IIIFカラー高解像度
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
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| IIIFカラー高解像度 |
| Southern Tibet : vol.4 | |
| 南チベット : vol.4 |
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引用情報
iMï
68
IN THE LATITUDINAL VALLEY SOUTH OF THE KWEN-LUN.
single yapkak plant there is a little ridge of coarse sand remaining as a testimony
of the prevailing W. S. W. wind.
A short distance farther S. E. there is a second erosion furrow, broad and shallow and with some poor grass at its southern side. Probably both these beds join. From the second bed the ground slowly rises again amongst very flat hills crossed by dry, shallow beds. We reach a low threshold 5,055 m. high. From it a comparatively narrow valley goes down, cut through grey, dense limestone cropping up at some places. Farther down in the same valley there was quartz sand with cement of calcspar. At the foot of the hills a dry brook was directed to the E. N. E., with which our valley joined. At Camp XXXVI there was not a drop of water nor had any been seen during the whole day's march. Near the camp a fox was seen, otherwise, only the usual ravens, obviously the same that had followed us for many days.
Pan. 5 I A and 503, Tab. 9, taken from Camp XXXVI shows, to the N. W. and north, the little range we had just crossed. To the N. 46° E. is a very distant mountain rising above the even line of the eastern horizon which continues uninterrupted to S. 75° E. and shows how very flat and open the country is in that direction. To the S. E. and south again, mountains are raising their irregular crests, but high mountains are nowhere in sight.
To Camp XXX VII the distance is only 8.7 km., and we are again rising 151 m. to 5,129 m., or at a rate of I :58. The plain we now are crossing is undulating, and its drainage bed is directed to the N. E. In front of us there is a new range, which we have to cross in a new pass; our course is, therefore, directed towards the part of its crest which seems to be the lowest. Grass again begins to appear in the barren landscape. It grows on a kind of platforms, about 1 m. high and consisting partly of gravel, partly of sand.
We enter the transverse valley coming from the next range. Its dry erosion bed is very extensive, 2 m. deep and about 200 m. broad, showing that a good deal of water occasionally goes down through it. In this bed finally a pool of water was found. As it had snowed during the night our position needed not to have been critical, even if no water had been found. Most of the snow had disappeared at I o o'clock a. m,, but at protected places some of it remained during the whole day. The northern slopes of the southern mountains also remained white.
The bed proved to come from a valley which, where it is at its narrowest, is only so m. broad between strongly eroded walls of living rock of grey limestone. Very low yak-grass and moss is growing here. In its bed, which is covered with sand and gravel, there is a little brook, which is mostly frozen, but has open running water at a few places. A little higher up, the valley narrows to a real gorge,
higher
4 or 5 m. broad between solid plates and slabs of limestone standing- vertically
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