...一点儿也不似陨石坑，不少科学家称它们为 由于这种地形一点儿也不似陨石坑，不少科学家称它们为 陨击盆地 陨击盆地(Impact Basin) (Impact Basin)。。
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Hellas impact basin 盆地
·2,447,543篇论文数据，部分数据来源于NoteExpress
Scientists think such inverted craters form when an impact basin fills with sediment and the material around that sediment gets eroded away.
科学家们认为，当撞击盆地被沉积物所填满，而沉积物周围的部分逐渐被侵蚀殆尽时，就会形成了类似这样的颠倒陨石坑。
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Now fast-forward to 2013, where in the past few weeks the Curiosity rover has been drilling into some different rocks half a planet away, inside a deep basin formed by the Gale impact crater.
CNN: Have a drink on Mars
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