Rocks

Question 1

approximately equal amounts of K-feldspars and Na-plagioclase

Answer 1

Monzonite

Question 2

primarily composed of the mineral orthopyroxene, along with plagioclase feldspar

Answer 2

Norite

Question 3

composed predominantly of calcium-rich plagioclase feldspar

Answer 3

Anorthosite

Question 4

quartz (20 – 60% of the felsic minerals) and abundant plagioclase

Answer 4

Tonalite

Question 5

a coarse-grained, igneous rock that’s
made up of olivine and plagioclase feldspar. It’s a
member of the gabbroic rock family, but it lacks
pyroxene or has very little

Answer 5

Troctolite