SCI-TECH: GEOGRAPHY | AFRICA- New ocean could form in Africa as continent continues to split apart
“This is the only place on Earth where you can study how a continental rift becomes an oceanic rift,” Christopher Moore, a doctoral student at the University of Leeds, told The Economic Times.
“We can see that oceanic crust is starting to form because it’s distinctly different from continental crust in its composition and density,” Moore said.
The split formed in the desert of Ethiopia, creating the possibility that countries such as Kenya and Uganda could develop a coastline as a new ocean forms in the crevice.
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The 35-mile-long split, known as the East African Rift, formed in 2005, but any development into a new ocean will take around five to 10 million years, researchers said.
“The Gulf of Aden and the Red Sea will flood in over the Afar region and into the East African Rift Valley and become a new ocean, and that part of East Africa will become its own separate small continent,” Ken Macdonald, a marine geophysicist and a professor emeritus at the University of California, told Mashable.
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“As we get more and more measurements for GPS, we can get a much greater sense of what’s going on.”
The cause of the split remains unknown, but some believe the formation of the rift was driven by tectonic processes similar to those occurring at the bottom of the ocean, according to the Times.
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The rift sits at the border of three tectonic plates that have been drifting apart for some time. The plates – identified as the Somalian tectonic plate, the Nubian tectonic plate and the Arabian tectonic plate – drift farther apart by a few millimeters per year, The Jerusalem Post reported.
Cynthia Ebinger, a geophysicist at Tulane University in New Orleans, noted that the split has developed in an area with some of the highest temperatures on the planet.
“The hottest inhabited town on the Earth’s surface is in the Afar,” Ebinger told NBC News. “Daytime temperatures often go to 130 degrees Fahrenheit and they cool off to a balmy 95 degrees at night.”
She described how the split initially formed, taking just a few days to do what normally takes “several hundred years” of tectonic plate movement.
“We’re trying to understand the straw that breaks the camel’s back,” she said, speculating that the build-up of pressure from rising magma could trigger the explosive events so far seen in the region.
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