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Refinements of the European Mammal Biochronology from the Magnetic Polarity Record of the Plio–Pleistocene Zújar Section, Guadix-Baza Basin, SE Spain

Published online by Cambridge University Press:  20 January 2017

Oriol Oms ,
Jaume Dinarès-Turell ,
Jordi Agustı́  and
Josep M. Parés
Oriol Oms
Affiliation:
Fac. Ciències, Geologia, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain, E-mail: orioloms@minorisa.es
Jaume Dinarès-Turell
Affiliation:
Institut de Ciències de la Terra “J. Almera” (C.S.I.C.), c/ Solé i Sabarı́s s/n, 08028, Barcelona, Spain, Paleomagnetic Laboratory (Fort Hoofddijk), Budapestlaan, 17, 3584 CD, Utrecht, The Netherlands, E-mail: dinares@geo.uu.nl
Jordi Agustı́
Affiliation:
Institut de Paleontologia “M. Crusafont,” c/ Escola Industrial 23, 08201, Sabadell, Spain, E-mail: inst.paleontologia@bcn.servicom.es
Josep M. Parés
Affiliation:
Institut de Ciències de la Terra “J. Almera” (C.S.I.C.), c/ Solé i Sabarı̀s s/n, 08028, Barcelona, Spain, E-mail: jmpares@umich.edu
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Abstract

The magnetobiostratigraphy study of the 130-m-thick Zújar section (Negratı́n clays unit, Guadix-Baza Basin, Spain) provides a remarkable opportunity to improve the correlation of European mammal biostratigraphy to the Geomagnetic Polarity Time Scale. The occurrence of 12 well-defined magnetozones and four paleontological sites with diagnostic faunas ranging from the MN 15 biozone (Ruscinian) to the MN 17 biozone (Villanyian), leads to an unambiguous correlation to chrons spanning from the Gilbert to the Matuyama epochs. This provides two new time constraints: (1) the boundary between MN 15 (Ruscinian) and MN 16 (Villanyian) biozones is recorded between chron C2An.3n and the base of chron C2An.2n and (2) the boundary between the upper and lower MN 16 subzones (Villanyian) is located between chron C2An.2n and the base of chron C2An.1n. The correlation between the Ruscinian–Villanyian boundary and the 3.3-myr-B.P. cooling event seems to be confirmed, while the early/late Villanyian boundary could be tentatively correlated to the glacial event at 2.6 myr B.P. Furthermore, MN 15 faunas are found in the lowermost part of chron C2Ar, which is in agreement with and reinforces the emplacement of the MN 14–MN 15 Ruscinian zones boundary at the reversal from chron 3n.1n to chron C2Ar.

Keywords

Plio–Pleistocenemagnetostratigraphymammal biochronologyBetic Cordillerared beds
Type
Original Articles
Information
Quaternary Research , Volume 51 , Issue 1 , January 1999 , pp. 94 - 103
Copyright
University of Washington

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