Distribution of planktic foraminifera in surface sediments and sedimentation rates of sediment cores from the Ibero-Moroccan continental rise and slope ...

• Main Author: Thiede, Jörn
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1973
• Subjects: Kasten corer; Box corer Reineck; Box corer; M19; M8; Meteor 1964; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.548417; https://doi.pangaea.de/10.1594/PANGAEA.548417

Cores from the Atlantic Ibero-Moroccan continental rise and slope contain fine-grained Late Pleistocene and Holocene sediments. These young sediments cover the continental margin in large lensformed litho- and biostratigraphically well-defined units. The total sedimentation rates range from 4 cm/ 1000 yrs. to 27 cm/1000 yrs. off Portugal and from 6 cm/1000 yrs. to 14 cm/1000 yrs. off Morocco. Only a small proportion of these sediments usually consists of sand-sized particles (>0.063 mm) which are mostly dominated by foraminifera. Both planktonic and benthic foraminifera are much more abundant in Late Pleistocene and Holocene samples from the upper slope in comparison to those from the deeper slope and from the abyssal plains. Total sedimentation rates during cool and warm climatic stages are rather similar for both groups of foraminifera. For example, in Late Holocene sediments 7 x 10**3 benthic and 201 x 10**3 planktonic foraminifera (fraction 0.63 -0.20 mm) per 100 cm**2 and 1000 yrs. are preserved in ... : Supplement to: Thiede, Jörn (1973): Sedimentation rates of planktonic and benthic foraminifera in sediments from the Atlantic continental margin of Portugal and Morocco. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C16, 1-18 ...