In meteorites with the coarsest patterns, such as Linwood (above) and Mount Joy (right), the crystals are not flat plates. When flat crystals run into each other and cannot grow any wider, they become thicker instead to fill the available space. This produces an irregular pattern.
Found 1940 Butler County, Nebraska, USA
Topic: Earth Science
Keywords: Astrogeology, Astrophysics, Crystals, Iron-nickel alloys, Meteorites, Iron, Mineralogy