Brachina vs Winona
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Brachina
Brachina is a meteorite found in South Australia in 1974 and is the type specimen of the brachinites, a group of primitive achondrites. It is composed predominantly of olivine, accompanied by smaller amounts of pyroxene, plagioclase, chromite, metal, and sulfide. Its texture and chemistry record extensive thermal processing and partial melting on a differentiated asteroid while preserving some com...
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Winona
Winona is a meteorite found near Winona, Arizona, and is the type specimen of the winonaites, a group of primitive achondrites. Winonaites contain silicate minerals mixed with metal and sulfide and show evidence of heating, metamorphism, and partial melting on their parent asteroid. Their mineralogy and oxygen-isotope composition also connect them with silicate inclusions found in IAB iron meteori...
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