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Shergotty meteorite

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  Shergotty meteorite The  Shergotty meteorite  (Named after  Sherghati ) is the first example of the shergottite  Martian meteorite  family. It was a 5-kilogram (11 lb) meteorite which fell to Earth at  Sherghati , in the  Gaya district ,  Bihar, India  on 25 August 1865, and was retrieved by witnesses almost immediately.   Radiometric dating  indicates that it solidified from a volcanic  magma  about 4.1 billion years ago.  It is composed mostly of  pyroxene  and is thought to have undergone preterrestrial  aqueous  alteration for several centuries. Certain features within its interior are suggestive of being remnants of  biofilm  and their associated  microbial communities .
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