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
| i66 | TO NGANGTSE-TSO. | |
| in a meridional direction. On our road to Nganglse-tso, we had to cross two passes, Gyanglam-la and Laen-la, the latter also pronounced Laë-la. The customary road to Shigalse, passes just east of the lake. Nganglse-tso was said to be larger than Dangra-yum-/so, information that was not in accordance with what I saw and heard later on at the Targo-isangpo. They reckoned the Ngangtse-tso to be three days long, and six or seven days around, if travelling with yaks. From west to east and vice versa, one could not see the opposite shore — an obvious exaggeration. From Camp XCV, Pan. 1 1 2, Tab. 20, was taken, which is very much like the one from the second pass, Pan. 1 1 1 , though both the vertical and the horizontal angles, of course, have changed a little. In this new perspective, the snow-covered Chaga Peak assumes a more dominating appearance. On December 26/11 our march was 11 km. S. S. E. Both end-points of the march had about the same height. Camp XCV being 4,828 m., and Camp XCVI 4,824 m. high. Two passes were crossed, the Gyanglamz-la, having an altitude of 4,922 m., and the Laen-la of 4,933 m. Near Camp XCV we cross a valley from the west, and a series of small erosion beds. They all join in a watercourse piercing the small hills to our left. In an open valley, we approach the first pass. Just before reaching it, Pan. 1 1 o, Tab. 19, was sketched, again showing the Dumbok-tso, the Tso-ri and some of the surrounding mountains. To the N. 17° E., we now see the mouth of a valley, through which, in summer, a good deal of water was said to come down to the lake; this river was called Damrap-chu. From Gyanglanz-la we had, to the S. S. E., a semi-circular trough surrounded by mountains from which many watercourses, some of them joining one another, go down to the lake, all dry now and even without ice. On the plain at the base of these hills, were numerous herds of kyangs and Gazella-antelopes, as well as hare. Only two tents were passed in a valley to our right. With hills on both sides, we follow the erosion valley of the pass down to the plain, where the height is 4,791 m. At some places this erosion bed is canon- shaped, being less than 2 m. broad and 3 m. deep with perpendicular or even overhanging sides. The rock is sandstone. At four places we passed living rock. The first was just north of Gyanglam-la, being greenish grey sandstone schist. The second some kilometers farther on, being white quartzitic sandstone or quartzite with brown patches, and the third, near Laen-la, being greyish green sandy schist. Here the road turns to the S. W. and we follow a shallow valley to the pass, Laen-la, a flat easy threshold where dark grey hard and calcareous phyllitic argillaceous schist crops up at both sides of the saddle. One kilometer N. E. of Laen-la, Panorama 107, Tab. 19, was sketched. From here, the Dumbok-lso proper cannot be seen, but a large part of the even white floor of the depression is visible as well as most of the Tso-ri. The Chaga Peak has nearly the same pyramidal shape as on the last | ||
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