Abstract
The previously developed geomorphic index of lunar surfaces is applied to the surface distribution of the lunar hot spots. It was found that the hot spot number density is the highest in areas of intermediate geomorphic index, corresponding to mature maria. Young and old maria and the terrae have fewer hot spots per unit area. An hypothesis is presented relating the probability of formation of a hot spot by impact with the evolutionary stage of the regolith of the target surface. The older is the surface, the deeper is the regolith and also the smaller is the average boulder size. For these reasons hot spots will be less probable. The paucity of hot spots in young maria could also be related with the evolution of the regolith, but fundamental changes in the petro-physics of the mare effusions cannot be ruled out.
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References
Gault, D. E.: 1970, ‘Saturation and Equilibrium Conditions for Impact Cratering on the Lunar Surface: Criteria and Implications’,Radio Sci. 5, 273–291.
Green, R. R.: 1969, ‘An Analysis of the Distribution of the Major Surface Characteristics and the Thermal Anomalies Observed on the Eclipsed Moon’, Boeing Scientific Research Laboratories, Document D1-82-0775, Boeing, Seattle, Washington.
Green, R. R.: 1970, ‘An Application of Trend-Surface Analysis in a Study of the Lunar Surface’,Modern Geol. 1, 123–135.
Ronca, L. B. and Green, R. R.: 1969, ‘Large-scale Evolution of the Lunar Surface’,Astrophys. Space Sci. 3, 564–578.
Ronca, L. B. and Green, R. R.: 1970, ‘Statistical Geomorphology of the Lunar Surface’,Bull. Geol. Soc. Am. 81, 337–352.
Saari, J. M. and Shorthill, R. W.: 1965, ‘Thermal Anomalies in the Totally Eclipsed Moon of December 19, 1964’,Nature 205, 964–965.
Shorthill, R. W. and Saari, J. M.: 1969, ‘Infra-Red Observation on the Eclipsed Moon’, Boeing Scientific Research Laboratories, Document D1-82-0778, Boeing, Seattle, Washington.
Winter, D. F.: 1967, ‘Note on the Thermal Heterogeneity of the Eclipsed Moon’,Icarus 7, 135–138.
Winter, D. F.: 1968, ‘Infrared Emission from the Surface of the Moon’, Boeing Scientific Research Laboratories, Document D1-82-0717, Boeing, Seattle, Washington.
Winter, D. F.: 1969, ‘The Infra-Red Moon: Data, Interpretations and Implications’, Boeing Scientific Research Laboratories, Document D1-82-0900.
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This paper constitutes contribution no. 04 of the Lunar Science Institute and was performed under NASA Contract No. NSR 09-051-001.
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Ronca, L.B. The relationship between lunar hot spots and the geomorphic index. The Moon 2, 202–210 (1970). https://doi.org/10.1007/BF00561962
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DOI: https://doi.org/10.1007/BF00561962