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  2. Hadean - Wikipedia

    en.wikipedia.org/wiki/Hadean

    The Hadean (/ h eɪ ˈ d iː ə n, ˈ h eɪ d i ə n / hay-DEE-ən, HAY-dee-ən) is the first and oldest of the four known geologic eons of Earth's history, starting with the planet's formation about 4.6 billion years ago [4] [5] (estimated 4567.30 ± 0.16 million years ago [2] set by the age of the oldest solid material in the Solar System — protoplanetary disk dust particles — found as ...

  3. History of Earth - Wikipedia

    en.wikipedia.org/wiki/History_of_Earth

    The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth

  4. Geological history of Earth - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_Earth

    During Hadean time (4.6–4 Ga), the Solar System was forming, probably within a large cloud of gas and dust around the Sun, called an accretion disc from which Earth formed 8] The Hadean Eon is not formally recognized, but it essentially marks the era before we have adequate record of significant solid rocks.

  5. Ancient crystals reveal the earliest evidence of fresh water ...

    www.aol.com/ancient-crystals-reveal-earliest...

    The Hadean Eon, from 4.5 billion to 4 billion years ago, is the earliest chapter in Earth’s history and a geological dark age that’s little understood because geologists simply don’t have ...

  6. Timeline of natural history - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_natural_history

    c. 4,533 Ma – Hadean Eon, Precambrian Supereon and unofficial Cryptic era start as the Earth–Moon system forms, possibly as a result of a glancing collision between proto-Earth and the hypothetical protoplanet Theia (the Earth was considerably smaller than now, before this impact). This impact vaporized a large amount of the crust, and sent ...

  7. Early Earth - Wikipedia

    en.wikipedia.org/wiki/Early_Earth

    Early Earth also known as proto-earth is loosely defined as encompassing Earth in its first one billion years, or gigayear (Ga, 10 9 y), [1] from its initial formation in the young Solar System at about 4.55 Ga to some time in the Archean eon in approximately 3.5 Ga. [2] On the geologic time scale, this comprises all of the Hadean eon, starting ...

  8. Timeline of geology - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_geology

    1779 – Comte de Buffon speculates that the Earth is older than the 6,000 years suggested by the Bible; 1785 – James Hutton presents paper entitled Theory of the EarthEarth must be old; 1799 – William Smith produces the first large scale geological map, of the area around Bath

  9. A New Theory Offers an Explosive Explanation for Earth's ...

    www.aol.com/lifestyle/theory-offers-explosive...

    A new scientific theory connects mysterious structures deep within Earth's mantle to a violent collision with the protoplanet Theia. A new scientific theory connects mysterious structures deep ...