Abstract:Pallasite meteorites contain evidence for vastly different cooling timescales: rapid cooling at high temperatures (K/years) and slow cooling at lower temperatures (K/Myrs). Pallasite olivine also shows a variety of textures ranging from well-rounded to angular and fragmental, and some samples record chemical zoning. Previous pallasite formation models have required fortuitous changes to the parent body in order to explain these contrasting timescales and textures, including late addition of a megaregolith laye… Show more
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