micropegmatite: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Topics

igneous rock colour index myrmekite felsic and mafic rocks pegmatite spherulite alkaline rock dike sill laccolith crystallite

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