• 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 most likely explanation is that Gibeon cooled more quickly than Owens Valley—indicating that it came from a smaller parent body. 

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  • Collection Information


      Found 1887

      Hamilton County, Texas, USA


      AMNH 116

  • For Educators

    • Topic: Earth Science

      Subtopic: Meteorites

      Keywords: Astrophysics, Iron-nickel alloys, Mineralogy, Astrogeology, Asteroids, Crystals, Meteorites, Iron

      Audience: General