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The particle track record of the Sea of Plenty

Authors
Journal
Earth and Planetary Science Letters
0012-821X
Publisher
Elsevier
Publication Date
Volume
13
Issue
2
Identifiers
DOI: 10.1016/0012-821x(72)90116-1

Abstract

Abstract We have measured the particle track densities in 36 grains taken from two levels of the soil column returned from the Sea of Plenty by Luna 16. One sample is from near the surface, the other is from about 30 cm depth. All but one of the grains contained very high track densities, > 10 8/cm 2. We conclude that all of the Luna 16 soil has been irradiated very close to the surface, that there has been little or no ‘recent’ admixture of previously shielded material from below 30 cm, and that the regolith is both unusually thin at the Luna 16 site and extremely old (∼ 3 by and more).

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