Some of these have suffered contamination from the oxidising effect of Earth's atmosphere and the infiltration of the biosphere, but those meteorites collected in the last few decades from Antarctica are almost entirely pristine.
Neki su pretrpjeli kontaminaciju zbog oksidirajućeg efekta Zemljine atmosfere i infiltraciju biosfere, no meteoriti prikupljeni u proteklih nekoliko desetljeća s Antarktike gotovo su u potpunosti izvorni.