Physics – Geophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977izssr........3s&link_type=abstract
Akademiia Nauk SSSR, Izvestiia, Fizika Zemli, Oct. 1977, p. 3-13. In Russian.
Physics
Geophysics
Earth Surface, Impact Loads, Meteoritic Damage, Planetary Temperature, Shock Heating, Geomorphology, Geophysics, Meteorite Craters, Planetary Evolution, Surface Layers, Surface Temperature, Thermal Conductivity
Scientific paper
Quasi-steady state equations of heat production are solved for the spherically symmetric displacement layer of the earth which is heated by the impact energy of accreting bodies and is cooled by the earth movement caused by the impact. The temperature at the base of the layer depends essentially on the diameters of the falling bodies and almost not at all on the speed of accumulation. While small bodies cause no effect, large bodies, by forming craters, cause a local reduction in the gravitational field. The layer heating can be evaluated by an inverse power law that takes into account the distribution of sizes of the falling bodies. The existence of large craters on planets of the earth type suggests that, during the final stages of the growth of the earth, falling bodies large enough to cause melting impacted the earth. The effects of such surface melting are considered.
Kozlovskaia S. V.
Safronov Viktor S.
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