动物尸骸只有在极其特殊的自然环境下才能保存为化石。5亿多年前的云南滇东、滇中,包括黔西、两广一带都是浅海,容易集聚泥质沉积物。那个时候,气候温暖,海水矿物质变得丰富,水母、蠕虫、节肢动物、多门类的海栖动物和藻类大量出现。它们突然被水流或者其他意外涌来的泥质沉积物掩埋,造成了大规模集体死亡。又隔绝了空气,在不再遭受外界破坏的条件下,软体保存在泥沙中,天长日久形成了薄薄的化石,奇迹般 Animal bones can only be preserved as fossils under extremely unusual natural conditions. More than 500 million years ago Yunnan Yunnan, Yunnan, including Qianxi, Guangdong and Guangxi are shallow sea, easy to gather muddy sediments. At that time, the climate was warm and marine minerals became abundant. Many jellyfish, worms, arthropods, and many species of marine animals and algae emerged. They were suddenly buried by water currents or other unexpected muddy sediments, causing massive mass deaths. And separated from the air, no longer subject to external damage under the conditions of the software stored in the sediment, the eternal fossils formed a miraculous