形成这些沉积物的河流实际上离一个叫做特提斯海的古代海洋不远。
The river that formed these deposits was actually not far from an ancient ocean known as the Tethys Sea.
地质研究表明，里海曾经是被称为副特提斯海的史前海洋的一部分。
Geological research indicates that the Caspian sea was once part of a prehistoric sea known as the Paratethys.
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.
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