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
Kettle River (St. Croix River) but not intensity as the river approaches the St. Croix. This last section of the river is some of the best canoeing available in the state with manageable rapids, good fishing, frequent wildlife sightings (including bears) and absence of other people. The Kettle River hosts class III-IV white water rapids that are frequently paddled by kayakers, canoeist, and rafters. The Kettle flows into the St. Croix River east-northeast of Pine City. Near its headwaters the river collects the West Branch Kettle River, which flows southeastwardly from its source near Wright. Other tributaries include the Dead Moose and Split Rock rivers,