Ages of Crystalline Rocks from Fra Mauro

Details Ages of Crystalline Rocks from Fra Mauro Ages of Crystalline Rocks from Fra Mauro

Sep 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971sci...173.1235h&link_type=abstract

Science, Volume 173, Issue 4003, pp. 1235-1236

Physics

3

Scientific paper

Crystallization ages for six rocks from Fra Mauro have been measured by the argon-40-argon-39 method. All six rocks give an age of 3.77 ± 0.15 × 109 years, which is the same as for fragmental rocks from this site. It is concluded that the Imbrium event and the crystallization of a significant portion of the pre-Imbrian basalts were essentially contemporaneous.

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