merge into the great valley-floor. It is essentially a valley of deep loess accumu. lation, a grassy settling ground of dust blown up from the Kizil Kum. On the other hand, its great dust-beds undoubtedly alternate in depth with the flood-plain deposits of its cross-streams. Out of ten days, during seven there was a
Fig. 448.—Fish Traps of the Kizil Su.
Fig. 449.-Silk Factory in Karategin.
yellow haze, and of these days two were so gloomy that a few hundred yards was the range of vision. It is, therefore, a region of still living loess. The kurgans and burial mounds left by its more ancient inhabitants are now mantled with 2 feet or more of loess.
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