Boulder Tracks and Nature of Lunar Soil

Details Boulder Tracks and Nature of Lunar Soil Boulder Tracks and Nature of Lunar Soil

Jan 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973moon....6..164h&link_type=abstract

The Moon, Volume 6, Issue 1-2, pp. 164-175

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Scientific paper

Boulder tracks from 19 different locations on the Moon, observable in Lunar Orbiter photographs, have been examined. Measurements of the track width indicate that some of the boulders sank considerably deeper than others. It is suggested that lunar surface materials vary from place to place; the state of compaction (density of lunar soil) is probably one of the significant variables. Using bearing capacity theory, modified to be applicable to the rolling boulder problem by theoretical studies and extensive testing, the friction angle of the lunar soil was estimated. Most of the results were between 24 and 47 degrees with an arithmetic average of 37 degrees. These values suggest corresponding density variations of 1.25 to 2.00 g/cm3.

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