The main mineral constituents of the continental crust are:

Correct Answer: Silica and Alumina (Sial)

Subject: geography

• Silica and Magnesium (Sima)
• Silica and Alumina (Sial)
• Iron and Nickel (Nife)
• Oxygen and Carbon

Explanation: • The continental crust is primarily composed of Silica and Alumina, termed ‘Sial’. • The oceanic crust is mostly Silica and Magnesium (Sima). • The core (innermost layer) is made of Iron and Nickel (Nife). • Option A is for mantle/oceanic crust, Option C is for the core. • Trick: 'Continents are SIAL, Oceans are SIMA'. • The crust is about 30 km thick under continents and 5 km under oceans.

Loading Gyaanify...