propylite

noun
prop·y·lite | \ ˈpräpəˌlīt \
plural -s

Definition of propylite 

: an altered form of andesite important for its connection with certain ore deposits and originally supposed to mark the beginning of Tertiary eruptive activity

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Other words from propylite

propylitic \¦⸗⸗¦litik \ adjective

History and Etymology for propylite

propylon + -ite

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