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0063 Explorations in Turkestan : Expedition of 1904 : vol.2
トルキスタンの調査 1904年 : vol.2
Explorations in Turkestan : Expedition of 1904 : vol.2 / 63 ページ(カラー画像)

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[Figure] 459 ゼラフシャン氷河の縁の略地図 (R=くぼみ)Sketch-map of the End of the Zerafshan Glacier (R=Recession).

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doi: 10.20676/00000178
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miles below, and that from cutting-down of its channel. It may therefore be assumed that in total its deposits throughout glacial time till now are mostly of glacial origin, and that the loess derived from it was mostly fine stuff of glacial grinding. In fact, one may attribute a large part of Central Asia's loess to wind-work over the flood-plains of glacial alluviation, especially those of earlier epochs.
The loess steppe of Samarkand has been warped up into a dome about 40 miles across and 100 feet high in the middle and dissected by old distributaries and irrigation canals of the Zerafshan, some of which, notably the Dargun (fig. 461), cross and join again beyond. The interesting structure thus exposed in clean sections up to 100 feet in height reveals an interlapping of pure loess of vertical cleavage