Magnetocronología del Plioceno superior continental de la cuenca de Guadix-Baza (Cordilleras Béticas)

  1. M. Garcés 1
  2. J. Agustí 2
  3. J.M. Parés 1
  1. 1 Institut de Ciencies de La Terra "Jaume Almera", CSIC. Barcelona
  2. 2 Institut de Paleontologia Miquel Crusafont, Escola Industrial, Sabadell
Revista:
Geogaceta

ISSN: 0213-683X

Any de publicació: 1996

Número: 20

Pàgines: 1033-1036

Tipus: Article

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Altres publicacions en: Geogaceta

Resum

Stratigraphic superposition of mammal fossil-rich localities makes the Galera section (Baza Fm, Guadix-Baza Basin, Betics) very appropriate for magnetostratigraphic dating of the Late Pliocene continental biochronology. Independent correlation to the geomagnetic polarity time scale provides a precise calibration of the late Ruscinian and Villanian local mammal zones. The Mimomys occitanus zone (MN75) ranges from chron (2Ar to the upper half of C2An, the Ruscinian/Villanian boundary being placed between 2.7 and 3.3 Ma. Earliest record of the Mimomys cappettai zone is found above the Gauss/Matuyama boundary (2An/2r at 2.58 Ma). The early/late Vil/anian boundary (MN7 6/MN7 7) is recorded in the upper half of C2r, between 2.0 Ma and 2.3 Ma. A sedimentary hiatus of 300 kyr is suggested to correlate to a lower Villanian basin-wide unconformity.

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