By following thefossils, Smith was able to put allthe strata of England's earth into relative temporal sequence. █About the sametime, Georges Cuvier made the same discovery while studying the rocks aroundParis. █Soon it was realized that this principle of faunal(animal)successionwas valid not only in England or France but virtually everywhere. █It wasactually a principle of floral succession as well, because plants showed thesame transformation through time as did fauna. Limestone may be found in theCambrian or-300 million years later-in the Jurassic strata but a trilobite—theubiquitous marine arthropod that had its birth in the Cambrian—will never befound in Jurassic strata, nor a dinosaur in the Cambrian.

일단 purpose 질문이니깐

"흐름" 이 중요하다고 내가 인강에서 수도 없이 말했을거야.

저 내용이 다~~~~~~~~~~~~~ 그 흐름이야.

fossil 을 사용했기 때문에 strata 자체를 temporal sequence 로 정리할수 있었다

그 뒤에 내용들도 다~~~~~ 그 principle 이 얼마나 accurate 했고 다른지역에서도 똑같았다.

돌은 그럴수 없지만 "trilobite" 같은 경우(ex of fossil) 는 당연히 시간적인 순서에 따라서 배치될수 밖에 없지않아

그런 얘기지