Southern Tibet : vol.7 / 805 ページ（白黒高解像度画像）

0805	Southern Tibet : vol.7
南チベット : vol.7

0805

Southern Tibet : vol.7

南チベット : vol.7

581

of Chib-chang-tso, traversed by BONVALOT and ROCKHILL, and still farther east it
merges into the mighty Tang-la system. Much of the deduction given above is
conjectural, but still it seems very probable that the Kara-korum Pass is situated
in the same series of crustal folds as is the mountain system which in the east of
Tibet is called Tang-la.

The Aghil Range which is the next fold in the series, is more difficult to
determine than the Kara-korum folds. BURRARD says of it: »But little is known of
the Aghil range; it was discovered by Sir Francis Younghusband, and a few of its
peaks have been observed by surveyors; but its length and direction have not been
determined. The position given to it on the frontispiece to Part I and its junction
with the Sarikol range are conjectural. The peaks observed between the Kuen Lun
and Karakoram ranges along the upper courses of the Yarkand river appear to be
scattered rather than aligned, and the region seems to resemble in complexity that
between the Indus and Kunar rivers.— It may be that the Kuen Lun, Aghil and
Kara-korum folds have been pressed against one another; all the ranges of Tibet
tend to converge at the north-western corner of the plateau, as though they were
trying to escape through the neck of a bottle; once having passed the neck they
separate again, but during the passage they appear to suffer from extreme com-
pression.«¹

So much is sure; that an Aghil fold exists in the north-western corner of the
Tibetan highland, and it probably continues through the whole of Central Tibet.
But another matter is to determine the connection between YOUNGHUSBAND's and
BURRARD's Aghil Range and the prolonged system of folds running just north of
the North Kara-korum system. For instead of a continuous range or system of
ranges, we come across the interruption caused by the plains of Ling-shi-tang and
Aksai-chin, which in the region east of the upper Kara-kash occupies the entire
space between the North Kara-korum and the Southern Kwen-lun. It is therefore
only by conjecture that we may try and find a connection between the folds west
and east of the plateau plains. The Aghil Range itself is crossed by the Kara-
korum road and pierced by the upper Kara-kash River, though with our present
knowledge it will be difficult to tell where these intersections take place. I have
the impression that the Aghil Range is double even before reaching the meridional
valley of the upper Kara-kash. The latitudinal valley which I followed from the
Dapsang Pass eastwards in the last days of December 1907, crosses the southern
range and is in its eastern part situated between both ranges. East of the upper-
most Kara-kash the southern range has two peaks of respectively 6388 and 6308 m.,
probably measured by Indian surveyors. After the interruption of Ling-shi-tang,

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