dinal valley has raised itself up to the shoulder of the crest of the Tschimen-tagh. After the denudation and filling up, taken in conjunction with the retrogressive erosion in the transverse glen of Kum-bulak, have in this manner been operative for a sufficient length of time, it is easy to suppose that the latitudinal valley will make a new exit for itself through the gorge of the Kum-bulak, instead of reaching the Tschimen valley, as it does now, by the same breach as the At-atghan.
The transverse glen of Kum-bulak descends northwards from the flat pass by short steep windings, having minor granite mountains on the right; drift-sand has accumulated on the left side of the glen. In some places the defile plunges steeply over the granite thresholds that lie athwart it. It is in this wild and picturesque glen that the Kum-bulak or Sand Spring gushes out; it had filled the narrow rocky bed of the torrent with massive sheets of ice. Here, where the drift-sand came to an end, we pitched Camp LXXXVII (alt., 4051 m.). Contrary to what we found in the glen of Savughluk, where the drift-sand has accumulated in the very lowest part of the glen, we find here, that it only occurs in the highest part, the difference being ascribable to the very different form and structure of the two glens. There is however this resemblance between them, that in both glens alike the sand is piled up on the left or western side.
This day's march led us through coarsely crystalline rocks, principally red and grey granite.
November 24th. Immediately below the spring the glen brook is excessively narrow, and here we had carefully to lead the horses over to the left side across a rocky threshold in the bed, as well as carry the baggage ourselves for a short distance. The scenery was in a high degree picturesque and attractive, the granite cliffs sometimes descending perpendicularly into the glen. It is indeed astonishing that the wild and towering masses of rock through which the transverse glen has sawn its way can belong to the same mountain-range as that which we had lately seen from its southern side as a rather insignificant chain. And the farther we des-
IIIFカラー高解像度
