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Lunar ash flows - Isothermal approximation.Suggestion of the ash flow mechanism as one of the major processes required to account for some features of lunar soil. First the observational background and the gardening hypothesis are reviewed, and the shortcomings of the gardening hypothesis are shown. Then a general description of the lunar ash flow is given, and a simple mathematical model of the isothermal lunar ash flow is worked out with numerical examples to show the differences between the lunar and the terrestrial ash flow. The important parameters of the ash flow process are isolated and analyzed. It appears that the lunar surface layer in the maria is not a residual mantle rock (regolith) but a series of ash flows due, at least in part, to great meteorite impacts. The possibility of a volcanic contribution is not excluded. Some further analytic research on lunar ash flows is recommended.
Document ID
Document Type
Reprint (Version printed in journal)
Pai, S. I.
Hsieh, T.
(Maryland, University College Park, Md., United States)
O'Keefe, J. A.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 6, 2013
Publication Date
July 10, 1972
Publication Information
Publication: Journal of Geophysical Research
Volume: 77
Subject Category
Space Sciences
Accession Number
Funding Number(s)
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