![]() ![]() ![]() 67P Churyumov-Gerasimenko, a Jupiter family comet with a high D-H ratio. A device consists of eight balls each of mass 0.83kg attached to the ends of low-mass spokes of length 2.6m, so that the radius of rotation of the balls is. Altwegg K, Balsiger H, Bar-Nun A, et al (2015) Cometary science. Hosono N, Karato S, Makino J, Saitoh TR (2019) Terrestrial magma ocean origin of the Moon. Morbidelli A, Chambers J, Lunine JI, et al (2000) Source regions and timescales for the delivery of water to the Earth. Pearson DG, Brenker FE, Nestola F, et al (2014) Hydrous mantle transition zone indicated by ringwoodite included within diamond. Wiechert U, Halliday AN, Lee DC, et al (2001) Oxygen isotopes and the moon-forming giant impact. Johnson TE, Brown M, Gardiner NJ, et al (2017) Earth’s first stable continents did not form by subduction. Wilde SA, Valley JW, Peck WH, Graham CM (2001) Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago. Figure \(\PageIndex\): Water vapor leaves comet 67P/Churyumov–Gerasimenko.ġ8. For a breakdown of how these time intervals are chosen and organized, see chapter 7. This section summarizes the most notable events of each major time interval. Geoscientists use the geological time scale to assign relative age names to events and rocks, separating major events in Earth’s history based on significant changes as recorded in rocks and fossils. ![]()
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