Mppsc current affairs

🔆 About Hadean Protocrust

📍 What is it?
✅ The Hadean protocrust refers to Earth’s earliest outer crust layer, formed during the Hadean aeon (~4.0–4.6 billion years ago).
✅ The term “Hadean” is derived from Hades, Greek god of the underworld — indicating a hellish early Earth.

📍 Geological Conditions in Hadean Aeon
✅ Earth’s surface was partially molten, hit by intense meteor showers and volcanic eruptions.
✅ As the magma ocean cooled, pieces of crust began to form.
✅ These early crusts became proto-continents, floating over the asthenospheric mantle (~400 km deep).

📍 Plate Activity Begins
✅ Continental plates began sliding, colliding, and subducting — processes that left chemical signatures in the crust.
✅ These signatures are crucial in tracing the origins of plate tectonics.

📍 🧪 New Study: A Paradigm Shift
✅ A recent study shows chemical signs of tectonics existed even before active subduction began.
✅ Implies that the continental crust began forming much earlier than previously believed — already present in Hadean protocrust.

#PlateTectonics #geography

www.tgoop.com/mppsc_current/14156

1.01K viewsAug 27 at 14:57

🔆 About Hadean Protocrust

📍 What is it?
✅ The Hadean protocrust refers to Earth’s earliest outer crust layer, formed during the Hadean aeon (~4.0–4.6 billion years ago).
✅ The term “Hadean” is derived from Hades, Greek god of the underworld — indicating a hellish early Earth.

📍 Geological Conditions in Hadean Aeon
✅ Earth’s surface was partially molten, hit by intense meteor showers and volcanic eruptions.
✅ As the magma ocean cooled, pieces of crust began to form.
✅ These early crusts became proto-continents, floating over the asthenospheric mantle (~400 km deep).

📍 Plate Activity Begins
✅ Continental plates began sliding, colliding, and subducting — processes that left chemical signatures in the crust.
✅ These signatures are crucial in tracing the origins of plate tectonics.

📍 🧪 New Study: A Paradigm Shift
✅ A recent study shows chemical signs of tectonics existed even before active subduction began.
✅ Implies that the continental crust began forming much earlier than previously believed — already present in Hadean protocrust.

#PlateTectonics #geography

BY Mppsc current affairs