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Subspheroids in the lithic assemblage of Barranco León (Spain): Recognizing the late Oldowan in Europe

Fig 4

Graphic representation of the methodology used for the diacritical drawings of the polyhedral/subspheroid lithic tools from BL.

Impact points and negative directions are indicated and the different reduction phases are highlighted by different colors.

Fig 4

doi: https://doi.org/10.1371/journal.pone.0228290.g004