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Hildebrand-Habel, Tania; Willems, Helmut (2000): Calcareous dinoflagellates in Maastrichtian to early Miocene sediments of DSDP Hole 39-357. PANGAEA,, Supplement to: Hildebrand-Habel, T; Willems, H (2000): Distribution of calcareous dinoflagellates from the Maastrichtian to early Miocene of DSDP Site 357 (Rio Grande Rise, western South Atlantik Ocean). International Journal of Earth Sciences, 88(4), 694-707,

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The evolution of calcareous dinoflagellate communities has been investigated for the latest Cretaceous to earliest Neogene interval of the mid-latitude South Atlantic. In doing so, the response of calcareous dinoflagellates to Cenozoic climatic change has been addressed for the first time. Trends in species composition and distribution patterns of wall types indicate significant changes which correlate with major palaeoenvironmental modifications. A first major shift concerning the relative abundance of species and wall types occurred across the Cretaceous-Tertiary boundary. The associations remained stable during the entire Paleocene and Eocene. Only in the late Eocene did a dramatic decrease in temperature cause a slight diversification. A second major shift in the abundance patterns occurred across the Eocene-Oligocene boundary. The early Miocene warming is possibly reflected in the distinct increase in relative abundance of one species. The assemblages of calcareous dinoflagellates evidently react to major climatic changes during the Cenozoic. These poorly investigated organisms may thus provide an important contribution to the understanding of earth's palaeoclimatic evolution.
Related to:
Hildebrand-Habel, Tania (2002): Die Entwicklung kalkiger Dinoflagellaten im Südatlantik seit der höheren Oberkereide. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 192, 152 pp, urn:nbn:de:gbv:46-ep000103173
Hildebrand-Habel, Tania; Willems, Helmut (1999): New calcareous dinoflagellates from the Palaeogene of the South Atlantik Ocean (DSDP Site 357, Rio Grande Rise). Journal of Micropalaeontology, 18(1), 89-95,
Latitude: -30.004200 * Longitude: -35.559800
Date/Time Start: 1974-11-23T00:00:00 * Date/Time End: 1974-11-23T00:00:00
39-357 * Latitude: -30.004200 * Longitude: -35.559800 * Date/Time: 1974-11-23T00:00:00 * Elevation: -2086.0 m * Penetration: 797 m * Recovery: 344.3 m * Location: South Atlantic/CONT RISE * Campaign: Leg39 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 463.5 m cored; 9.5 m drilled; 74.3 % recovery
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