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Identifying impact events within the lunar cataclysm from 40 Ar- 39 Ar ages and compositions of Apollo 16 impact melt rocks

Norman, Marc; Duncan, Robert A.; Huard, John J.


Lunar impact melt breccias provide a unique record of the timing and frequency of collisional events during the early history of the inner Solar System prior to the development of a significant rock record on Earth. The predominance of ages clustering between 3.8 and 4.0 Ga was a major, unexpected discovery obtained from geochronological studies of lunar impact melts, and is the basis of the concept that a cataclysmic bombardment of large planetesimals struck the Earth and Moon, and possibly...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2006.05.021


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