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Rates of sedimentation on the Cape Verde Rise
Eisma, D.; Passchier, C.A. (1978). Rates of sedimentation on the Cape Verde Rise. Neth. J. Sea Res. 12(1): 107-114
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
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| Auteurs | | Top |
- Eisma, D., meer
- Passchier, C.A.
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| Abstract |
The hypothesis that the Cape Verde Rise, situated on the lee-side of the Canaries current and being an area of low current velocities, would be a sediment trap, was tested by determining Holocene sedimentation rates on the Rise as well as in the adjacent ocean. The rates were found to vary between 1,9 and 2,6 cm per 1000 years and were not higher on the Rise than in the deeper ocean around it, indicating that under the present conditions of sediment supply, current pattern and bottom configuration the Cape Verde Rise is not a sediment trap. During the Holocene, sedimentation has been rather uniform, consisting of fine-grained mineral particles and (organic) carbonate, but during the Würm period also turbidites, large amounts of volcanic minerals and fine quartz of probably eolian origin were deposited. The data on the Würm and Eemian deposits are not sufficient to compare sedimentation rates on the Rise with those in the adjacent ocean. The sedimentation rates found for the Holocene agree well with those found by others in this area. |
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