Marriage of the Sea ceremony of the sea continues to this day. It is performed by the mayor of Venice aboard a smaller ceremonial barge called the "Bissona Serenissima". Marriage of the Sea ceremony The Marriage of the Sea (), sometimes referred to as the Marriage of the Adriatic, was an ancient ceremony which used to symbolize the maritime dominion of Venice. The ceremony, established in about 1000 AD to commemorate the Doge Pietro II Orseolo's conquest of Dalmatia, was originally one of supplication and placation, Ascension Day being chosen as that on which the doge set out on his expedition. The form it took
Geology of the North Sea The sea level is to higher than present day levels. In northwestern Europe, chalk deposits from the Upper Cretaceous are characteristic for the Chalk Group, which forms the white cliffs of Dover on the south coast of England and similar cliffs on the French Normandian coast. The group is found in England, northern France, the low countries, northern Germany, Denmark and in the subsurface of the southern part of the North Sea. Stagnation of deep sea currents in middle Cretaceous times caused anoxic circumstances in the sea water. In many places around the world, dark anoxic shales were formed during