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0594 Southern Tibet : vol.3
南チベット : vol.3
Southern Tibet : vol.3 / 594 ページ(カラー画像)

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doi: 10.20676/00000263
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RÉSUME OF THE NORTHERN ROAD.

The itinerary from Teri-nam-tso to Nganglaring-tso which I have described in
the preceding pages does not, as might be believed at first sight, simply follow the
northern edge of the Central Transhimalaya. On the contrary, it also helps us in a
very essential way to clear up the complicated orography of the system. From this
point of view, the northern itinerary is of incomparably higher value than the itinerary
in the valley of the upper Tsangpo, which not only tells us nothing about the
orographical arrangement, but rather gives us a false impression, for the innumerable
buttresses and mountain shoulders, which, in reality, belong to different ranges, all
seem to belong to one long range along the northern bank of the Tsangpo and
Raga-tsangpo. The northern itinerary, on the other hand, crosses at least five diff-
erent ranges of the Central Transhimalaya.

The most characteristic law in common for all these ranges is their stretching
from N.W. to S.E. Two of them, Surla and Pedang, are even meridional in their
northern parts. The Teri-nam range which was crossed in two passes and is pierced
by the Soma-tsangpo, stretches W.N.W.—E.S.E. The N.W. part of the Lapchung
range, which comes to an end at Tarok-tso, is a boundary, at the N.E. side, of the
lower course of the Buptsang-tsangpo, while the upper course of this river is bounded
by the western half of Kanchung-gangri. The high and well defined range of
Lunkar, which was crossed in Lunkar-la, was determined in the whole of its course
by my fifth line of crossing, along the Buptsang-tsangpo and over Samye-la; this
range is in immediate connection with the Lunpo-gangri, to which belong the highest
peaks of Transhimalaya, except Nien-chen-tang-la, the same which had been measured
by Wood from the south. The Lunpo-gangri seems to continue in the mountains
north of Saka-dsong, and then in the Chomo-uchong group and, finally, in the range
situated between the Raga-tsangpo and the Tsangpo. At Ladse-dsong, this range
is pierced by the Tsangpo and, further east, seems to follow the southern bank of
the Tsangpo. As far as I have been able to make out, this is the only example
where the Tsangpo does not form the southern boundary of the Transhimalaya, which
is also in accordance with Col. Burrard's view, for the southern branch of this Kailas
range is pierced by the Tsangpo.