Equus stenonis COCCHI as a biostratigraphical marker in the Neogene-Quaternary of the Western Mediterranean basin: Consequence on Galerian-Villafranchian chronostratigraphy |
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| Affiliation: | 1. Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, 10125 Torino, Italy;2. Istituto di Geoscienze e Georisorse, CNR, via Valperga Caluso 35, 10125 Torino, Italy;1. Instituto Nacional del Carbón (INCAR-CSIC), Francisco Pintado Fe, 26, 33011 Oviedo, Spain;2. Department of Applied Geosciences and Geophysics, University of Leoben, Peter Tunner Strasse 5, A-8700 Leoben, Austria;1. Central Scientific Research Institute of Geology of Industrial Minerals, ul. Zimina 4, Kazan, 420097, Russia;2. Kazan (Volga region) Federal University, ul. Kremlyovskaya 18, Kazan, 420008, Russia |
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| Abstract: | We cite the different forms of Equus stenonis COCCHI which allowed us to establish a time-scale from Middle Villafranchian to Galerian: the various E. stenonis forms can characterize the successive faunistic Units of Montopoli (Middle Villafranchian), St Vallier, Olivola, Tasso and Farneta (Upper Villafranchian) while the Galerian Phase is characterized by the appearance of Equus caballus.The Lower Villafranchian is characterized by the last form of Hipparion (Hipparion rocinantis Hernandez Pachelo); its age is considered by us to be greater than 3 Ma, in contrast with the age of 2.6-2.4 Ma cited in the French literature for the Les Etouaires deposit, which is incompatible with other documented ages of Lower and Middle Villafranchian deposits.We consider the Galerian Phase to be equivalent to the entire Middle Pleistocene, and we propose a chronostratigraphical subdivision. |
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