TrekGEO > Mineral Trail > Tokai region > Shizuoka pref. > Laumontite

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Obora Path

Toi, Izu city, Shizuoka pref., Japan


Field of view: 20 mm. Laumontite crystals. The truncated opaque white prisms are laumontite. It turned opaque by dehydration. The grayish-brown host is hyaloclastite.

Recovered from an open space of a zeolite vein in tholeiitic andesitic-basaltic tuff breccia in an oceanic arc subjected to prophylitization alteration.

Laumontite from this location was described in 1982.

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