INSPIRE
Registry

phonolitoid

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Label:
phonolitoid
Definition:
Fine grained igneous rock than contains less than 90 percent mafic minerals, between 10 and 60 percent feldspathoid mineral in the QAPF fraction and has a plagioclase to total feldspar ratio less than 0.5. Includes rocks defined modally in QAPF fields 11 and 12, and TAS field Ph.
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Label Governance level Status
tephritic phonolite eu-technical Valid
phonolite eu-technical Valid