The rift is a massive 20-plus-million-year-old continental crack in the Earth's surface stretching ... that the African continent is slated to be split in two within the next 5 to 10 million ...
Volcanoes are cracks in Earth's crust that allow molten rock and hot gases to escape. According to the U.S. Geological Survey (USGS), there are about 1,350 volcanoes worldwide that have the ...