Antarctica’s Unique Meteorites

Posted on March 14, 2008  Comments (1)

Antarctica’s unique space rocks

Dr Shearer agreed the 4.5-billion-year ages of the meteorites indicated the likely source was an asteroid. “The history of this rock involves partial melting on a fairly primitive body,” he explained. Even if the rocks had been blown off Venus in an impact 4.5 billion years ago, they could not have drifted in space for such a vast length of time before landing in Antarctica recently, scientists said.

The identity of the object that spawned the two meteorites may be elusive, but researchers have been able to draw up a basic profile. They know, for instance, that the parent body had “differentiated” – that is, had been reprocessed into a layered object, usually with a core, a mantle and a crust. Stony meteorites which have undergone this reprocessing are known as achondrites.

Related: Meteorite, Older than the Sun, Found in CanadaNASA Tests Robots at Meteor CraterMalachite

One Response to “Antarctica’s Unique Meteorites”

  1. sofyan
    March 16th, 2008 @ 7:52 am

    hi, nice blog and post

    i come from Indonesia, thanks a lot for your information

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