Kumomi
Kumomi, Matsuzaki city, Kamo county, Shizuoka pref., Japan
Occurrence
Alkaline metasomatic rocks of Heulandite-Analcime zone
Minerals in vesicules of the late Pliocene (3.0 Ma) Subara Andesite. The Subara Andesite unconformably overlies the Miocene to Pliocene Shirahama Group. The age of andesite was determined by K-Ar radiometric dating.
Outcrop of the Subara Andesite. The grayish-green blocks are andesite. The white spots are phenocrysts of anorthite. The clear prisms in the vesicule above the coin are quartz.
Reported Minerals
- Epistilbite
- Chabazite
- Stilbite
- Calcite
- Quartz
Mineral Assemblages
- Calcite - Chabazite - Epistilbite - Stilbite
- Chabazite - Quartz
Localities
Related Occurrences
- Halloysite zone (Alunite zone, Argillized zone)
- Kaolinite zone (Alunite zone, Argillized zone)
- Minamiite-Alunite zone (Alunite zone)
- Pyrophyllite zone
- Smectite zone (Argillized zone)
- Interstratified mineral zone (Argillized zone)
- Illite-Chlorite zone (Propylite zone)
- Epidote-Actinolite zone
- Stilbite-Mordenite zone (Zeolite zone)
- Heulandite-Analcime zone (Zeolite zone)
- Laumontite-Albite zone (Zeolite z., Propylite z.)
- Wairakite-Albite zone (Zeolite zone)