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Pliensbachian–Toarcian ostracod biogeography in NW Europe: Evidence for water mass structure evolution

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Arias Fernández, María del Carmen (2007) Pliensbachian–Toarcian ostracod biogeography in NW Europe: Evidence for water mass structure evolution. Palaeogeography, palaeoclimatology, palaeoecology (251). pp. 398-421. ISSN 0031-0182

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Official URL: http://www.elsevier.com/locate/palaeo



Abstract

This paper examines the role played by palaeoceanographic and climatic conditions on the palaeobiogeography of the
Pliensbachian–Toarcian ostracods (Early Jurassic) in the European Epicontinental Sea (EES). The influence of the
palaeogeography, ocean currents and sea level, temperature and salinity variations on ostracod abundance, diversity and migration
patterns is reconstructed. Ostracod migration follows an anticlockwise circulation in the eastern side of the EES, with a leading
northeast–southwest movement, and the frequent arrival of Tethyan faunas into the central and western parts of the EES during the
Pliensbachian. A three-fold classification of water masses based on salinity, temperature, lithological and fossil data is proposed.
The repeated inflow of Tethyan ostracods into the EES ended by the earliest Toarcian. This ostracod event is related to the opening
of the Hispanic Corridor and to the reorganization of the surface and deep circulations that may have generated a cold episode at the
beginning of the Toarcian.


Item Type:Article
Uncontrolled Keywords:Ostracod; Palaeobiogeography; Pliensbachian–Toarcian boundary; Water masses; Deep-water circulation; European Epicontinental Sea; Hispanic Corridor; Palaeoclimatology
Subjects:Sciences > Geology > Paleontology
ID Code:26707
Deposited On:15 Sep 2014 07:36
Last Modified:11 Dec 2018 08:42

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