THE TERRACES OF SISTAN. 297
rather than thousands of years, and which falls well within historical times. It is probable, as will be shown later, that the lake has stood twice at this level, but this inference is based on historical rather than physiographic evidence. This level seems to be that at which the lake would permanently discharge to the God-i-Zirrah through the Shila. Therefore the lake might be expected to return to this position
whenever it was abundantly supplied with water.
(3) The Sabazkim beach and bluffs.—The most remarkable of the old beaches
of Sistan lies in the northward-facing bay of Sabazkim, a mile and a half south of Aliabad, on the road from Seh-Kuheh to Kohuk. It is situated 12 miles from the lake, and is elevated but little above it, standing probably at the i 5-foot level. When the water filled Sabazkim Bay it must have covered most of that part of the Helinund delta which is to-day most thickly populated, although the ridges occupied
Fig. 171.—Abandoned Beach and lacust e[Blu at Sabazkim.At the base of the bluffs sand-dunes
by Zahidan and most of the other ancient ruins were probably out of water.
The shape and position of the bay exposed th full force
ofcOne Hundred and
currents generated by the fierce north-northwest
Twenty Days," and the result is seen in the size of the beaches. At the base of the highest of the Sabazkim bluffs, where the British Arbitration Commission has set up a monument, there is a beach, over 500 feet broad, with a rise of 20 feet (fig. 171). At the top of the beach rise large sand-dunes like those at Seh-Kuheh, and behind
these a very freshly eroded cliff rises perpendicularly
composed of fine gravel, the
(see section P, plate 5). The upper part of the
middle part of small cobble-stones and san~r or five the lake of which
sand. Everywhere the beach is crowded with shells of fou