Plio-Pleistocene

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The Plio-Pleistocene is an archaeological term that is coming into increasing use to describe a long and continuous run of dated sedimentary layers in East Africa[citation needed]. This archaeological pseudo-period dates from about 2.5 MYA to 1.5 MYA, straddling the boundary between the Pliocene and Pleistocene. The contents of its layers give a clear view of the continuous development of recent vertebrates, especially hominins.