第五讲岩浆活动与火成岩一、从地壳的裂缝中喷发出熊烈的“火焰”在第二讲中,我们着重的谈过了风化侵蚀作用对地球外貌的影响,现在让我们再来谈一谈地球内部的情况。也许你曾经有过这样的疑问:“地球的内部究竟是什么呢?”“我们怎样才能知道它内部的情况呢?”“它的内部是否和外表一样也在变化着呢?”……是的,这许多令人难以思议的问题,在几百年甚至几千年前,就有过许许多多人在问着自己。直到地质科学 Lecture 5: Magmatic activity and igneous rock I. The “flame” of fire that erupted from the cracks in the earth’s crust In the second lecture, we focused on the effect of weathering and erosion on the appearance of the earth. Let us now turn to another talk The situation inside the earth. Perhaps you once had the question: “What exactly is the interior of the earth?” “How can we know the situation inside it?” “Is its interior changing just as it looks?” ... Yes, There are so many incredible questions that many people are asking themselves in a few hundred or even thousands of years ago. Until geological science