Hvor blev nordsøen den engelske kanal?
English Channel
Kanalen er geologisk set af nyere dato, idet den har været tørt land i det meste af Pleistocæn. Før Devensian istiden (den seneste istid, der sluttede for ca. 10.000 år siden) var Storbritannien og Irland en del af det europæiske fastland, der var forbundet af en ubrudt Weald-Artois-anticline, en højderyg, der fungerede som en naturlig dæmning, der holdt en stor ferskvandssø fra istiden tilbage i Doggerland-regionen, der nu ligger under Nordsøen. I denne periode var Nordsøen og næsten alle de britiske øer dækket af is. Søen blev tilført smeltevand fra Østersøen og fra den kaledonske og den skandinaviske indlandsis, der sluttede sig til hinanden mod nord og blokerede dens udløb. Havniveauet var ca. 120 m lavere end i dag. For mellem 450.000 og 180.000 år siden brød mindst to katastrofale oversvømmelser af gletsjersøer ud i Weald-Artois-antiklinalen.
English Channel
The Channel is of geologically recent origin, having been dry land for most of the Pleistocene period. Before the Devensian glaciation (the most recent ice age, which ended around 10,000 years ago), Britain and Ireland were part of continental Europe, linked by an unbroken Weald-Artois Anticline, a ridge that acted as a natural dam holding back a large freshwater pro-glacial lake in the Doggerland region, now submerged under the North Sea. During this period the North Sea and almost all of the British Isles were covered by ice. The lake was fed by meltwater from the Baltic and from the Caledonian and Scandinavian ice sheets that joined to the north, blocking its exit. The sea level was about 120 m (390 ft) lower than it is today. Then, between 450,000 and 180,000 years ago, at least two catastrophic glacial lake outburst floods breached the Weald–Artois anticline.
English Channel