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The Greenwell Springs LL4 Chondrite: A New Fall from Louisiana, USA
Author(s) -
Byerly G. R.,
Jarosewich E.,
Mason B.,
Clarke R. S.
Publication year - 1988
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1988.tb00922.x
Subject(s) - meteorite , chondrite , geology , geochemistry , ordinary chondrite , olivine , crust , mineralogy , astrobiology , physics
— A 664 gm stone fell into suburban Baton Rouge in November 1987. The stone has a nearly complete fusion crust and was undamaged upon impact. The ordinary chondrite contains equilibrated olivine, Fa 28 , and largely equilibrated bronzite, Fs 23 . Some bronzite is still compositionally zoned and polysynthetically twinned, thus requiring petrologic classification of the meteorite as a type 4. A major element analysis of the meteorite falls exclusively into the field for the LL compositional group.