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A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

View ORCID ProfileBlanca Cantalejo, Kevin T. Pickering, View ORCID ProfileConall McNiocaill, View ORCID ProfilePaul Bown, Kyrre Johansen and Melissa Grant
Journal of the Geological Society, 178, jgs2019-131, 8 October 2020, https://doi.org/10.1144/jgs2019-131
Blanca Cantalejo
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
  • Find this author on Google Scholar
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  • ORCID record for Blanca Cantalejo
  • For correspondence: ucfbbca@ucl.ac.uk
Kevin T. Pickering
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
Roles: [Funding acquisition (Supporting)], [Investigation (Supporting)], [Methodology (Supporting)], [Supervision (Lead)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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Conall McNiocaill
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Funding acquisition (Lead)], [Investigation (Equal)], [Methodology (Equal)], [Supervision (Lead)]
  • Find this author on Google Scholar
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  • ORCID record for Conall McNiocaill
Paul Bown
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
Roles: [Formal analysis (Equal)], [Methodology (Equal)], [Supervision (Lead)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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  • ORCID record for Paul Bown
Kyrre Johansen
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Investigation (Supporting)], [Methodology (Supporting)]
  • Find this author on Google Scholar
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Melissa Grant
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Investigation (Supporting)], [Methodology (Supporting)]
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Abstract

Using new palaeomagnetic and biostratigraphic data, we revise the age-model for the middle Eocene, deep-marine Aínsa Basin (Spanish Pyrenees), a tectonically active basin formed at a convergent-plate margin. This new age model provides a framework for evaluating the depositional history and sediment accumulation rates. New integrated magneto- and biostratigraphy data identify two normal and two reverse chrons of the geomagnetic polarity timescale (C21r, C21n, C20r, C20n) and place these Upper Hecho Group deposits in the middle Eocene (Lutetian). Nannofossil analysis identifies a biostratigraphic range from Subzone NP14b in the Gerbe System to Subzone NP15b at the top of the Aínsa System using key, age-diagnostic marker species such as Blackites inflatus, Blackites piriformis and Coccolithus gigas. We also present new nannofossil biostratigraphy from the Lower Hecho Group. This new Aínsa Basin chronostratigraphy enables inter-basinal correlations between the proximal fluvio-deltaic Tremp-Graus Basin and the more distal Jaca Basin, thereby providing a better understanding of the basin evolution.

Supplementary materials: Field photographs of the sampled sections, magnetostratigraphic results, biostratigraphy results, alternative age model scenario and discussion on previous age model are available at https://doi.org/10.6084/m9.figshare.c.5083076

  • © 2020 The Author(s). Published by The Geological Society of London. All rights reserved
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Journal of the Geological Society: 178 (1)
Journal of the Geological Society
Volume 178, Issue 1
January 2021
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A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

Blanca Cantalejo, Kevin T. Pickering, Conall McNiocaill, Paul Bown, Kyrre Johansen and Melissa Grant
Journal of the Geological Society, 178, jgs2019-131, 8 October 2020, https://doi.org/10.1144/jgs2019-131
Blanca Cantalejo
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Blanca Cantalejo
  • For correspondence: ucfbbca@ucl.ac.uk
Kevin T. Pickering
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
Roles: [Funding acquisition (Supporting)], [Investigation (Supporting)], [Methodology (Supporting)], [Supervision (Lead)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Conall McNiocaill
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Funding acquisition (Lead)], [Investigation (Equal)], [Methodology (Equal)], [Supervision (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Conall McNiocaill
Paul Bown
1Department of Earth Sciences, University College London (UCL), Gower Street, , UK
Roles: [Formal analysis (Equal)], [Methodology (Equal)], [Supervision (Lead)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Paul Bown
Kyrre Johansen
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Investigation (Supporting)], [Methodology (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Melissa Grant
2Department of Earth Sciences, University Oxford, South Parks Road, , UK
Roles: [Formal analysis (Equal)], [Investigation (Supporting)], [Methodology (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site

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A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

Blanca Cantalejo, Kevin T. Pickering, Conall McNiocaill, Paul Bown, Kyrre Johansen and Melissa Grant
Journal of the Geological Society, 178, jgs2019-131, 8 October 2020, https://doi.org/10.1144/jgs2019-131
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