@article{MAKHILLOJES20071225361,
    title = {Quantitative Biogeography of the Upper Aalenian-Lower Bajocian Ammonites (Western Tethys): Application of the Multivariate Methods},
    journal = {Online Journal of Earth Sciences},
    volume = {1},
    number = {2},
    pages = {113-118},
    year = {2007},
    issn = {1991-7708},
    doi = {ojesci.2007.113.118},
    url = {https://makhillpublications.co/view-article.php?issn=1991-7708&doi=ojesci.2007.113.118},
    author = {A. Marok,A. Sebane,L. Mekahli and},
    keywords = {Biogeography,ammonites,upper aalenian-lower bajocian,multivariate method},
    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.}
    }