Dead Sea hypothesis is that the Dead Sea lies in a true rift zone, an extension of the Red Sea Rift, or even of the Great Rift Valley of eastern Africa. A more recent hypothesis is that the Dead Sea basin is a consequence of a "step-over" discontinuity along the Dead Sea Transform, creating an extension of the crust with consequent subsidence. Around 3.7 million years ago, what is now the valley of the Jordan River, Dead Sea, and the northern Wadi Arabah was repeatedly inundated by waters from the Mediterranean Sea. The waters formed in a narrow, crooked bay that is
Alapaha River the Alapahoochee River and the short Little Alapaha River, which rises in Echols County, Georgia, and flows southwestward. The Alapaha River is an intermittent river for part of its course. During periods of low volume, the river disappears underground and becomes a subterranean river. At approximately downstream from Jennings, Florida the Dead River enters the Alapaha River. It is a usually dry river bed with a number of sinkholes, including the Dead River Sink. During periods of low water flow, the Alapaha River downstream from the confluence of the Dead River and the Alapaha River flows upstream into the Dead