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Fav十万个为什么
为什么化石多在沉积岩中发现？
化石多在沉积岩中发现主要是因为沉积岩形成过程有利于生物遗骸保存、其层状结构便于化石形成且分布广泛，而岩浆岩和变质岩的形成过程通常不利于化石保存。
1、沉积岩由泥沙、有机物等沉积物经压实、固化形成，其形成过程温和，有利于生物遗骸的完整保存和化石的形成。
2、沉积岩通常具有层状结构，这种结构为化石的形成提供了良好的条件，且层状结构便于化石的发现和研究。
3、沉积岩分布广泛，覆盖地球表面大部分地区，且沉积环境多样，包括河流、湖泊、海洋等，这些环境都是生物活动和遗骸沉积的理想场所，因此沉积岩中更容易发现化石。
4、岩浆岩由岩浆冷却凝固形成，高温环境会破坏生物遗骸，不利于化石的形成。
5、变质岩由原有岩石在高温高压下变质形成，其形成过程中的高温高压条件也会破坏原有化石。
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