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Palaeoceanography and biogeography in the Early Jurassic Panthalassa and Tethys Oceans

Arias Fernández, María del Carmen (2008) Palaeoceanography and biogeography in the Early Jurassic Panthalassa and Tethys Oceans. Gondwana research, 14 . pp. 306-315. ISSN 1342-937X

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Abstract

A first conceptual palaeoceanographic model for the Early Jurassic Panthalassa and Tethys Oceans is outlined in the present paper. The new
palaeoceanographic model uses fundamental physic–oceanographic principles known from the modern world and a global palaeogeographic
reconstruction for the Early Jurassic to examine the long-term response of the Panthalassic and Tethyan fossil invertebrate faunas to the proposed
surface ocean circulation. Analysis of palaeobiogeographical data (ostracods, ammonites, brachiopods and bivalves) has enabled circulation
changes to be reconstructed over the studied period in some detail. Panthalassic circulation pattern shows an almost hemispherical symmetric
pattern, with the development of the two large subtropical gyres that rotates clockwise in the northern hemisphere and anti-clockwise in the
southern hemisphere. Surface circulation in the Tethyan Ocean is dominated by monsoonal westerly-directed equatorial surface currents that
reached its western corner and droved them off to the north, along the northern side of the Tethys Ocean, during summer and in opposite direction
during the winter.

Item Type:Article
Uncontrolled Keywords:Early Jurassic; The Panthalassa Ocean; The Tethys Ocean; Ocean currents; Climate models
Subjects:Sciences > Geology > Paleontology
ID Code:12212
Deposited On:09 Feb 2011 13:53
Last Modified:09 Feb 2011 13:53

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