The name Eridanus or Eridanos, derived from the ancient Greek Eridanos was given by geologists to a river which flowed in what is now the bed of the Baltic Sea. The geological Eridanos was most important about one million years ago, when it had a length of about 2,700 kilometres. It began in Laponia, and then flowed through the area of the modern-day Gulf of Bothnia to western Europe, where it had an immense delta which spanned almost the entire current North Sea. It was comparable in size to the current-day Amazon River. The river Eridanos (or Eridanus) is an imagined river of Greek mythology whose name has been adopted by paleogeographers to describe the real ice age river that ran in the bed of the Baltic Sea, see Eridanus (geology). ... Geology (from Greek γη- (ge-, the earth) and λογος (logos, word, reason)) is the science and study of the Earth, its composition, structure, physical properties, history, and the processes that shape it. ... The Baltic Sea is located in Northern Europe, bounded by the Scandinavian Peninsula, the mainlands of Northern Europe, Eastern Europe, Central Europe, and the Danish islands. ... Laponia, or Lappland, was a historical Province or landskap in the extreme north of Sweden. ... Categories: Finland geography stubs | Sweden geography stubs | Seas | Baltic Sea ... Nile River delta, as seen from Earth orbit. ... Length 6,296 km Elevation of the source 5,597 m Average discharge 219,000 m³/s Area watershed 6,915,000 km² Origin  Nevado Mismi Mouth  Atlantic Ocean Basin countries Brazil (62. ...

The Eridanos began about 40 million years ago. About 12 million years ago the river reached the North Sea area, where it began to build an immense delta with its sediments. The Eridanos disappeared during the first Ice age of 700,000 years ago, which completely covered the riverbed. By the time the ice caps retreated the ancient river valley had been widened into the current-day Baltic Sea. Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years For the animated movie, see Ice Age (movie). ...

Remnants of the Eridanos are found all through northern Europe, from the Netherlands at its western end to sediments in northern Lapponia.