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

M. Garcés ^[1] ; J. Agustí ^[2] ; J.M. Parés ^[1]
1. [1] Instituto de Ciencias de la Tierra Jaume Almera
  
  Instituto de Ciencias de la Tierra Jaume Almera
  
  Barcelona, España
2. [2] Institut de Paleontologia Miquel Crusafont, Escola Industrial, Sabadell
Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 5, 1996, págs. 1033-1036
Idioma: español
Títulos paralelos:
- Continental magnetochronology of the Late Pliocene in the Guadix-Baza Basin (Betics, Spain)
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Resumen
- 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.