岩石随处可见,它构成了地球的表层——地壳。岩石记录了地亮变迁的历史,是一部没有文字的史书。要认识地球就得从识别岩石开始。目前,已知的岩石种类不下万种之多,精确地区分岩石需要用精密仪器或显微镜。但概略鉴别时,凭肉眼观察岩石的某些特征也可以识别岩石的种类。现介绍一种识别岩石的简易方法。 一、岩石大类的区分 众所周知,岩石按成因分为沉积岩、岩浆岩和变质岩三大类。根据岩石的“构造”可以粗略区分它们,所谓构造是指岩石的外貌,它反映了岩石的成 Rock everywhere, it constitutes the Earth’s surface - the crust. The rock records the history of the change of the earth, is a history book without words. To recognize the earth you have to start by identifying rocks. At present, no fewer than 10 species of rock are known and the precise distinction between rocks requires the use of precision instruments or microscopes. However, at the time of general identification, certain features of the rock can be visually identified to identify the type of rock. Now introduce a simple way to identify rocks. First, the distinction between rock categories As we all know, the rock is divided into sedimentary rocks, magmatic rocks and metamorphic rocks by three major categories. According to the rock’s “structure” can be a rough distinction between them, the so-called structure refers to the appearance of the rock, which reflects the rock into