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The Importance of When. Two important age studies of Martian meteorites:. Baddeleyites in shergottite NWA 5298.
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The Importance of When Two important age studies of Martian meteorites: Baddeleyites in shergottite NWA 5298 Evolved, alkalicclasts in Black Beauty sample NWA 7533 indicate an early age for crust formation on Mars. Ages of baddeleyite crystals in NWA 5298 indicate that shergottites are young. Clasts in Black Beauty impact melt breccia
Shergottite Age Conundrum (From Borg et al., 2003, GCA, v. 67(18), p. 3519-3536.) Pb isotopic data indicate old ages for Martian meteorites, including shergottites. But internal isochrons suggest young ages for shergottites.