GENERAL GEOLOGY

Detailed explanation-1: -Continental Crust Continental crust is mostly composed of different types of granites. Geologists often refer to the rocks of the continental crust as “sial.” Sial stands for silicate and aluminum, the most abundant minerals in continental crust.

Detailed explanation-2: -There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt. Continental crust is less dense, thicker, and mainly composed of granite. The mantle lies below the crust and is up to 2900 km thick.

Detailed explanation-3: -Continental crust makes up the land on Earth, it is thicker (35-70 km), less dense and mostly made up of the rock granite. Oceanic crust makes up most of the ocean, it is thinner (5-7 km), denser and mostly made up of the rock basalt.

Detailed explanation-4: -Continental crust is thicker than oceanic crust, averaging 20-70 km thick, compared to 5-10 km for oceanic crust. Continental crust is less dense than oceanic crust (2.7 g/cm3 vs. 3 g/cm3), and it is much older.

Detailed explanation-5: -The crust is composed of two basic rock types granite and basalt. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt.