大多数沙漠河床通常是干燥的，但它们偶尔也会有大量的水流和沉积物。
Most desert streambeds are normally dry, but they occasionally receive large flows of water and sediment.
在特提斯海留下的沉积物中发现了另一种早期鲸鱼龙王鲸的几具骨架，它们现在暴露在撒哈拉沙漠中。
Several skeletons of another early whale, Basilosaurus, were found in sediments left by the Tethys Sea and now exposed in the Sahara desert.
现时在平洲所见的岩石，是当时沙漠边缘一个湖泊中的沉积物。
Rocks now seen on the island of Ping Chau represent sediments laid down in a lake on the edge of a desert.
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