Online Journal of Earth Sciences
ISSN: Online 1994-4632ISSN: Print 1991-7708
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Abstract
In order to quantify the biogeographic dynamics of ammonites faunas of Upper Aalenian-Lower Bajocian, 9 areas located in Western Tethys were analyzed by the multivariate method (Principal coordinate analysis and calculating similarity index and distance). The results obtained reveal the following facts: -the stability and resemblance during the time of faunas of the Betic Cordillera, Iberian Cordillera, central High Atlas and the Lusitanian basin,-the fluctuation starting from the Laeviuscula zone of Dorset-Somerset, the basin of South-east of France and the folded Middle Atlas. This fluctuation is controlled by several factors: paleotemperature, eustatism, paleogeography, and trophic conditions,-the isolation of faunas of Beni Snassen and Umbria-Marche Apennines.
How to cite this article:
A. Marok , A. Sebane , L. Mekahli and S. Elmi . Quantitative Biogeography of the Upper Aalenian-Lower Bajocian Ammonites (Western Tethys): Application of the Multivariate Methods.
DOI: https://doi.org/10.36478/ojesci.2007.113.118
URL: https://www.makhillpublications.co/view-article/1991-7708/ojesci.2007.113.118