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cover of episode What happens when paleontologists find a fossil?

What happens when paleontologists find a fossil?

2025/4/16
logo of podcast Moment of Um

Moment of Um

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Jameel Connor
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Jameel Connor: 我是芝加哥菲尔德博物馆的化石爬行动物副馆长,也是一名恐龙古生物学家。大多数化石都来自沙漠等地区,这是因为化石只能在沉积岩中形成。沉积岩是由细小的岩石碎片形成的,例如沙子形成砂岩,泥土形成泥岩。当这些沉积岩层形成时,如果动物死亡并落入堆积的沉积物中,它就可能变成化石。除了被困在琥珀中,这是化石形成的唯一方式。动物死后埋葬得越快,化石就越好。例如,蒙古有一个著名的化石,是迅猛龙和原角龙搏斗的场景,它们可能死于一个潮湿的沙丘坍塌中,迅速掩埋使得化石保存得非常完好。 在森林等潮湿环境中,动物遗骸容易腐烂,难以形成化石。通常情况下,你会发现一些破碎的化石碎片,你需要追踪到化石的来源,然后开始挖掘,看看它是否是一个孤立的化石碎片,或者是一具完整的骨骼的一部分。 挖掘化石是一个非常耗时的过程。根据岩石的硬度和化石的脆弱程度,可能需要很短或很长的时间。有时,对于大型恐龙骨骼,你可能需要数年时间才能将整个骨骼从地面挖出来。这就是为什么拥有一个优秀的团队非常重要的原因。

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Chapters
This introductory chapter sets the stage by presenting a dog's perspective on digging and discovering things underground, leading to a question about what happens when paleontologists find a fossil. It introduces the main topic and the expert who will answer the question.
  • A dog's curiosity about digging leads to the main question.
  • The episode focuses on the actions of paleontologists upon discovering fossils.
  • An expert paleontologist will provide answers.

Shownotes Transcript

Make no bones about it – fossils are super cool! But what do you do if you find a fossil? We asked Jingmai O’Connor, the Associate Curator of Fossil Reptiles at the Field Museum in Chicago, to help us find  the answer.

Got a question that’s buried in your brain? Send it to us at BrainsOn.org/contact), and we’ll help dig up the answer!