他们发现了微型海洋植物的化石，表明该地区曾经是开放的海洋，而不是坚固的冰层。
They found fossils of microscopic marine plants which suggest that the region was once open ocean, not solid ice.
较古老的冰川物质层之间是发育良好的土壤，它含有（生活在）温暖气候中的植物的化石。
Between the older layers of glacial material were well-developed soils containing fossils of warm-climate plants.
在从冰下的固体物质中收集的样本中，他们发现微型海洋植物的化石，这表明这个区域曾经是开阔的海洋而不是坚硬的冰。
Within samples collected from the solid substances lying beneath the ice they found fossils of microscopic marine plants which suggest that the region was once open ocean not solid ice.
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