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Vedmedyk [2.9K]
4 years ago
14

When did abundant fossil evidence first appear in the geologic record?

Geography
2 answers:
lukranit [14]4 years ago
6 0

Answer:

540 million years ago

Explanation:

Cryogenic is a geologic period dominated by glaciers and occurring prior to the Cambrian, when the fossil record shows a so-called explosion of most major groups of complex animals, including all the bilaterians (animals with a left and right side, unlike corals and sponges) — around 530 million years ago.

Ede4ka [16]4 years ago
5 0
Three billion years ago, according to National Geographic
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