Note:  Do not rely on this information. It is very old.

Dover Straitsof

Dover, Straits of, a narrow neck of water lying between Dover and Calais, and called by the French Pas de Calais, joining the North Sea and the English Channel, and having a depth of 6 to 29 fathoms and a width of 18 to 25 miles. The shallowness of the passage and the nature of the opposite coasts seem to prove that the Straits are of comparatively recent geological formation.