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PANGAEA
In:
Supplement to: Zühlsdorff, Christine; Hanebuth, Till J J; Henrich, Rüdiger (2008): Persistent quasi-periodic turbidite activity off Saharan Africa and its comparability to orbital and climate cyclicities. Geo-Marine Letters, 28(2), 87-95, https://doi.org/10.1007/s00367-007-0092-0
Publication Date:
2023-06-27
Description:
Based on a high-resolution sediment record from a submarine meandering canyon system offshore the present-day hyperarid Saharan Africa, two phases of turbidity-current activity can be distinguished during the past 13,000 years. Frequent, siliciclastic turbidity currents can be related to deglacial sea-level history, whereas rhythmically recurring fine-grained and carbonate-rich turbidity currents with recurrence times of roughly 900 years are inferred for the Holocene. Various trigger mechanisms can be considered to initiate turbidity currents, but only a few can explain a periodic turbidite activity. A comparison of Holocene turbidite recurrence times and basic cycles of 900 and 1,800 years found in various Holocene paleoclimate studies suggests that a previously unrecognized climate-related coupling may be active.
Keywords:
Center for Marine Environmental Sciences; GeoB8509-2; Gravity corer (Kiel type); M58/1; MARUM; Meteor (1986); SL
Type:
Dataset
Format:
application/zip, 4 datasets
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