A 4.3 Aeon Pre-Imbrium Event

Details A 4.3 Aeon Pre-Imbrium Event A 4.3 Aeon Pre-Imbrium Event

Jun 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972natur.237..446o&link_type=abstract

Nature, Volume 237, Issue 5356, pp. 446-447 (1972).

Physics

2

Scientific paper

HERE we point out that published Rb-Sr data for Apollo 14 whole rock samples define an isochron age of 4.31 +/- 0.04 aeon, which is interpreted as their time of igneous crystallization. Previously reported internal isochron ages of these rocks range from 3.87 to 3.96 aeon1, in excellent agreement with their 40Ar/39Ar ages2. We think that these approximate to the time of the Imbrium impact event and ejection of the material of the Fra Mauro Formation.

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