North Sea between and among rivers, artificial harbours, and the sea. The Kiel Canal, connecting the North Sea with the Baltic Sea, is the most heavily used artificial seaway in the world reporting an average of 89 ships per day not including sporting boats and other small watercraft in 2009. It saves an average of , instead of the voyage around the Jutland peninsula. The North Sea Canal connects Amsterdam with the North Sea. North Sea The North Sea is a marginal sea of the Atlantic Ocean located between the United Kingdom (particularly England and Scotland), Denmark, Norway, Sweden, Germany, the Netherlands,
Geology of the Baltic Sea are however absent in the whole Baltic area except for the southern fringes. Scientists do not agree on how the present depression the Baltic Sea occupies formed. Scholars like Voipio (1981) and Šlaiupa (1995) consider the depression to have been formed in the Cenozoic, before the Quaternary, by tectonic processes. Some others like Marks (2004) stress erosion was key to the formation of the depression. In the Cenozoic, long before the Quaternary glaciations the Baltic was the site of a large river called Eridanos. This river drained west in direction towards the North Sea. The Neogene uplift of the South