Zarqa River by the King of Ammon. Eusebius places the river between Gerasa and Philadelphia. The headwaters of the Zarqa begin just northeast of Amman, rising from a spring named Ain Ghazal ("Gazelle spring"). The river flows to the north before heading west. Rising on the eastern side of the mountains of Gilead, it runs a course of about in a wild and deep ravine before flowing into the Jordan River between Gennesaret and the Dead Sea, at a point below its origin. At its higher reaches, the river banks are mostly steep and canyon-like. Near Ain Ghazal, two tributary wadis join
Dead Sea salt concentration of the Dead Sea fluctuates around 31.5%. This is unusually high and results in a nominal density of 1.24 kg/l. Anyone can easily float in the Dead Sea because of natural buoyancy. In this respect the Dead Sea is similar to the Great Salt Lake in Utah in the United States. An unusual feature of the Dead Sea is its discharge of asphalt. From deep seeps, the Dead Sea constantly spits up small pebbles and blocks of the black substance. Asphalt-coated figurines and bitumen-coated Neolithic skulls from archaeological sites have been found. Egyptian mummification processes used asphalt imported