Tuesday, August 5, 2014

East Africa:

There's a Superplume Under Africa, Slowly Splitting the Continent Apart (The Weather Channel)

The Olduvai Gorge in the part of the Great Rift Valley that lies in Tanzania,
which millions of years from now will be replaced by an ocean. Wikimedia.
There's a place in Africa where the world is slowly tearing itself apart.

In the geological divide in East Africa known as the Great Rift Valley, there are two massive plateaus as big as entire countries: the Ethiopia Dome and the Kenya Dome, which lie within present-day Ethiopia and Somalia.

Scientists have known for years that the tectonic plates underneath this part of the continent are in the process of separating, slowly moving away from each other by a few millimeters a year.

But now they're much closer to figuring out why and how this process is working, thanks to a new study from scientists at the Scripps Institution of Oceanography and the University of California-San Diego.

“The rift valley is tearing East Africa apart,” said David Hilton, a geochemist at Scripps and one of the study's co-authors. “In another 50 million years, we’ll have another ocean there.”