Scientists Find Signs Africa May One Day Split Apart
Deep beneath sub-Saharan Africa, scientists believe a dramatic geological process may already be underway. A study published in the journal Frontiers in Earth Science found signs of a new tectonic plate boundary forming ? one that could eventually split part of the continent and create a new sea millions of years from now.
The suspected activity is centered on the Kafue Rift, part of a vast 2,500-kilometer rift system stretching from Namibia to Tanzania. Rifts are fractures in Earth’s crust that can trigger earthquakes, sinking land, and volcanic activity. Although geologists once believed the Kafue Rift beneath Zambia was inactive, new evidence suggests it may be slowly coming back to life.
The biggest clue comes from geothermal springs and wells near the rift, where scientists detected unusually high levels of helium-3. The gas is commonly associated with Earth’s mantle below the crust, which may indicate the crack has extended deep enough for mantle material to rise toward the surface as the Nubian (also called African) and Somali plates drift apart. If the process continues, Africa will be divided into two sub-continents, with the eastern coast forming the smaller of the two.
Earlier studies had already revealed subtle signs of activity, including tiny earthquakes detectable only by instruments, rising underground temperatures, and slight shifts in the land’s elevation. Together, the findings lend weight to the theory that the Kafue Rift could represent the beginning of continental splitting.
Still, scientists caution that the findings are still preliminary. The samples were taken from only a limited area, and further studies are needed to determine whether the mantle signal extends throughout the entire rift system.
Scientists say studying the Kafue Rift offers a rare chance to observe how a new plate boundary may form in real time. Beyond that, the discovery may also bring economic benefits, including geothermal energy development and access to valuable helium resources used in medicine and technology.
Yesel Kang Copy Editor teen/1780648928/1613367750
1. What scientific evidence suggests that the Kafue Rift is becoming active again?
2. Why is the presence of helium-3 important for understanding the continental split?
3. How long do scientists believe it will take to create a sea?
4. What are the potential economic benefits of discovering new geological rift systems?
1. Could the formation of a new sea change the global climate significantly?
2. Is it worth sacrificing land for the potential gain of geothermal energy?
3. How do geological processes remind us of the temporary nature of land?
4. Should we focus on geological discoveries that might happen millions of years later?
Deep beneath sub-Saharan Africa, scientists believe a dramatic geological process may already be underway. A study published in the journal Frontiers in Earth Science found signs of a new tectonic plate boundary forming ? one that could eventually split part of the continent and create a new sea millions of years from now.
Earlier studies had already revealed subtle signs of activity, including tiny earthquakes detectable only by instruments, rising underground temperatures, and slight shifts in the land’s elevation. Together, the findings lend weight to the theory that the Kafue Rift could represent the beginning of continental splitting.
