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Speyerer, Emerson J.; Povilaitis, Reinhold Z.; Robinson, Mark S.; Thomas, Peter C.; Wagner, Robert V. (13 October 2016). "Quantifying crater production and regolith overturn on the Moon with temporal imaging".
65:, stir and mix this soil. It had long been estimated that the top centimeter of the lunar surface is overturned every 10 million years. However, a 2016 analysis by the
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Hartmann, William K.; Anguita, Jorge; de la Casa, Miguel A.; et al. (2001). "Martian
Cratering 7: The role of Impact Gardening".
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57:, and as a result impact debris accumulates at the object's surface as a rough "soil," commonly referred to as
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Housen, Kevin R.; Wilkening, Laurel L.; Chapman, Clark R.; et al. (1979). "Asteroidal
Regoliths".
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