Mathematics – Logic
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9...33b&link_type=abstract
Geophysical Research Letters, vol. 9, Jan. 1982, p. 33-36. Research supported by the Deutsche Forschungsgemeinschaft.
Mathematics
Logic
2
Earth Orbits, Lunar Evolution, Lunar Figure, Orbit Calculation, Selenology, Chronology, Continents, Earth-Moon System, Temporal Distribution, Moon, Orbits, Evolution, Motion, Analysis, Chronology, Distance, Earth-Moon System, Data, Observations, Q Value, Tidal Effects, Theoretical Studies
Scientific paper
A first order analysis of current selenodetic and selenochronological data indicates that the present lunar figure was formed 3.0 + or - 0.5 billion years ago at an earth-moon distance of 20.4 + or - 2.3 earth radii. This datum and data from a variety of sources are used to define the time evolution of the earth-moon distance. It is shown that there was a sudden increase in this distance about 2 billion years ago when the Q of the earth must have decreased by a factor of 5. This change in Q correlates well with the onset of rapid continental growth and hence the expansion of shallow sea and continental shelf waters as shown in the geological record for that time.
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