Many,but not all,of the larger plumes are situated along spreading centers,suggesting that plumes may be instrumental in the formation of rifts and the origin of new spreading centers.

• 很多的，但不是所有的较大的地慢羽沿着扩张中心分布开来，说明地慢羽在裂隙形成和新扩张中心的诞生中可能是起作用的。