* Astronomy

Two meteorites found in Antarctica have compositions very similar to Earths andesite. The great age of these meteorites (4.5 billion years +) suggests that the andesite-like rocks were not formed through plate tectonics on a differentiated planet.

The two meteorites were discovered during the Antarctic Search for Meteorites (ANSMET) 2006/2007 field season in a region of the Antarctic ice known as the Graves Nunatak icefield. The light-coloured meteorites, designated GRA 06128 and GRA 06129, were immediately recognised as being different from previously known meteorites.

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