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STRATI 2013 pp 1129-1133 | Cite as

Lower Cretaceous Pollen–Spore and Mesofossil Associations of the Bombarral Formation (Lusitanian Basin, Western Portugal)

  • Mário Miguel MendesEmail author
  • Jorge Dinis
  • João Pais
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

The Lower Cretaceous of the Lusitanian Basin (western Portugal) contains rich assemblages of plant remains. The study of the palynological and mesofossil flora of the Berriasian Bombarral Formation in Vale Painho, near Juncal, contributes to ascertaining the environmental conditions during deposition, the vegetation diversity, and the unit’s age. The fossil site is just below the base of the Figueira da Foz Formation, a basin-wide breakup paraconformity. Regional correlation with biostratigraphically dated units (Lourinhã p.p., Farta Pão, Porto da Calada, and Serreira) points to a Berriasian age for the top of the Bombarral Formation. The Vale Painho palynological assemblage is clearly dominated by fern spores and gymnosperm pollen. The mesofossil flora is characterized by seeds of conifers or taxa related to the Bennettitales– Erdtmanithecales–Gnetales (BEG) group, in agreement with palynomorphs. No angiosperm remains were recognized. The assemblage is very similar to the Berriasian to Valanginian Bornholm flora (Denmark). Plant features and sedimentary proxies indicate a hot climate with marked seasonality in precipitation.

Keywords

Bombarral Formation Lower Cretaceous Berriasian Mesofossils Palynomorphs Portugal 

Notes

Acknowledgments

This work is a contribution to projects ANGIOGAL (PTDC/CTE-GIX/104999/2008) and CretaCarbo (PTDC/CTE-GIX/113983/2009), funded by the “Fundação para a Ciência e a Tecnologia” (FCT) and COMPETE Programme/FEDER European Fund. It is, also, a contribution to project PEst-OE/CTE/UI4073/2014.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Mário Miguel Mendes
    • 1
    Email author
  • Jorge Dinis
    • 2
    • 3
  • João Pais
    • 1
  1. 1.CICEGe, Departamento de Ciências da Terra, Faculdade de Ciências e TecnologiaUnversidade Nova de LisboaCaparicaPortugal
  2. 2.Earth Science DepartmentUniversity of Coimbra, Largo Marquês de PombalCoimbraPortugal
  3. 3.IMAR-CMAMarine and Environmental Research CentreCoimbraPortugal

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