Planktic foraminifera across the Cretaceous-Tertiary transition in the Antarctic Ocean ...

• Main Author: Keller, Gerta
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1993
• Subjects: Drilling/drill rig; Leg113; Leg119; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Antarctic Ocean; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.683524; https://doi.pangaea.de/10.1594/PANGAEA.683524

Three Antarctic Ocean K/T boundary sequences from ODP Site 738C on the Kerguelen Plateau, ODP Site, 752B on Broken Ridge and ODP Site 690C on Maud Rise, Weddell Sea, have been analyzed for stratigraphic completeness and faunal turnover based on quantitative planktic foraminiferal studies. Results show that Site 738C, which has a laminated clay layer spanning the K/T boundary, is biostratigraphically complete with the earliest Tertiary Zones P0 and P1a present, but with short intrazonal hiatuses. Site 752B may be biostratigraphically complete and Site 690C has a hiatus at the K/T boundary with Zones P0 and P1a missing.Latest Cretaceous to earliest Tertiary planktic foraminiferal faunas from the Antarctic Ocean are cosmopolitan and similar to coeval faunas dominating in low, middle and northern high latitudes, although a few endemic species are present. This allows application of the current low and middle latitude zonation to Antarctic K/T boundary sequences. The most abundant endemic species is ... : Supplement to: Keller, Gerta (1993): The Cretaceous-Tertiary boundary transition in the Antarctic Ocean and its global implications. Marine Micropaleontology, 21(1-3), 1-45 ...