40Ar/39Ar dating of Apollo 12 impact spherules

We have used the 40Ar/39Ar isochron technique to determine ages of 81 lunar spherules from Apollo 12 soil sample 12023. Most spherules are created in meteoroid impacts, and their ages correspond to the timing of the impacts that formed them. Of the 81 impacts we have dated, most occurred in the last...

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Veröffentlicht in:	Geophysical research letters 2005-08, Vol.32 (15), p.L15201.1-n/a
Hauptverfasser:	Levine, Jonathan, Becker, Timothy A., Muller, Richard A., Renne, Paul R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Earth sciences Earth, ocean, space Exact sciences and technology
Online-Zugang:	Volltext
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