Prolonged Early Bombardment of the Inner Solar System from Ages of Lunar Samples
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Norman, M. and Nemchin, A. 2012. Prolonged Early Bombardment of the Inner Solar System from Ages of Lunar Samples, in Proceedings of the 75th Annual Meeting of the Meteoritical-Society, Aug 12-17 2012, id 5401. Cairns, Australia: Lunar and Planetary Institute.
METEORITICS & PLANETARY SCIENCE
75th Annual Meeting of the Meteoritical-Society
Department of Applied Geology
It appears that the Moon, and therefore also Mars and Earth, experienced an extended phase of post-accretionary heavy bombardment spanning ≥500 Ma rather than a single short, sharp spike of basin-forming impacts at 3.9 Ga.