Neumann lines, orNeumann bands, are fine patterns of parallel lines seen in cross-sections of manyhexahedriteiron meteorites in the kamacite phase, although they may appear also in octahedrites provided the kamacite phase is about 30 micrometres wide. They can be seen after a polished meteorite cross-section is treated with acid. The lines are indicative of a shock-induced deformation of thekamacite crystal, and are thought to be due to impact events on theparent body of themeteorite.[1]
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Neumann lines are named afterJohann Georg Neumann [de] who discovered them in 1848 in the hexahedrite meteorite which had fallen nearBraunau (present-day Broumov,Czech Republic) in 1847.[2][3]