Einsele, Gerhard; Elouard, P; Herm, D; Kögler, Friedrich-Christian; Schwarz, Hans Joachim (1977): Age determination of sediment cores from the shelf off Mauretania, West Africa [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.548432, Supplement to: Einsele, G et al. (1977): Source and biofacies of late Quaternary sediments in relation to sea level on the shelf off Mauritania, West-Africa. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C26, 1-43
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Abstract:
The 60 km wide shelf off Mauritania is cut by several submarine canyons. Its water-circulation is controlled by the cool Canary current and upwelling.
Its Recent sediments show faunal associations remarkably related to the grain size distribution which in water depths between 40 and 80 m is strongly influenced by reworking of older coarse sand or sandstone. In this depth range a mixed biofacies originating from Pleistocene and Recent material is encountered. The present lateral faunistic and sedimentological facies change, including horizons of mixed provenance, can be recognized in vertical sequences taken by vibro-coring. This correlation combined with 14C-datations on molluscs enable the reconstruction of the history of the last glacial regression and transgression.
Due to the arid climate, the emerging calcareous shelf sediments are indurated and, therefore, protected from subaerial and submarine erosion. During low sea level eolian sand migrates over the shelf, but only about 1/10 of this material remains there and is later incorporated into the sandy shelf sediments. The calculated average rate of total sedimentation during Holocene is 15 cm, and the production rate of carbonate is 5 cm/1000 years.
Coverage:
Median Latitude: 18.435000 * Median Longitude: -16.336667 * South-bound Latitude: 18.300000 * West-bound Longitude: -16.455000 * North-bound Latitude: 18.583333 * East-bound Longitude: -16.246667
Date/Time Start: 1971-11-26T00:00:00 * Date/Time End: 1971-11-27T00:00:00
Event(s):
GIK12355-1 * Latitude: 18.335000 * Longitude: -16.246667 * Date/Time: 1971-11-26T00:00:00 * Elevation: -25.0 m * Location: East Atlantic * Campaign: M25 * Basis: Meteor (1964) * Method/Device: van Veen Grab (VGRAB)
GIK12358-1 * Latitude: 18.300000 * Longitude: -16.383333 * Date/Time: 1971-11-26T00:00:00 * Elevation: -74.0 m * Location: East Atlantic * Campaign: M25 * Basis: Meteor (1964) * Method/Device: van Veen Grab (VGRAB)
GIK12367-1 * Latitude: 18.521667 * Longitude: -16.455000 * Date/Time: 1971-11-27T00:00:00 * Elevation: -70.0 m * Location: East Atlantic * Campaign: M25 * Basis: Meteor (1964) * Method/Device: van Veen Grab (VGRAB)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Einsele, G; Elouard, P; Herm, D et al. (1977): Age determination of sediment core GIK12355-1, shelf off Mauretania, West Africa (Table1). https://doi.org/10.1594/PANGAEA.527927
- Einsele, G; Elouard, P; Herm, D et al. (1977): Age determination of sediment core GIK12358-1, shelf off Mauretania, West Africa (Table1). https://doi.org/10.1594/PANGAEA.527928
- Einsele, G; Elouard, P; Herm, D et al. (1977): Age determination of sediment core GIK12367-1, shelf off Mauretania, West Africa (Table1). https://doi.org/10.1594/PANGAEA.527929
- Einsele, G; Elouard, P; Herm, D et al. (1977): Age determination of sediment core GIK12370-1, shelf off Mauretania, West Africa (Table1). https://doi.org/10.1594/PANGAEA.527930