Sedimentology of ODP Leg 104 holes ...

• Main Author: Henrich, Rüdiger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1989
• Subjects: Drilling/drill rig; Leg104; Joides Resolution; Ocean Drilling Program ODP; Norwegian Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.736351; https://doi.pangaea.de/10.1594/PANGAEA.736351

The long-term record of glacial/interglacial cycles indicates three major paleoceanographic regimes in the Norwegian Sea. The period since the first major glaciation over Scandinavia at 2.56 Ma is characterized by high-frequency, low-amplitude oscillations of ice-rafted debris inputs, a lowered salinity, and decreased carbonate shell production in surface waters as well as overall strong carbonate dissolution at the sea floor. These conditions indicate a more zonal circulation pattern in the Northern Hemisphere and a relative isolation of surface and bottom waters in the Norwegian Sea. The generally temperate glacial climate was only interrupted by episodic weak intrusions of warm Atlantic waters. These intrusions have been detected in considerable magnitude only at Site 644, and thus are restricted to areas much closer to the Norwegian shelf than during earlier periods. The interval from 1.2 to 0.6 Ma is characterized by an increase in carbonate shell production and a better preservation, as well as a ... : Supplement to: Henrich, Rüdiger (1989): Glacial/interglacial cycles in the Norwegian Sea: sedimentology, paleoceanography, and evolution of late Pliocene to Quaternary northern hemisphere climate. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 189-232 ...