alkaline rock: Quick Facts

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Also Known As	alkalic rock

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alkalic syenite

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limburgite phonolite nepheline syenite lamprophyre leucitite tephrite alkali basalt kimberlite ijolite basanite felsic and mafic rocks pegmatite spherulite micropegmatite colour index dike sill laccolith crystallite lopolith

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones