Sedimentological and paleoclimatological investigation of two sediment cores off Cape Barbas, North-West Africa
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1973
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| _version_ | 1867172220514598912 |
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| author | Diester-Haass, Lieselotte Schrader, Hans-Jürgen Thiede, Jörn |
| author_facet | Diester-Haass, Lieselotte Schrader, Hans-Jürgen Thiede, Jörn |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_548418 |
| institution | PANGAEA |
| language | en |
| publishDate | 1973 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sedimentological and paleoclimatological investigation of two sediment cores off Cape Barbas, North-West Africa Diester-Haass, Lieselotte Schrader, Hans-Jürgen Thiede, Jörn East Atlantic; GIK/IfG; GIK12310-4; GIK12379-1; Institute for Geosciences, Christian Albrechts University, Kiel; KAL; Kasten corer; M25; Meteor (1964) 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. |
| title | Sedimentological and paleoclimatological investigation of two sediment cores off Cape Barbas, North-West Africa |
| topic | East Atlantic; GIK/IfG; GIK12310-4; GIK12379-1; Institute for Geosciences, Christian Albrechts University, Kiel; KAL; Kasten corer; M25; Meteor (1964) |
| url | https://doi.org/10.1594/PANGAEA.548418 |