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Bensour - Witnessed Fall LL6 Chondrite from Morocco/Algeria 2002

Bensour - Witnessed Fall LL6 Chondrite from Morocco/Algeria 2002

$6.00

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Availability: 3 In Stock


In February of 2002, nomads in the remote Saharan desert near the Moroccan-Algerian border saw a shower of meteorites rain down.  These meteorites turned out to be a beautiful LL6 chondrite that is well-known for it's dark black crust and contrasting light-grey matrix with metal flecks.  

Refer to the photo.  The black centimeter cube is shown for scale and is not included.  Your specimen will be selected from the same lot shown.  You will get the biggest fragment remaining in the lot or several small fragments.  Your purchase will include a labelled gemjar for safe storage.

From the Meteoritical Bulletin entry on Bensour :


Bensour

Morocco/Algeria

Found, possible fall, 2002 February 11

Ordinary chondrite (LL6)

Eyewitness accounts from several nomads in the border region of Morocco and Algeria attest to a significant fall of many individual stones on February 11, 2002. However these reports are not detailed. Total weight is estimated to be in excess of 45 kg.  Individual stones (up to 9.2 kg) are very pale grey with a glistening black fusion crust.  Classification and mineralogy (A. Irving and S. Kuehner, UWS):  Very fine grained monomict breccia composed of olivine (Fa31.6, FeO/MnO = 60.0), orthopyroxene (Wo3.5Fs24.3, FeO/MnO = 36.6), clinopyroxene, and sodic plagioclase with subordinate Ni-rich Fe-Ni metal, troilite and chromite.  Sparse chondrules are present.  Oxygen isotopes (D. Rumble, CIW): analyses of two whole rock fragments by laser fluorination gave δ18O = +5.3 ± 0.1, δ17O = +4.0 ± 0.1, Δ17O = +1.20 ± 0.01‰.  Specimens: type specimen, 20 g, and one polished thin section, UWS; 1.5 kg, Hupé, main mass, 9.2 kg, Farmer.

 

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