Turkana rift crust thins to 13 kilometers as Africa prepares to split

The African continent is undergoing a structural failure. Deep beneath Kenya and Ethiopia, the Earth's crust has thinned to a critical threshold, creating a narrow geological bridge that is nearing a total breach. Researchers focusing on the Turkana rift have identified a section where the lithosphere has shrunk to 13 kilometers-roughly one-third of the standard thickness for continental crust. This phenomenon, termed a "neck," signals the transition to a final rupture. In geological terms, this is the precursor to the birth of a new ocean basin in a region currently defined by highlands and savannas. Analysis published in Nature Communications utilizes acoustic wave data to map the Turkana rift, a 500-kilometer lowland stretch. The measurements reveal a stark contrast: while the crystalline crust at the center has dropped to 12.7 kilometers, the flanking regions maintain a thickness exceeding 35 kilometers. This stretching process mirrors the behavior of ductile material; as the center thins, it becomes increasingly susceptible to tectonic tension.