries, only one or
two specimens of granite being seen. In the shales near the Satlej he found an
Ammonite and Inoceramus showing that the strata were either Jurassic or Cretaceous.
He deals with the hot springs of Tirtapuri and Kiunglung, although he did not
visit them personally. On the road from Ligchephu to the Darma Yankti he finds
a great difference between the rivers in the eastern and western parts of Guge. The
western flow in very deep ravines, whereas the eastern are shallow, about 25 feet
only below the surface of the plain. This difference he finds to depend upon the
increasing depth of the bed of the Satlej on its way towards the west and upon
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249
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269
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279
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289
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305
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323
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334
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345
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356
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367
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381
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393
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403
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415
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428
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445
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461
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473
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487
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503
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517
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532
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