TY  - JOUR
T1  - Quantitative Biogeography of the Upper Aalenian-Lower Bajocian Ammonites (Western Tethys): Application of the Multivariate Methods
AU - , A. Marok AU - , A. Sebane AU - , L. Mekahli AU - , S. Elmi 
JO  - Online Journal of Earth Sciences
VL  - 1
IS  - 2
SP  - 113
EP  - 118
PY  - 2007
DA  - 2001/08/19
SN  - 1991-7708
DO  - ojesci.2007.113.118
UR  - https://makhillpublications.co/view-article.php?doi=ojesci.2007.113.118
KW  - Biogeography
KW  -ammonites
KW  -upper aalenian-lower bajocian
KW  -multivariate method
AB  - 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.
ER  -