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Zühlsdorff, Christine; Hanebuth, Till J J; Henrich, Rüdiger (2008): High-resolution sediment record from a submarine meandering canyon system in the eastern Atlantic. PANGAEA,, Supplement to: Zühlsdorff, C et al. (2008): Persistent quasi-periodic turbidite activity off Saharan Africa and its comparability to orbital and climate cyclicities. Geo-Marine Letters, 28(2), 87-95,

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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.
Related to:
Holz, Christine (2005): Climate-induced variability of fluvial and aeolian sediment supply and gravity-driven sediment transport off Northwest Africa. PhD Thesis, Elektronische Dissertationen an der Staats- und Universitätsbibliothek Bremen, Germany, urn:nbn:de:gbv:46-diss000012051
Latitude: 19.450500 * Longitude: -18.089000
Date/Time Start: 2003-04-27T21:11:00 * Date/Time End: 2003-04-27T21:11:00
GeoB8509-2 * Latitude: 19.450500 * Longitude: -18.089000 * Date/Time: 2003-04-27T21:11:00 * Elevation: -2585.0 m * Recovery: 9.04 m * Campaign: M58/1 * Basis: Meteor (1986) * Device: Gravity corer (Kiel type) (SL) * Comment: see core description
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