The dominant element in oceanic crust are
A)potassium and iron.
B)magnesium and aluminum.
C)silica and magnesium.
D)silica and aluminum.

Question

Quizplus · Accepted Answer

The dominant elements in oceanic crust are silica and magnesium. This is evident from the fact that oceanic crust is mainly composed of basalt, which is a mafic rock containing high amounts of magnesium and silica. Potassium and aluminum are more common in continental crust, while iron can be found in both oceanic and continental crust in varying amounts.

The Dominant Element in Oceanic Crust Are