[meteorite-list] Half-baked asteroids have Earth-like crust

[bernd.pauli at paulinet.de]

"...these meteorites are ancient asteroid fragments consisting of feldspar-rich
rock called andesite. Similar rocks were previously known only from Earth,
making these samples the first of their kind from elsewhere in the Solar System.
..The light-colored meteorites, designated GRA 06128 and GRA 06129, were
immediately recognized as being different from previously known meteorites."


See also:

WYATT M.B. et al. (1999) Recognizing andesites on the SNC parent body:
Mineralogy from Mars Global Surveyor (MAPS 34-4, 1999, A123).

WYATT M.B. et al. (2001) An alternative hypothesis for basalt and andesite
on Mars: Global surface compositions from MGS-TES (MAPS 36-9, 2001, A226).

WYATT M.B. et al. (2002) Spectral evidence for weathered basalt as an alternative
to andesite in the northern lowlands of Mars (Nature, vol. 417, p. 263-266).


Best wishes,

Bernd