New latitude-based nannofossil zonations for the Campanian-Maastrichtian of the South Atlantic Ocean and their paleoceanographic implications

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doi: 10.1016/j.palaeo.2016.04.010
Author(s): do Monte Guerra, Rodrigo; Concheyro, Andrea; Wise, Sherwood W., Jr.; Kender, Sev; Fauth, Gerson
Author Affiliation(s): Primary:
Universidade do Vale do Rio dos Sinos, Instituto Tecnologico de Micropaleontologia, Sao Leopoldo, Brazil
Instituto Antártico Argentino, Argentina
Florida State University, United States
University of Nottingham, United Kingdom
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.452, p.55-67. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Estudios Andinos Don Pablo Groeber Contrib. No. R-178. 80 refs.; illus., incl. 1 table, sketch map
Summary: The global evolution of calcareous nannofossils during the Campanian-Maastrichtian interval is not fully understood, and nannofossil zonations for the central and South Atlantic Ocean are yet to be constructed. Here, we test the applicability of previous calcareous nannofossil zonations developed for other ocean basins, for biostratigraphy in the South Atlantic Ocean, and refine Campanian-Maastrichtian biostratigraphy in the region. We document calcareous nannofossil distributions at Deep Sea Drilling Project (DSDP) and Ocean Drilling Program (ODP) sites from the high, mid and low latitudes in the South Atlantic Ocean (DSDP Sites 354, 356, 511, 525A, and 530A, and ODP Sites 690C; 700B; 661A, and 1258A). Combining nannofossil occurrences with magnetostratigraphic schemes previously constructed for some of the sites, we propose three new zonations tied to the global magnetostratigraphic chrons, with distinct bio-horizons selected at different latitudinal regions. In this study we present detailed definitions of new South Atlantic Ocean Low-latitude (SAL), South Atlantic Mid-latitude (SAM) and South Atlantic High-latitude (SAH) zonations. We identified significant diachronism of some species between latitudes throughout the Campanian and Maastrichtian. These species diachronism, mainly between zonal markers from low and mid latitudes during the late Maastrichtian, was probably related to migration patterns due to fundamental paleoceanographic changes. Abstract Copyright (2016) Elsevier, B.V.
Year of Publication: 2016
Research Program: DSDP Deep Sea Drilling Project
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Atlantic Ocean; Biostratigraphy; Biozones; Campanian; Ceara Rise; Cretaceous; DSDP Site 354; DSDP Site 356; Deep Sea Drilling Project; Demerara Rise; Equatorial Atlantic; Leg 108; Leg 207; Leg 39; Maestrichtian; Magnetostratigraphy; Mesozoic; Microfossils; Nannofossils; North Atlantic; Northwest Atlantic; ODP Site 1258; ODP Site 661; Ocean Drilling Program; Paleoclimatology; Plantae; South Atlantic; Upper Cretaceous; West Atlantic
Coordinates: S650938 S510017 E0011218 W0465818
S290415 S191116 E0092310 E0025907
N055356 N092649 W0192310 W0544400
S281713 S281713 W0410517 W0410517
Record ID: 2016056420
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands