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, The Calabrian Stage. The proposal of using the Calabrian Stage to indicate the Lower Pleistocene has been accepted by international community of Quaternary scientists: the base of this stage is coincident with the GSSP in the Vrica section in Calabria, almost coincident with the top of Olduvai paleomagnetic event at 1.81 M.y. B.P. The top of the Calabrian Stage is conventionally located at the Matuyama-Brunhes magnetic reversal, whose age is 0.78 M.y. B.P. The stratigraphic interval of thefatcat:ippme2cxireqxldvmayn5mff2y