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Owens Valley

Part of Hall of Meteorites.

C.5.2.3. + Owens Valley (AMNH 2636). Medium and fine crystals hero.jpg

Exhibition Text

Medium and fine crystals

These medium- and fine-grained meteorites have much thinner crystals than the coarse-grained samples above. Finer patterns generally indicate higher nickel content, because nickel limits the growth of the kamacite crystals that produce the Widmanstätten pattern.

Finer crystals are also produced by faster cooling. Gibeon (below, left), for example, has smaller crystals than Owens Valley (below), even though it has slightly less nickel. The mos