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Hadean Protocrust
May 14 , 2025
15 hrs 0 min
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- New research suggests that Earth’s first crust formed over 4.5 billion years ago.
- The Hadean protocrust is the name for the earth’s crust — its outermost layer — when it first formed.
- The ‘Hadean’ prefix refers to the planet’s first geologic aeon.
- At this time, within 200 million years of its genesis, the earth’s surface was partially molten and almost constantly bombarded by rocks from space.
- As many volcanoes also raged, the surface was very hot and hellish.
- As parts of the magma ocean cooled, the first pieces of the crust began to take shape.
- However, it remained somewhat unstable, with certain sections breaking away while new areas solidified.
- The thicker parts of the crust slowly formed the first continents, which moved like plates on the asthenospheric mantle.
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