Early Toarcian (Jurassic) brachiopods from the Balearic Islands (Spain) and their paleobiogeographic context.

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García Joral, Fernando and Goy, Antonio and Rosales, Idoia and Barnolas Cortina, Antonio and Sevillano, Ana and López García, José María (2022) Early Toarcian (Jurassic) brachiopods from the Balearic Islands (Spain) and their paleobiogeographic context. Journal of iberian geology . ISSN 1698-6180

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Official URL: https://doi.org/10.1007/s41513-022-00197-0



Abstract

The record of brachiopods in the Lower Toarcian of the Balearic Islands is described after a reassessment of previous works and new samplings in the Tramuntana Range of Mallorca. The recognized species have been assimilated to the assemblages described in the Iberian Range in the Tenuicostatum and Serpentinum biozones. Moreover, a detailed comparison with other Western Tethys basins and the study of the dispersion of the brachiopod faunas in relation with the Early Toarcian Oceanic Anoxic Event, allow to refine the paleobiogeographic relationship of the Balearic brachiopods. They belong to the Euro-Boreal Province of brachiopods in the Tenuicostatum Biochron and correspond to the”Spanish Fauna” that emerged after the deep paleobiogeographic disruption that took place at the base of Serpentinum Biochron. The occurrence of Prionorhynchia msougari Rousselle in the Serpentinum Zone of Mallorca indicates that, within this last assemblage, there would be a closer connection between the Balearic region and the southern margin of the Tethys (Betic and North African basins) than with the northern margin (Eastern Iberian Platform System and Eastern Pyrenees). This paleobiogeographic conclusion is consistent with the supposed position of the Balearic area in the Early Toarcian, on the southeastern margin of Iberia and near the Alboran and Kabylian margins.


Item Type:Article
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CRUE-CSIC (Acuerdos Transformativos 2022)

Uncontrolled Keywords:Brachiopods, Biostratigraphy, Paleobiogeography, Early Jurassic, Mass extinction, Western Tethys
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:74586
Deposited On:15 Sep 2022 10:48
Last Modified:15 Sep 2022 12:32

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