Angrite /Sahara 99555
Microprobe Polished Thin Section
(no cover slip, thickness=30 microns)
Area of the Sahara 99555 = 10 x 10 mm
Slide = 30 x 45 mm
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The latest ultra precise measurement techniques have been used to obtain lead isotope ages for two examples of a rare type of meteorite, called basaltic angrites.
These differentiated meteorites are from parent bodies that were once molten and had solidified as a metal core and silicate mantle. Their absolute age is about 4.6 billion years, only a million years younger than the currently accepted minimum age of the Solar System...
Joel Baker, Martin Bizzarro, Nadine Wittig, James Connelly and Henning Haack
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