The CM meteorite, Nogoya, emerged from Bunch & Chang's work as an untypical and unique meteorite whose minerals had suffered more extensive aqueous alteration than those for example in Murchison or Murray. Phyllosilicate average analysis showed more MgO and less 'FeO' in both the Mg-serpentine and Fe-serpentine, which largely constitute Nogoya, than in other CM analysis. Read more (PDF)
The Nogoya meteorite fell on June 30, 1879 over Entre Rios, Argentina. A little over a month after the Estherville meteorite in northern America. After the appearance of a meteor, a single stone of only 4 kg. was recovered which has been classified as a rare carbonaceous CM2 meteorite. Olivine compositions ranging from Fo65 to Fo 99 are found in meteorite (M. Velbel, 2001) and amino acids, in high amounts, at about 40 n moles/g (J. Cronin and C. Moore, 1976). Read more