Solid Earth www.solid-earth.net 1869-9510 1869-9529 1 1 2010 10.5194/se-1-1-2010 http://www.solid-earth.net/1/1/2010/ http://www.solid-earth.net/1/1/2010/se-1-1-2010.html http://www.solid-earth.net/1/1/2010/se-1-1-2010.pdf 1 3 2010-02-02 The Eons of Chaos and Hades C. Goldblatt colin.goldblatt@nasa.gov K. J. Zahnle N. H. Sleep E. G. Nisbet Space Science and Astrobiology Division, NASA Ames Research Center, MS 245-3, Moffett Field, CA 94035, USA School of Earth Sciences, Stanford University, Stanford, CA 94305, USA Department of Earth Sciences, Royal Holloway, University of London, Egham, TW20 0EX, UK We propose the <i>Chaotian Eon</i> to demarcate geologic time from the origin of the Solar System to the Moon-forming impact on Earth. This separates the solar system wide processes of planet formation from the subsequent divergent evolution of the inner planets. We further propose the division of the Hadean Eon into eras and periods and naming the proto-Earth <i>Tellus</i>. Canup, R M.: Dynamics of Lunar formation, Annu. Rev. Astron. Astrophys, 42, 441–475, \doi10.1146/annurev.astro.41.082201.113457, 2004. Chambers, J E.: Planetary accretion in the inner Solar System, \mboxEarth Planet. Sci. Lett., 223, 241–252, 2004. Cloud, P.: Major features of crustal evolution, Trans. Geol. Soc. S. Afr., Annexure to Vol 79, 1–33, 1976. Gomes, R., Levison, H F., Tsiganis, K., and Morbidilli, A.: Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets, Nature, 435, 466–469, 2005. Halliday, A N.: Terrestrial accretion rates and the origin of the Moon, \mboxEarth Planet. Sci. Lett., 176, 17–30, 2000. Nisbet, E G.: Definition of "Archean", Precambrian Res., 19, 111–118, 1982. Nisbet, E G.: Of clocks and rocks – The four aeons of Earth, Episodes, 14, 327–331, 1991. Nittler, L R.: Presolar stardust in meteorites: recent advances and scientific frontiers, \mboxEarth Planet. Sci. Lett., 209, 259–273, \doi10.1016/S0012-821X(02)01153-6, 2003. O'Neil, J., Carlson, R W., Francis, D., and Stevenson, R K.: Neodymium-142 evidence for Hadean mafic crust, Science, 321, 1828–1831, \doi10.1126/science.1161925, 2008. Sackmann, I.-J., Boothroyd, A I., and Kraemer, K E.: Our Sun. III. Present and Future, Astrophys. J., 418, 457–468, 1993. Stevenson, D J.: A planetary perspective on the deep Earth, Nature, 451, 261–265, \doi10.1038/nature06582, 2008. Zahnle, K., Arndt, N., Cockell, C., Halliday, A., Nisbet, E., Selsis, F., and Sleep, N H.: Emergence of a habitable planet, Space Sci. Rev., 129, 35–78, 2007.