Question
Download Solution PDFWhat is the average thickness of the continental crust of earth?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 30 km.
Key Points
- Earth’s crust:
- The interior of the earth is made up of several concentric layers which are the crust, the mantle, the outer core and the inner core.
- The crust is the outermost layer of the earth making up 0.5-1.0% of the earth’s volume and less than 1% of Earth’s mass.
- Materials that initially stayed in their liquid phase during this process, called “incompatible elements,” ultimately became Earth's brittle crust.
- The lower layer of the crust consists of basaltic and ultra-basic rocks.
- Density increases with depth, and the average density is about 2.7 g/cm3 (the average density of the earth is 5.51 g/cm³).
- The thickness of the crust varies in the range of 5-30 km in the case of the oceanic crust and 50-70 km in the case of the continental crust.
- The mean thickness of the oceanic crust is approximately 7 km, while the mean thickness of the continental crust is about 35-40 km.
Important Points
Layer | Characteristics |
---|---|
Crust |
|
Mantle |
|
Core |
|
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