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Constraints on the recent rate of lunar ejecta breakdown and implications for crater ages

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dc.contributor.author Ghent, Rebecca R. en
dc.contributor.author Hayne, Paul O. en
dc.contributor.author Bandfield, Joshua L. en
dc.contributor.author Campbell, Bruce A. en
dc.contributor.author Allen, Carlton C. en
dc.contributor.author Carter, Lynn M. en
dc.contributor.author Paige, David A. en
dc.date.accessioned 2015-04-17T17:39:01Z
dc.date.available 2015-04-17T17:39:01Z
dc.date.issued 2014
dc.identifier.citation Ghent, Rebecca R., Hayne, Paul O., Bandfield, Joshua L., Campbell, Bruce A., Allen, Carlton C., Carter, Lynn M., and Paige, David A. 2014. "<a href="https://repository.si.edu/handle/10088/25011">Constraints on the recent rate of lunar ejecta breakdown and implications for crater ages</a>." <em>Geology</em>. 42 (12):1059&ndash;1062. <a href="https://doi.org/10.1130/G35926.1">https://doi.org/10.1130/G35926.1</a> en
dc.identifier.issn 0091-7613
dc.identifier.uri http://hdl.handle.net/10088/25011
dc.description.abstract We present a new empirical constraint on the rate of breakdown of large ejecta blocks on the Moon based on observations from the Lunar Reconnaissance Orbiter (LRO) Diviner thermal radiometer. We find that the rockiness of fresh crater ejecta can be quantified using the Diviner-derived rock abundance data set, and we present a strong inverse correlation between the 95th percentile value of the ejecta rock abundance (RA95/5) and crater age. For nine craters with published model ages derived from crater counts on their continuous ejecta, RA95/5 decreases with crater age, as (age m.y.])-0.46. This result implies shorter rock survival times than predicted based on downward extrapolation of 100 m crater size-frequency distributions, and represents a new empirical constraint on the rate of comminution of large rocks not previously analyzed experimentally or through direct observation. In addition, our result provides a new method for dating young lunar craters. en
dc.relation.ispartof Geology en
dc.title Constraints on the recent rate of lunar ejecta breakdown and implications for crater ages en
dc.type Journal Article en
dc.identifier.srbnumber 131025
dc.identifier.doi 10.1130/G35926.1
rft.jtitle Geology
rft.volume 42
rft.issue 12
rft.spage 1059
rft.epage 1062
dc.description.SIUnit NASM en
dc.description.SIUnit NASM-CEPS en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 1059
dc.citation.epage 1062


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