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  1. Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System . Initially, Earth was molten due to extreme volcanism and frequent collisions with other bodies.

    • Geology

      The geological time scale encompasses the history of the...

    • History of geology

      The history of geology is concerned with the development of...

  2. La Tierra se formó hace unos 4600 millones de años por acumulación de la nebulosa solar, una masa de gas y polvo en forma de disco, residuo de la formación del Sol, de la que también se creó el resto del sistema solar.

  3. Modern geologists have generally acknowledged that Earth's geological history is a product of both sudden, cataclysmic events (such as meteorite impacts and volcanic eruptions) and gradual processes (such as weathering, erosion, and deposition).