Sedimentological and paleoclimatological investigation of two sediment cores off Cape Barbas, North-West Africa, supplement to: Diester-Haass, Lieselotte; Schrader, Hans-Jürgen; Thiede, Jörn (1973): Sedimentological and paleoclimatological investigations of two pelagic ooze cores off Cape barbas, North-West Africa. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C16, 19-66

• Main Authors: Diester-Haass, Lieselotte, Schrader, Hans-Jürgen, Thiede, Jörn
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1973
• Subjects: Kasten corer; M25; Meteor 1964; Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG; The ''Y''; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.548418; https://doi.pangaea.de/10.1594/PANGAEA.548418

Two box cores taken off Cape Barbas (North-West Africa) have been studied using three methods. The analyses of the coarse fraction, of biogenic opal and of planktonic foraminifera revealed :1. Core GIK12310-4 penetrates Z, Y, X and upper part of W zone, whereas core GIK12379-1 penetrates Z and upper part of Y zone.2. Holocene sedimentation rates are 2.5 cm/1000 y for core GIK12310-4 and 6.0 cm/1000 y for core GIK12379-1. During the Y zone 5 cm/l000 y were sedimented incore GIK12310-4 and > 10-20 cm/1000 y in core GIK12379-1.3. Paleoclimatohgical results are: arid climate and relatively warm water temperatures during the Holocene (Z zone) and during X zone; humid climate and relatively cool water temperatures within the Wuerm (Y zone) (with a non-dated more arid interval found in the middle part of the Y zone) and in the upper part of the W zone.4. Increased contents of benthos and radiolaria in the Y zone indicate upwelling. Upwelling, characterized by high content of biogenic opal and low water temperatures, was found in core GIK12310-4 at 250 to 350 cm in the lower part of the Y zone.The plankton/benthos ratio of foraminifera, the benthos/radiolaria ratio and water temperatures derived from planktonic foraminifera, differ in both cores in the Holocene, and are nearly identical during the Wuerm.