The late Pliocene palaeoenvironments and palaeoclimates of the western Iberian Atlantic margin from the Rio Maior flora

Manuel Vieira*, Matthew James Pound, Diamantino I. Pereira

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
39 Downloads (Pure)

Abstract

Using a revised chronology, a new palynological study on the late Pliocene (Piacenzian and earliest Gelasian) Rio Maior site of the Tagus Basin in western Portugal has been undertaken from the F98 core. Combining light microscopy and scanning electron microscopy, a total of 127 different pollen and spore taxa have been identified from the Piacenzian Lake and indicate the presence of a subtropical to warm-temperate mixed forest during the majority of the Piacenzian (3.6–2.8 Ma). It is only in the latest Piacenzian (after 2.8 Ma) that progressive extinctions of climate sensitive taxa and a drop in diversity indicate a cooling and drying climate trend that has also been recorded from high-latitude localities. By the earliest Gelasian (2.58 Ma), a low diversity Ericaceae and Pinus dominated vegetation remained. The Piacenzian flora of Rio Maior also shows fluctuations in the presence of climate sensitive taxa and pollen-spore diversity that may be related to Piacenzian glaciations.

Original languageEnglish
Pages (from-to)245-258
Number of pages14
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume495
Early online date17 Jan 2018
DOIs
Publication statusPublished - 15 Apr 2018

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