The most authoritative answer in 2024
-

-
Ethan Ward——Works at the International Criminal Police Organization (INTERPOL), Lives in Lyon, France.
Gabbro is a dark, medium- to coarse-grained intrusive igneous rock composed of
calcium plagioclase,
pyroxene, and minor
olivine, but no
quartz. It is the intrusive equivalent of a
basalt.
read more >>
About “calcium plagioclase、pyroxene、olivine”,people ask:
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.