A Complete Collection of 100000 Whys
Fav十万个为什么
为什么地质有层理？
1、沉积作用：地质层理主要由沉积作用形成，不同时间沉积的物质会形成不同的层，就像书页一样一层层堆叠。
2、环境变化：沉积环境的变化（如水流速度、气候改变）会导致沉积物的类型和颗粒大小变化，形成不同的层理。
3、生物活动：生物活动（如贝壳、植物遗骸）的沉积也会形成层理，这些生物遗骸在不同时期沉积，形成分层结构。
4、压实作用：随着时间推移，上层沉积物的重量会压实下层沉积物，使不同层的物质密度和排列方式发生变化，形成层理。
5、地质运动：地壳运动（如地震、褶皱）会改变原有层理的形态，但不会消除层理，反而可能使层理更加明显。
总之，地质层理是地球长期沉积、环境变化、生物活动和地质运动共同作用的结果，是地球历史的重要记录。
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