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HandWiki. Phanerozoic. Encyclopedia. Available online: https://encyclopedia.pub/entry/28402 (accessed on 15 September 2026).
HandWiki. Phanerozoic. Encyclopedia. Available at: https://encyclopedia.pub/entry/28402. Accessed September 15, 2026.
HandWiki. "Phanerozoic" Encyclopedia, https://encyclopedia.pub/entry/28402 (accessed September 15, 2026).
HandWiki. (2022, October 08). Phanerozoic. In Encyclopedia. https://encyclopedia.pub/entry/28402
HandWiki. "Phanerozoic." Encyclopedia. Web. 08 October, 2022.
Phanerozoic
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The content is sourced from: https://handwiki.org/wiki/Earth:Phanerozoic

The Phanerozoic Eon is the current geologic eon in the geologic time scale, and the one during which abundant animal and plant life has existed. It covers 541 million years to the present and began with the Cambrian Period when animals first developed hard shells preserved in the fossil record. The time before the Phanerozoic, called the Precambrian, is now divided into the Hadean, Archaean and Proterozoic eons. The time span of the Phanerozoic starts with the sudden appearance of fossilized evidence of a number of animal phyla; the evolution of those phyla into diverse forms; the emergence and development of complex plants; the evolution of fish; the emergence of insects and tetrapods; and the development of modern fauna. Plant life on land appeared in the early Phanerozoic eon. During this time span, tectonic forces caused the continents to move and eventually collect into a single landmass known as Pangaea (the most recent supercontinent), which then separated into the current continental landmasses.

life on land geologic time evolution

References

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