OBJECTIVE FORESTRY

FORESTRY

SOIL SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The continental crust, the rocky solid surface of the earth, is generally about ____ miles thick
A
50
B
75
C
100
D
125
Explanation: 

Detailed explanation-1: -Continental crust is typically 30-50 km thick, whilst oceanic crust is only 5-10 km thick. Oceanic crust is thinner and more dense than continental crust. The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust.

Detailed explanation-2: -Earth’s crust has an average thickness of about 15 to 20 kilometers or 9 to 12 miles. The crust at its thinnest is about 5 kilometers thick and made of oceanic crust. At its thickest it is about 50 kilometers and made of continental crust.

Detailed explanation-3: -The thickness of the crust varies in the range of range of 5-30 km in case of the oceanic crust and as 50-70 km in case of the continental crust. The continental crust can be thicker than 70 km in the areas of major mountain systems. It is as much as 70-100 km thick in the Himalayan region.

Detailed explanation-4: -There are two different types of crust – the oceanic crust and the continental crust. The oceanic crust is about 5-7 kilometers thick, while the continental crust measures 30-50 kilometers in thickness.

Detailed explanation-5: -Continental crust averages about 22 miles (35 kilometers) thick but may exceed 40 miles (70 kilometers) in mountainous regions. Unlike oceanic crust, continental crust is made up of many different types of rocks. On average, continental crust has a granite-like composition.

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