沉积物被从两侧的弧前脊和岛弧冲到盆地，使该处地壳承重增加，形成洼地。
Sediments washed into the basin from both the fore-arc ridge and island arc weigh down the crust in this area, creating the depression.
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。
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.
大约两周前，这条死去的南露脊鲸被冲到位于开普敦南部40公里处宁静的Kommetjie海滩上。
The dead southern right whale washed up onto the quiet Kommetjie beach, 40 km (25 miles) south of the country's top tourist city nearly two weeks ago.
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