Mathematics – Logic
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ssrv...18..259s&link_type=abstract
Space Science Reviews, vol. 18, Dec. 1975, p. 259-279.
Mathematics
Logic
1
Apollo Flights, Astronomical Models, Lunar Evolution, Lunar Geology, Lunik Lunar Probes, Highlands, Lunar Core, Lunar Craters, Lunar Crust, Lunar Exploration, Lunar Maria, Lunar Surface, Structural Basins
Scientific paper
Based on the geological discoveries of the Apollo and Luna missions, the evolution of the moon is divided into seven major stages, beginning at some time near the end of the formation of the solar system. These stages are: (1) the beginning, 4.6 billion years ago (b.y.a.); (2) melting of the outer shell, 4.6 to 4.4 b.y.a.; (3) cratering of the highlands, 4.4 to 4.1 b.y.a.; (4) formation of the large basins, 4.1 to 3.9 b.y.a.; (5) formation of the light-colored plains, 3.9 to 3.8 b.y.a.; (6) formation of the basaltic maria, 3.8 to about 3.0 b.y.a.; and (7) the quiet-crust stage, about 3.0 b.y.a. to the present. Each Apollo and Luna mission is reviewed, emphasizing the most important discoveries and experiments performed. The limits on this interpretative understanding of the moon and the outlined sequence of events are pointed out.
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