the importance of when
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http://www.psrd.hawaii.edu/June14/Mars-meteorite-ages.html
The Importance of WhenThe Importance of When
Two important age studies of Martian meteorites:
Clasts in Black Beauty impact melt breccia
Baddeleyites in shergottite NWA 5298
Evolved, alkalic clasts 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.
Evolved, alkalic clasts 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.
http://www.psrd.hawaii.edu/June14/Mars-meteorite-ages.html
Ancient Clasts in Black BeautyAncient Clasts in Black Beauty
http://www.psrd.hawaii.edu/June14/Mars-meteorite-ages.html
Shergottite Age ConundrumShergottite Age Conundrum
Pb isotopic data indicate old ages for Martian meteorites, including shergottites.
But internal isochrons suggest young ages for shergottites.
(From Borg et al., 2003, GCA, v. 67(18), p. 3519-3536.)
http://www.psrd.hawaii.edu/June14/Mars-meteorite-ages.html
Baddeleyite Data Suggest Shergottites Are YoungBaddeleyite Data Suggest Shergottites Are Young
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