Study Finds Accelerated Crustal Thinning in East Africa's Turkana Rift

Scientists observe accelerated crustal thinning in East Africa's Turkana Rift, a process linked to tectonic extension, according to research on East Africa's Turkana Rift. Researchers determined the Earth's crust beneath the rift is thinning at a more advanced rate than previously recognized.

The geological zone spans approximately 300 miles across Kenya and Ethiopia and has entered a phase known as necking.

' The necking phenomenon involves the crust stretching and narrowing in its center. At the rift's center, the crust measures 8 miles deep, while areas further from the central zone exceed 20 miles in thickness. ' The Turkana Rift first began opening roughly 45 million years ago.

The necking phase commenced following extensive volcanic eruptions approximately 4 million years ago. 7 millimetres annually. The research team identified evidence of a previous rifting episode that failed to fully divide the continent, but that earlier event weakened and thinned the crust.

The Turkana Rift has yielded over 1,200 hominin fossils spanning the past 4 million years, representing roughly one third of all such specimens found across Africa. Researchers propose the onset of necking caused the land within the rift to subside, creating conditions where fine-grained sediments accumulated rapidly.

' GB News reported these findings, highlighting how the geological transformations could lead to ocean formation millions of years in the future, with magma pushing through to create new seafloor and waters from the Indian Ocean potentially flowing into a new basin.