CO (Ornans) Meteorites for Sale

CO (Ornans)

Meteorite class named after the Ornans meteorite that fell in France in 1868, are related in chemistry and composition to the CV chondrites and may, with them, represent a distinct clan of carbonaceous chondrites that formed in the same region of the early solar system. However, COs are usually blacker and have abundant smaller chondrules (60-70 vol. %; <1 mm in diameter) packed densely within a matrix representing over 70% of the meteorite. The matrix contains magnetite with <1.0 wt. % Cr2O3. CAIs are present but are commonly much smaller and less abundant (8-15 vol. %) than in the CV group. Also typical of COs are small inclusions of Ni-Fe metal that appear as tiny flakes on the polished surfaces of fresh, unweathered samples (1-6 vol. %).

Some or all content above used with permission from J. H. Wittke.

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