TrekGEO > Mineral Trail > Kanto region > Tokyo metropolis > Glendonite

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Tateya, Akiruno city, Tokyo metropolis, Japan


Length of upper right crystal: 20 mm. Dispatched specimens of glendonite. The upper-right specimen is short prismatic, whereas the upper-left one has clear pyramidal planes. There are also specimens which looks like a twin.

Recovered from marine mudsone. Formed in Miocene (19 Ma).

Glendonite from this location was described in 1977.

Other localities

  • Kodo (Miocene mudstone)
  • Tateya (Miocene mudstone)
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