10.1594/PANGAEA.548418
Diester-Haass, Lieselotte
Lieselotte
Diester-Haass
Schrader, Hans-Jürgen
Hans-Jürgen
Schrader
Thiede, Jörn
Jörn
Thiede
0000-0002-3452-2208
Sedimentological and paleoclimatological investigation of two sediment cores off Cape Barbas, North-West Africa
PANGAEA
1973
Kasten corer
M25
Meteor (1964)
Institute for Geosciences, Christian Albrechts University, Kiel (GIK/IfG)
1971-11-02T00:00:00/1971-11-30T00:00:00
en
Supplementary Publication Series of Datasets
8 datasets
application/zip
Creative Commons Attribution 3.0 Unported
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.
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
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East Atlantic