(Table T1) Radiolaria abundance of ODP Hole 175-1082A ...

• Main Author: Weinheimer, Amy L
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: Sample code/label; Radiolarians abundance; Radiolarian preservation; Spongodiscid sp.; Dictyocoryne profunda; Tetrapyle octacantha; Botryostrobus auritus/australis group; Spongurus cf. elliptica; Dictyocoryne sp.; Carpocanarium papillosum; Cornutella profunda; Spongopyle osculosa; Corocalyptra columba; Lamprocyrtis hannai; Larcopyle buetschlii; Lithelius minor; Dictyophimus gracilipes; Acrosphaera murrayana; Pterocanium trilobum; Eucyrtidium acuminatum; Helotholus histricosa; Lamprocyclas maritalis; Spongocore puella; Phormostichoartus corbula; Cycladophora davisiana; Dictyophimus crisiae; Pterocorys minythorax; Spongotrochus venustum; Anthocyrtidium zanguebaricum; Lampromitra quadricuspis; Pterocanium praetextum eucolpum; Pterocanium sp.; Pterocorys zancleus; Carpocanistrum sp.; Didymocyrtis tetrathalamus; Spongurus pylomaticus; Stylodictya aculeata; Spongaster tetras tetras; Theocalyptra bicornis; Lithomelissa setosa; Peripyramis circumtexta; Spongotrochus glacialis; Clathrocyclas bicornis; Lipmanella dictyoceras; Botryostrobus aquilonaris; Lithostrobus hexagonalis; Dictyophimus infabricatus; Theocorythium trachelium; Anthocyrtidium ophirense; Lamprocyrtis nigriniae; Antarc*; Antarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.787554; https://doi.pangaea.de/10.1594/PANGAEA.787554

A primary objective of Leg 175 was to investigate the upwelling history of the Benguela Current. Upwelling along the coast is found over the shelf in several well-established cells, as well as along the shelf-slope break, and extends over the 1000-m isobath. Streaming filaments along the coast also carry upwelled water off shore (Shannon, 1985). The upwelled nutrient-rich waters are sourced from the South Atlantic central water mass, which is a mixture of subtropical and subantarctic water masses. Below the central water mass lies Antarctic intermediate water (Shannon and Hunter, 1988, doi:10.2989/025776188784480735; Stramma and Peterson, 1989, doi:10.1175/1520-0485(1989)019<1440:GTITBC>2.0.CO;2).The upwelling system supports a robust marine community (Shannon and Pillar, 1986) where radiolarians are abundant (Bishop et al., 1978, doi:10.1016/0146-6291(78)90010-3). The endemic nature of radiolarians makes them useful in reconstructing the paleocirculation patterns. The biogeographic distribution of ... : Only radiolaria skeletons of the >45 µm fraction were counted (at 100x). Selected species were counted along 1-3 transects until a total of 300 specimens were counted. ...