TrekGEO > Mineral Trail > Kinki region > Osaka pref. > Orthoclase

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Nose city, Toyono county, Osaka pref., Japan


Length of the upper crystal: 15 mm. Dispatched orthoclase crystals. The specimens have a dull luster as they were replaced by clay minerals.

Recovered from a dike of quartz porphyry intruded in tuff breccia of a caldera complex at the last stage of caldera formation. Formed in the Late Cretaceous (70 Ma).

Orthoclase from this location was described in 1951.

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