Mediterranean Sea million years ago (mya) in less than two years by the Zanclean flood. Water poured in from the Atlantic Ocean through a newly breached gateway now called the Strait of Gibraltar at an estimated rate of about three orders of magnitude (one thousand times) larger than the current flow of the Amazon River. The Mediterranean Sea has an average depth of and the deepest recorded point is in the Calypso Deep in the Ionian Sea. The coastline extends for . A shallow submarine ridge (the Strait of Sicily) between the island of Sicily and the coast of Tunisia divides the
Greek sea gods therefore stand as a powerful symbol of the unknown and otherworldly. Although many people thought about the sea and her depths, no one would enter the watery grave. Thus Cape Tanaerum, the point at which mainland Greece juts most sharply into the Mediterranean, was at once an important sailor's landmark, a shrine of Poseidon, and the point at which Orpheus and Heracles were said to have entered Hades. This motif is apparent in the paradoxical festivals of the shadowy sea-deity Leucothea ("white goddess"), celebrated in many cities throughout the Greek world. Identifying her with the drowned heroine Ino, worshippers would