Speculations about the Paleodepth of the Greenland-Scotland Ridge During Late Mesozoic and Cenozoic Times

  • Jörn Thiede
  • Olav Eldholm
Part of the Nato Conference Series book series (NATOCS, volume 8)

Abstract

The Greenland-Scotland transverse ridge has separated the deep basins of the Norwegian-Greenland Sea from the main North Atlantic Ocean since the early Cenozoic. Originally, it probably formed a large subaerial volcanic ridge which separated the Norwegian-Greenland Sea and the Arctic Ocean almost completely from the North Atlantic. The subsidence of the ridge which can be reconstructed from drilling data and the age-depth relationship of the adjacent oceanic crust suggests that a land bridge existed until Eocene time. However, the main ridge platform did not sink below sea level before the middle Miocene and isolated peaks submerged as late as the Pliocene. Thus, the ridge has allowed exchange of surface water from Eocene-Oligocene times onward. We also suggest that changes in the sea level have to be considered when analysing the ridge as a barrier for surface water circulation.

Keywords

Europe Sedimentation Shale Drilling Cretaceous 

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Copyright information

© Springer Science+Business Media New York 1983

Authors and Affiliations

  • Jörn Thiede
    • 1
  • Olav Eldholm
    • 1
  1. 1.Department of GeologyUniversity of OsloOslo 3Norway

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