Time of Formation of the Earth's Core

  title={Time of Formation of the Earth's Core},
  author={V. M. OVERSBY and A. E. Ringwood},
ACCORDING to several theories1–3, the Earth was formed by accretion from a mixture of silicate particles and metal particles, something like those in chondritic meteorites. The accreting material may also have contained relatively small quantities of other components such as iron meteorites4 and carbonaceous chondrites5. Most advocates of these theories have maintained that accretion occurred relatively slowly (over a period of about 108 yr), so that the gravitational potential energy was… CONTINUE READING