Southern Tibet : vol.7 / 514 ページ（カラー画像）

0514	Southern Tibet : vol.7
南チベット : vol.7

and the regions about the Pángkong lake», though Ling-si-tang, at least, hardly can
be said to belong to the area of the Shayok. He states that to the north of the
great Zánskár Range glaciers do not occur in any force till the Mustagh or Kara-
korum Range is reached, which he regards as the watershed between the Indus and
the Turkestan river systems. There is a »complete network of glaciers» on the
southern side of this »stupendous mountain barrier, and some of the glaciers, as the
Biafo and Braldu are only exceeded in size by the Humboldt Glacier of Greenland.
Lydekker says these glaciers were »already fully described by Godwin-Austen and Drew».¹
As to the lakes he expresses the following opinion: »Along the shores of the
Pángkong lake, as has already been incidentally mentioned, very similar deposits are
to be met with, and also traces of old marginal beaches, indicating that the lake
formerly stood at a much higher level than at present. The other large existing
lakes afford very similar evidences. The waters of many of these lakes are now more
or less saline, and without outlet; but there is abundant evidence to prove that they
were formerly sweet, and that streams flowed from them carrying off the surplus waters.»
For the geological description of the rocks of Chang-chenmo, Ling-si-tang and
Lokshung Lydekker refers to Stoliczka and Drew. This is also the case with the
Kara-korum road and the Kara-korum Pass.
The work of Lydekker is accompanied by a Geological Map of the Káshmir
& Chamba Territories and Khágán. This was no doubt the very best geological map
then existing of these regions so difficult of access. Compared with the beautiful map of
H. H. HAYDEN in A Sketch of the Geography and Geology of the Himalaya Mountains
and Tibet, Part IV, 1908, it shows that the progress of our geological knowledge of the
Kara-korum Mountains has been very slow. The principal features of both these maps
have been entered on Professor Anders Hennig's Karte B in Vol. V of this work.
On Lydekker's map the Kara-korum Pass, Daulet Bek-öldi and Kisil-unkur are
situated in the Supra-kuling series of the Zánskár System belonging to Jura and Trias.
The sharp bend of the river Shayok, just east of the Shayok village, and nearly the
whole Chang-chenmo valley and the region south of it, are situated in traps and
sedimentaries of the Panjál System being of Silurian and, possibly, Cambrian age.
North of the Chang-chenmo and the whole way up to Ling-si-tang we find three more
or less parallel belts of the same Supra-kuling series as mentioned from the region
south and S. E. of the Kara-korum Pass, only interrupted along the Kograng valley
and in the range of Chang-lung-yogma by two belts of the carboniferous Kuling series
of the Zánskár System. The belts of different specimens of rock along the Chang-
chenmo—Chang-lung road seem to correspond to similar specimens along the Kara-
korum road, and to have the same N. W.—S. E. stretching as the mountain ranges.

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

引用情報

OCR読み取り結果

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

引用情報

OCR読み取り結果

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