地质学家告诉外福来:每块岩石都有生命,它们会生成、损坏、转化。这是真的吗?外福来恨不得马上就能了解岩石的生命史。“叔叔,这块花岗岩是怎么形成的?它的生命又是怎么发展的呢?”“你还真是个急性子。虽然岩石的面貌千变万化,种类也非常多,形态、结构、颜色各异,但是为了方便研究,地质学上还是按成因将其分为三大类:沉积岩、火成岩和变质岩。我们来看看这三类岩石分别是怎么形成的吧。” Geologists tell the outsider to come: Every rock has life, they will be generated, damaged, transformed. Is this true? Outer Fight can not wait to understand the life history of rocks. “” Uncle, how did this piece of granite form and how did its life develop? “” You are really an acute child .Although the ever-changing rock variety, the type is also very much, the shape, structure, color different , But in order to facilitate the study, geology is still divided into three categories according to their causes: sedimentary rocks, igneous rocks and metamorphic rocks. Let’s see how these three types of rocks are formed.