Radiolaria abundance and faunal indices of ODP Hole 183-1138A, Kerguelen Plateau ...

• Main Authors: Apel, Marcus, Kiessling, Wolfgang, Böhm, Florian, Lazarus, David B
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2002
• Subjects: Drilling/drill rig; Leg183; Joides Resolution; Ocean Drilling Program ODP; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.785250; https://doi.pangaea.de/10.1594/PANGAEA.785250

Three sites from Ocean Drilling Program (ODP) Leg 183 (Kerguelen Plateau) have been analyzed to document faunal change in high-latitude radiolarians and to compare the faunal change to Eocene-Oligocene climatic deterioration. Radiolarians are not preserved in Eocene sediments. In Oligocene sediments, radiolarian preservation improves in a stepwise manner toward the Miocene. A total of 115 species were found in lower Oligocene samples from Site 1138; all are documented herein. Radiolarian preservation is presumably linked to productivity triggered by climatic cooling during the early Oligocene. Similar patterns of improving preservation through the Eocene/Oligocene boundary are documented from several Deep Sea Drilling Project and ODP sites in the Southern Ocean, indicating a general pattern. In contrast to the Southern Kerguelen Plateau, however, proxies for productivity are more divergent at Site 1138 (Central Kerguelen Plateau). Whereas carbonate dissolution, as indicated by poor preservation of ... : Supplement to: Apel, Marcus; Kiessling, Wolfgang; Böhm, Florian; Lazarus, David B (2002): Radiolarian faunal characteristics in Oligocene sediments of the Kerguelen Plateau, Leg 183, Site 1138. In: Frey, FA; Coffin, MF; Wallace, PJ; Quilty, PG (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 183, 1-48 ...