Below us dark, gullied ridges held another half million years of sediments. Beyond them was the basalt, laid down when this vast plain was swamped in lava, 5.2 million years ago.
就在我们远眺处的下方，黝黑的沟状脊代表了另外一种50万年的沉积层，更远处铺满了玄武岩，520万年前，这块巨大的平原被淹没在火山岩浆之中。
In the process of extraction, according to the chief feature that the volcanic cones are situated in lava platform, the study area is classified as plain and mountain firstly.
在提取过程中，根据研究区内火山口均位于熔岩台地上的特点：首先，将研究区划分为平原和山地等地貌类型；
The colonists were desirous of reaching the plain upon which the superior cone of Mount Franklin had fallen, but the lava arrested their progress.
居民们想到富兰克林山较高的火山锥所坠落的那片平原上去，但是岩浆把他们拦住了。
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