Question

When did abundant fossil evidence appear in the geologic record?

Answer 1

Answer:

Around 540 million years ago.

Explanation:

approximately 540 million years in the past we entered the Phanerozoic era, the place existence became complicated. It began with the "Age of Trilobites." The Cambrian Explosion of existence happens; all existent phyla advance. Many marine invertebrates (marine animals with mineralized shells: shell-fish, echinoderms, trilobites, brachiopods, mollusks, primitive graptolites). First vertebrates. Earliest primitive fish. gentle climate. The supercontinent Rodinia began to break into smaller continents (no correspondence to well-known-day land plenty). Mass extinction of trilobites and nautiloids at end of Cambrian (50% of all animal families went extinct), probable using glaciation. previous to that became the Proterozoic Eon, which began approximately 2.5 billion years in the past. all of us comprehend that there became easy multicellular existence, however the "abundant" fossil evidence first happens in the Paleozoic era (the 1st era of the Phanerozoic Eon).