Note4Students
From UPSC perspective, the following things are important :
Prelims level: Hadean Protocrust
Why in the News?
A study from Macquarie University, Australia, suggests that plate tectonics may have started earlier than previously thought, with signs of it possibly existing in the Hadean protocrust even before the plates began to move.
What is Hadean Protocrust?
- The Hadean protocrust is the Earth’s first crust, formed within the first 200 million years of the planet’s creation.
- During this time, the surface was mostly molten and constantly hit by space rocks, making it very hot and unstable.
- Over time, parts of the molten surface began to cool and solidify, creating the first crust.
Back2Basics: Hadean Aeon
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Key Findings of the Recent Study:
- The researchers found that the chemical signatures linked to plate tectonics might have appeared earlier, even when the Earth’s crust was still forming in the Hadean protocrust.
- This discovery suggests that early movements of the Earth’s crust, similar to plate tectonics, could have happened before plates began to move as we know them today.
- The study used models and experiments to support these ideas, but further research is needed to confirm these findings.
| [UPSC 2013] Which of the following are responsible for bringing dynamic changes on the surface of the earth?
1. Electromagnetic radiation 2. Geothermal energy 3. Gravitational force 4. Plate movements 5. Rotation of the earth 6. Revolution of the earth Which of the above are responsible for bringing dynamic changes on the surface of the earth? (a) 1 only (b) 2 and 3 only (c) 2, 4 and 6 only (d) 2 and 4 only |
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