Question

Fossil records of vertebrates were found first in the rocks of

Answer 1

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Answer:

=> Ordovician Period

Explanation:

=> Fossil records of vertebrates were found first in the rocks of Ordovician Period.

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Answer 2

Fossil records of vertebrates were found first in the rocks of

• The oldest fossilised vertebrates were fish with thick armour that were found in rocks from the Ordovician Period, between 500 and 430 Ma (megaannum, million years ago).
• Vertebrate animals are those with backbones. Reptiles, amphibians, fish, birds, and mammals are among them. Vertebrate fossils, such as dinosaur, camel, and saber-toothed tiger skeletons, are widespread in Mesozoic and Cenozoic strata in many western states. Usually, sedimentary rocks include fossils, though rarely, low-grade, fine-grained metamorphic rocks will as well.
• About 450 million years ago, in the late Ordovician, vertebrates seem to have first appeared. Although the majority of Ordovician fossil vertebrates are scarce and incomplete, evidence from other fossils suggests that several lineages of armoured jawless fish as well as the predecessors of sharks and jawed fish were present.
• The Chengjiang biota contains the oldest known animals, which lived about 518 million years ago. These include Myllokunmingia, Zhongjianichthys, Haikouichthys, and maybe Haikouella.

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