Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain

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doi: 10.1016/j.cretres.2012.03.011
Author(s): Pérez-Rodríguez, Irene; Lees, Jacqueline A.; Larrasoaña, Juan C.; Arz, José A.; Arenillas, Ignacio
Author Affiliation(s): Primary:
Universidad de Zaragoza, Departamento de Ciencias de la Tierra, Paleontología, Saragossa, Spain
Other:
University College London, United Kingdom
Instituto Geológico y Minero de España, Spain
Volume Title: Cretaceous Research
Source: Cretaceous Research, Vol.37, p.100-126. Publisher: Elsevier, United Kingdom. ISSN: 0195-6671
Note: In English. Includes appendix. 86 refs.; illus., incl. 3 tables, geol. sketch map
Summary: The well-exposed and continuous uppermost Cretaceous in the coastal section of Zumaia (northern Spain) crops out as cyclic, deep-water, hemipelagic carbonate-rich sediments of significant geological interest. We present a new, high-resolution calibration of planktonic foraminiferal and calcareous nannofossil biostratigraphic datums, alongside new magnetostratigraphy. Six planktonic foraminiferal zones (Rugoglobigerina rotundata to Pseudoguembelina hariaensis) and nine nannofossil (sub)zones (UC15eTP? to UC20dTP) have been identified, encompassing the uppermost Campanian through uppermost Maastrichtian. Magnetostratigraphic data were obtained from the lower half of the section, where chrons C31r and C31n have been identified; the lithological nature of the upper part of the section provided spurious palaeomagnetic results. According to these data, the Campanian/Maastrichtian (C/M) boundary lies in Chron C31r at Zumaia. Differences between the planktonic foraminiferal and nannofossil datums at Zumaia and those from the Tercis boundary stratotype section (France) suggest that the biostratigraphic criteria used to identify the C/M boundary are problematic. We propose, therefore, two alternative, key biostratigraphic datums with which to determine the stratigraphic position of this boundary: the stratigraphic base occurrence datum (BO) of the planktonic foraminifer Pseudoguembelina palpebra and the top occurrence datum (TO) of the nannofossil Broinsonia parca subsp. constricta. The C31r/C31n magnetic polarity reversal, and the BOs of the planktonic foraminifer Racemiguembelina fructicosa and the nannofossil Lithraphidites quadratus are events that may prove useful in formally defining the lower/upper Maastrichtian boundary. Abstract Copyright (2012) Elsevier, B.V.
Year of Publication: 2012
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Abathomphalus mayaroensis partial-range Zone; Africa; Algae; Ammonoidea; Atlantic Ocean; Basque Provinces Spain; Biostratigraphy; Biozones; Blake Nose; Blake Plateau; Bottaccione Italy; Campanian; Cantabrian Basin; Cephalopoda; Characteristic remanent magnetization; Cretaceous; DSDP Site 525; Deep Sea Drilling Project; Europe; First occurrence; Foraminifera; France; IPOD; Iberian Peninsula; Invertebrata; Italy; Kalaat Senan Tunisia; Landes France; Leg 74; Lithraphidites quadratus; Lower Maestrichtian; Maestrichtian; Magnetization; Magnetostratigraphy; Mesozoic; Microfossils; Mollusca; Nannofossils; North Africa; North Atlantic; Northern Spain; Paleomagnetism; Planktonic taxa; Planoglobulina acervulinoides partial-range Zone; Plantae; Protista; Pseudoguembelina hariaensis partial-range Zone; Pseudoguembelina palpebra partial-range zone; Punta Aitzgorri; Racemiguelembelina fructicosa partial-range zone; Remanent magnetization; Rugoglobigerina rotundata partial-range zone; South Atlantic; Southern Europe; Spain; Stratigraphic boundary; Tercis les Bains France; Tunisia; Upper Campanian; Upper Cretaceous; Walvis Ridge; Western Europe; Zumaia Spain; Zumaia-Algorri Formation
Coordinates: N431756 N431756 W0021604 W0021604
Record ID: 2013037708
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands