490-Million-Year-Old Trilobites Found in Volcanic Rock Shed Light on Earth’s Ancient Past

#shorts #Thailand #tuff #rock #fossils Scientists discovered 10 new species of ancient arthropods called trilobites in Thailand. The trilobites lived nearly half a billion years ago and could help us figure out where Thailand was located in the ancient supercontinent of Gondwana. The fossils were found in a tuff, which is a type of rock formed when ash from volcanic eruptions settles on the seafloor and is gradually compressed into solid rock. Researchers used radio isotope techniques to date the zircon crystals in the tuff and found that the trilobites dated back to around 490 million years ago. This is a rare find because not many places around the world have this type of rock. The researchers also found 12 types of trilobite that had never been discovered in Thailand, but had been found in other places. This could provide clues as to where the region would have been in relation to other countries when they were all part of Gondwana.

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