Magnetoestratigrafía del relleno Cenozoico de la Cuenca de Almazán

  1. L. Valero 1
  2. P. Huerta 2
  3. M. Garcés 1
  4. E. Beamud 3
  5. M. Gómez-Paccard 4
  6. I. Armenteros 2
  1. 1 Universitat de Barcelona
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    Universitat de Barcelona

    Barcelona, España

    ROR https://ror.org/021018s57

    Geographic location of the organization Universitat de Barcelona
  2. 2 Universidad de Salamanca
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    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

    Geographic location of the organization Universidad de Salamanca
  3. 3 Institut de Ciències de la Terra ‘JaumeAlmera’, CSIC
  4. 4 Instituto de Ciencias de la Tierra Jaume Almera
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    Instituto de Ciencias de la Tierra Jaume Almera

    Barcelona, España

    ROR https://ror.org/01nsd7y51

    Geographic location of the organization Instituto de Ciencias de la Tierra Jaume Almera
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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2012

Issue Title: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Issue: 13

Pages: 1200-1203

Type: Article

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Abstract

A new magnetostratigraphic study of the Paleogene continental infill of the Almazán basin is presented, combining magnetostratigraphic and biostratigraphic data. The studied section ranges from the northern margin of the basin throughout the northeastern limb of the Gómara monocline. This study includes the alluvial sediments of the Almazul Fm. (230m), which represents together with the underlying El Hocino Fm. the beginning of the sedimentation in the basin, the palustrine-lacustrine limesotnes of the Mazaterón Fm. (170 m) and the fluvial sandstones of the Gómara Fm. (2250 m). The resulting polarity sequence allows a correlation with the geomagnetic polarity time scale (GPTS), where the base of the studied section (Almazul Fm.) is in the chron C20, therefore a Lutetian (Eocene) age can be ascribed to its base. The Gómara Fm. represents the rest of the Bartonian, Priabonian and the most of the lower Oligocene, hence including the Eocene-Oligocene boundary. The top of the section is near the ChattianRupelian (Oligocene) boundary within the chron C10. From this correlation, the age of the Mazaterón and Miñana mammal sites, attributed to the MP15-16 mammal Paleogene reference levels, would be established in the lower Bartonian.

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