Diatom distribution in sediments of the Peruvian coastal upwelling
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PANGAEA
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| Auteurs principaux: | , |
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| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1990
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| _version_ | 1867169502299422720 |
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| author | Schrader, Hans-Jürgen Sorknes, Ragnhild |
| author_facet | Schrader, Hans-Jürgen Sorknes, Ragnhild |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Two shelf and upper-slope sites (681 and 686) near present cores of active coastal upwelling on the Peruvian margin were sampled continuously at 7.5 cm intervals down to approximately 25 meters below the seafloor (mbsf). Sedimentary structures were subdivided into homogeneous/bioturbated, laminated, and laminated-varved intervals. Diatom analysis and statistical treatment of data revealed almost persistent upwelling over the last 400,000 yr, with slightly increased upwelling during oxygen-isotope Stages 3, 5, 7, and 8 that resulted in anoxic bottom-water conditions and deposition of laminated/undisturbed primary sedimentary structures. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_753587 |
| institution | PANGAEA |
| language | en |
| publishDate | 1990 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Diatom distribution in sediments of the Peruvian coastal upwelling Schrader, Hans-Jürgen Sorknes, Ragnhild 112-681A; 112-686A; DRILL; Drilling/drill rig; Joides Resolution; Leg112; Ocean Drilling Program; ODP; South Pacific Ocean Two shelf and upper-slope sites (681 and 686) near present cores of active coastal upwelling on the Peruvian margin were sampled continuously at 7.5 cm intervals down to approximately 25 meters below the seafloor (mbsf). Sedimentary structures were subdivided into homogeneous/bioturbated, laminated, and laminated-varved intervals. Diatom analysis and statistical treatment of data revealed almost persistent upwelling over the last 400,000 yr, with slightly increased upwelling during oxygen-isotope Stages 3, 5, 7, and 8 that resulted in anoxic bottom-water conditions and deposition of laminated/undisturbed primary sedimentary structures. |
| title | Diatom distribution in sediments of the Peruvian coastal upwelling |
| topic | 112-681A; 112-686A; DRILL; Drilling/drill rig; Joides Resolution; Leg112; Ocean Drilling Program; ODP; South Pacific Ocean |
| url | https://doi.org/10.1594/PANGAEA.753587 |