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Describe the crust of the Earth in detail
? Related: Chapter Notes - Inside Our Earth
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Describe the crust of the Earth in detail Related: Chapter Notes - In...
- The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks.
- The crust is underlain by the mantle.
- The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust.
- The boundary between the crust and mantle is conventionally placed at the Mohorovicic discontinuity, a boundary defined by a contrast in seismic velocity.
- Earth's crust occupies less than 1% of Earth's volume.
- The oceanic crust of the Earth is different from its continental crust.
- The oceanic crust is 5 km (3 mi) to 10 km (6 mi) thick and is composed primarily of basalt, diabase, and gabbro.
- The continental crust is typically from 30 km (20 mi) to 50 km (30 mi) thick, and it is mostly composed of less dense rocks than is the oceanic crust.
- Some of these less dense rocks, such as granite, are common in the continental crust but rare to absent in the oceanic crust.
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Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth?
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Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth?.
Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Describe the crust of the Earth in detail Related: Chapter Notes - Inside Our Earth?.
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