Question:
- Name the direct sources of information about the interior of the earth.
Answer:
The following are the direct sources of information about the interior of the earth;
- Deep Mining
- Deep Ocean Drilling project and Integrated Ocean Drilling Project
- Volcanic Eruptions
- Surface Rock study
Deep Mining:
- Gold mines in South Africa are around 3 to 4 km deep; going beyond this depth is not possible because it is very hot at this depth.
Deep Ocean Drilling project and Integrated Ocean Drilling Project:
For the exploration of the Earth's crust, two important projects are being run by scientists, the Deep Sea Penetration Project and the Integrated Ocean Exploration Project. Through many analyses, we have got a lot of information about the interior of the Earth. Under this project, the Kola is the deepest drill in the Arctic Ocean, reaching a depth of 12 km.
Volcanic Eruptions:
- Molten magma during volcanic eruption came from the asthenosphere, deep inside the earth. It indicates the asthenosphere is in a semi-liquid state.
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