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Consider the following statement with reference to Earth's crust. 1. The continental crust is formed from Basaltic rocks. 2. The ocean floors are formed from Granitic rocks. 3. It is the outer thin layer with a thickness of up to 200 km. Which of the following statements given above is/are not correct?

Consider the following statement with reference to Earth's crust. 1. The continental crust is formed from Basaltic rocks. 2. The ocean floors are formed from Granitic rocks. 3. It is the outer thin layer with a thickness of up to 200 km. Which of the following statements given above is/are not correct? Correct Answer 1, 2 and 3

The correct answer is 1, 2 and 3.

Important Points

  • The crust is an outer thin layer with a total thickness normally between 30-50 km. Hence statement 3 is not correct.
  • The continents are composed of lighter silicate such as silica and alumina.
    • It is also called 'SIAL'.
    • They are made up of Granitic rocks. Hence statement 1 is not correct.
  • Oceans are having higher silicates such as silica and magnesium.
    • It is also called 'SIMA'.
    • They are made up of Basaltic rocks. Hence statement 2 is not correct.

Related Questions

Which of the following are true regarding the crust of the earth?
I. It is the outer thin layer with a total thickness of about 100 km
II. It forms around 0.5% of the earth's volume
III. The outer covering of the crust is of sedimentary material
IV. The lower layer of the crust consists of basaltic and ultra-basic rocks
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1. The acid lava usually melts at a relatively higher temperature as compared to basic (basaltic) lava.
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Which of the statements given above is/are correct?
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Consider the following statements: 1. The continental crust is composed of iron magnesium silicate igneous rocks, like basalt. 2. Gutenberg Discontinuity forms the boundary between the crust and the asthenosphere. Which of the statements given above is\are correct?
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Anuj, Bhola, Chandan, Dilip, Eswar, and Faisal live on different floors in a six-storeyed building (the ground floor is numbered 1, the floor above it 2, and so on). Anuj lives on an even-numbered floor. Bhola does not live on an odd-numbered floor. Chandan does not live on any of the floors below Faisal’s floor. Dilip does not live on floor number 2. Eswar does not live on a floor immediately above or immediately below Bhola. Faisal lives three floors above Dilip. Which of the following floor-person combinations is correct?