Science
Earth’s outer shell ballooned during massive growth spurt 3 billion years ago – Livescience.com
Ancient fragments of the Earth’s crust acted as ‘seeds’ for new crust to grow from.
Around 3 billion years ago, Earth
‘
s crust ballooned during a massive growth spurt, geoscientists have found.
At that time, just 1.5 billion years after Earth formed, the mantle the layer of silicate rock between the crust and the outer core that was more active in the past heated up, causing magma from that layer to ooze into fragments of older crust above it. Those fragments acted as “seeds” for the growth of modern-day continents
.
The researchers found evidence for this growth spurt hiding…
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