Lunar chronology

Details Lunar chronology Lunar chronology

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974rf.....18..235k&link_type=abstract

Raumfahrtforschung, vol. 18, Sept.-Oct. 1974, p. 235-237.

Computer Science

Chronology, Lunar Evolution, Planetary Evolution, Selenology, Solar System, Lunar Craters, Lunar Crust, Lunar Rocks, Radioactive Age Determination

Scientific paper

A comprehensive timetable of lunar evolution is presented. Surface-layer exposure ages, crater counts, and Rb-Sr, U-Pb, and K-Ar dating methods are discussed. Conclusions drawn from lunar research include (1) all planetary objects probably formed within 100 million years from the solar nebula, beginning at 4.6 billion years ago; (2) accretion of terrestrial planets was rapid; (3) moon-sized objects underwent crustal differentiation during the first few hundred million years; and (4) the density of planetary debris has decreased exponentially with half life around 200 million years.

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