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  1. Phanerozoic

    Fourth and current eon of the geological timescale

    The Phanerozoic is the current and the latest of the four geologic eons in the Earth's geologic time scale, covering the time period from 538.8 million years ago to the present. It is the eon during which abundant animal and plant life has proliferated, diversified and colonized various niches on the Earth's surface, beginning with the Cambrian period when animals first developed hard shells that can be clearly preserved in the fossil record. The time before the Phanerozoic, collectively 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 fossilised evidence of a number of animal phyla; the evolution of those phyla into diverse forms; the evolution of plants; the evolution of fish, arthropods and molluscs; the terrestrial colonization and evolution of insects, chelicerates, myriapods and tetrapods; and the development of modern flora dominated by vascular plants. Wikipedia

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  2. britannica.com

    Nov 25, 2024Phanerozoic Eon, the span of geologic time extending about 541 million years from the end of the Proterozoic Eon (which began about 2.5 billion years ago) to the present. The Phanerozoic, the eon of visible life, is divided into three major spans of time largely on the basis of characteristic
    Author:The Editors of Encyclopaedia Britannica
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  4. geo.libretexts.org

    Learn about the Phanerozoic Eon, the time period of life with visible fossils, and the Paleozoic Era, the first era of the Phanerozoic. Explore the geologic history, evolution, and extinctions of the Paleozoic Era.
  5. allthescience.org

    May 21, 2024The Phanerozoic Eon is a geologic time division that extends from roughly 542 million years ago until the present. The name derives from Greek and means "revealed life," because the Phanerozoic Eon is defined as the period of time during which hard-shelled macroscopic multicellular organisms, beginning with trilobites, archaeocyatha, and a ...
  6. newworldencyclopedia.org

    The Phanerozoic eon is the interval of geologic time from 542 million years ago to the present, marked by the appearance of abundant, macroscopic, hard-shelled fossils. It is divided into three eras: Paleozoic, Mesozoic, and Cenozoic, each with distinct features and events in the history of life on Earth.
  7. sciencedirect.com

    The Phanerozoic is the eon we are living in. It started 541 Ma ago and it is generally divided into three eras: Paleozoic, Mesozoic, and Cenozoic. During the Phanerozoic, modern plate tectonics was operative and the Earth's climate stabilized, allowing complex life to diversify and evolve. Phanerozoic stands for "visible life."
  8. encyclopedia.pub

    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 ...

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