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Nakadomari

Nakadomari city, Kita-Tsugaru county, Aomori pref., Japan

Occurrence

High-temperature zeolite facies metamorphic rocks

Zeolites in vesicules of basalt lava associated with middle Miocene (15.5 - 15.0 Ma) Nagane Formation. The lava erupted in seawater as the margin of each basalt lava is hyaloclastite and pillow lava.

Nakadomari

Outcrop of basalt lava associated with Nagane Formation. The dark green host is a part of basaltic pillow lava, and small holes are visicules. The bluish-white parts are apophyllite. Zeolites are in both visicules and cracks.

Reported Minerals

Mineral Assemblages

  • Analcime
  • Apophyllite - Phillipsite-Ca - Okenite
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