For years, scientists have puzzled over two unexplained massive boulders beneath the earth’s surface.
Many theories have been thrown around since their discovery in the 1980s, including claims that they might be huge Fragments of a strange world.
The rocks under the earth’s crust are each the size of a continent and 100 times higher than Mount Everest.
One sits under Africa while the other is found under the Pacific Ocean.
Looking for answers, two experts have made some interesting new discoveries about the two gigantic masses.
As suspected, the blob under Africa turns out to be much higher.
In fact, it’s twice the height of that on the other side of the world, measuring about 620 miles higher.
And that’s not all.
Crucially, scientists have found that the African rock is also less dense and less stable.
It’s not clear why things are this way, but it could be one reason the continent has had significantly more supervolcano eruptions over hundreds of millions of years than its counterpart on the other side.
“This instability can have many implications for surface tectonics, and also earthquake and supervolcano eruptions,” said Qian Yuan of Arizona State University.
These thermochemical materials — officially known as Large Low Shear-Velocity Provinces (LLSVPs) — have been studied by looking at seismic wave data and running hundreds of simulations.
Although we now know that both have different compositions, we have yet to figure out how this affects the surrounding mantle, which sits between the planet’s core and the crust.
And most importantly, we’re no closer to finding out where these mysterious blobs came from.
“Our combination of analysis of seismic results and geodynamic modeling provides new insights into the nature of Earth’s largest deep interior structures and their interaction with the surrounding mantle,” Yuan added.
“This work has far-reaching implications for scientists trying to understand the present-day status and evolution of deep mantle structure and the nature of mantle convection.”
And so the investigation continues.
The research was published in nature geosciences Diary.
This article originally appeared on The sun and is reproduced here with permission.
https://nypost.com/2022/03/14/mysterious-and-unstable-blobs-the-size-of-continents-beneath-earths-surface-baffle-scientists/ Mysterious and unstable “blobs” the size of continents beneath the Earth’s surface have puzzled scientists