题目

题型：综合题难度：一般来源：同步题

对比“世界主要山脉分布图”，完成下列问题。 
（1）世界上高大山脉的分布地带与火山地震带的分布是否一致？为什么？
                                                                                                                                                                 
                                                                                                                                                                 （2）我国哪些地区多火山地震？为什么？
                                                                                                                                                                   
                                                                                                                                                                    （3）尝试解释我国东部地区山脉的延伸方向为什么与海岸线相平行？
                                                                                                                                                                   
                                                                                                                                                                   

答案

（1）分布是一致的。因为高大山脉的形成基本上是板块挤压形成的，都在板块的交界地带。而板块交界地带地壳不稳定，也正是火山地震的多发地带。（2）我国的太平洋沿岸地带、喜马拉雅山、昆仑山地带多火山和地震，它们正好处在地球上环太平洋火山地震带和地中海- 喜马拉雅地震带上。（3）我国海岸线基本上处于太平洋板块和亚欧板块的交界地带，两大板块互相挤压，形成了东部山脉。