Relative abundances of planktonic foraminifera from surface sediments of the Drake Passage, Southern Ocean (Table 1) ...

• Main Author: Herb, René
• Format: Dataset
• Language: English
• Published: PANGAEA 1968
• Subjects: Sample code/label; LATITUDE; LONGITUDE; Depth, bathymetric; DEPTH, sediment/rock; Foraminifera, planktic; Globigerina pachyderma; Globigerina sp.; Globigerina quinqueloba; Globigerina bulloides; Globigerina megastoma; Globorotalia inflata; Globorotalia truncatulinoides; Globorotalia scitula; Globigerinita glutinata; Globigerinita uvula; Orbulina universa; Echosounder; Counting 32-500 µm fraction; Antarctic; Drake Passage; Petersen; Southern Ocean; The Antarctic; Antarc*; Antarctica; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.407401; https://doi.pangaea.de/10.1594/PANGAEA.407401

Based on a qualitative and quantitative evaluation of Recent sediments samples (top 3 cm of cores as well as Petersen grab samples) from the Drake Passage, between South America and Antarctica, the distribution of planktonic foraminifera and their relation to oceanographic conditions was investigated. The Antarctic Convergence - the northern limit of the cold Antarctic Surface Water - is shown to be of major importance in controlling the distributional pattern of planktonic species as well as their total numbers. South of the convergence, Globigerina pachyderma is usually the only species found in the sediment. It occurs with abundances not greater than 6000 per gram dry sediment, and at most stations less than 100 specimens per gram of dry sediment were recovered. At a number of deep-sea stations below 3700 m depth approx. no planktonic foraminifera were found at all. It is most probable, that at least some of these stations are located below the limit of CaCO3 dissolution. North of the Antarctic ... : Supplement to: Herb, René (1968): Recent planktonic foraminifera from sediments of the Drake Passage, Southern Ocean. Ecologae Geologicae Helvetiae, 61(2), 467-480 ...