So far, the Pleistocene Series is not subdivided into formal units (i.e., Stages). Several solutions were proposed, and dedicated working groups are presently pursuing an agreed solution. Since the base of the Pleistocene is already pinned down at Vrica (Calabria, Southern Italy), only Middle and Upper Pleistocene are to be formally defined yet. Concerning the Middle Pleistocene, an agreement has been achieved by proposing the so-called “Ionian” Stage. Upon international agreement, the base of the Ionian Stage should be located close to the bottom of the Brunhes Chron, while its top would coincide with the base of the Upper Pleistocene, which in turn spans from the beginning of the last interglacial (i.e. Marine isotopic stage 5) to the base of the Holocene (~10.5 Ka). Especially suitable