在加拉帕戈斯裂谷，两地质板块下面的火山活动使地壳更新。
At the Galapagos Rift, volcanic activity beneath two geologic plates renews the earth's crust.
日本位于几个地质板块的交界处，经常受到不同等级的地震的侵袭，偶然也会有火山爆发。
Japan, which lies at the intersection of several tectonic plates, is regularly rattled by tremors of varying strength, with volcanic eruptions not infrequent.
“我认识到现在谈论的很多文明正好位于主要地质板块的边界附近。”现在图森亚利桑那大学的佛思说。
"I realized that a lot of the civilizations we were talking about sat right along major tectonic plate boundaries," says Force, who is now affiliated with the University of Arizona, Tucson.
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