Lunar floor-fractured craters - Evidence for viscous relaxation of crater topography

Details Lunar floor-fractured craters - Evidence for viscous relaxation of crater topography Lunar floor-fractured craters - Evidence for viscous relaxation of crater topography

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.9537h&link_type=abstract

Journal of Geophysical Research, vol. 86, Oct. 10, 1981, p. 9537-9552.

Astronomy and Astrophysics

Astronomy

22

Lunar Craters, Lunar Evolution, Lunar Topography, Relaxation (Mechanics), Viscosity, Astronomical Models, Displacement, Lunar Photographs, Gassendi, Humorum, Mare, Lalande, Dumas Crater, Runge Crater, Thickness, Haldane Crater, Dawes, Timocharis, Davy, Ritter, Lambert, Sabine, Data, Craters, Crater Floors, Fractures, Viscosity, Relaxation, Temperatures, Topography, Hypotheses, Models, Comparisons, Diameter, Characteristics, Lithosphere, Cooling, Thermal Properties, Structures, Moon, Photographs, Procedure,

Scientific paper

Viscous relaxation is evaluated quantitatively as a possible mechanism to account for the observed topographical modification of floor-fractured lunar craters. On the basis of a model of the moon as a viscous material of uniform Newtonian viscosity, the ultimate topographic profiles of fresh craters predicted taking into account viscous relaxation effects are compared with the observed profiles of floor-fractured craters of similar diameter. It is found that for a number of crater pairs, the agreement of the observations with the predictions of the simple viscous relaxation model is good, suggesting that isostatic adjustment of craters in areas of anomalously high temperatures at shallow depth may be a more important source of deformation than previously realized.

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