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. 2019 Oct 2;14(10):e0222680. doi: 10.1371/journal.pone.0222680

Fig 7. Quandong stone WW050A.

Fig 7

Specimen WW050A collected from a quandong grove under a tree. This quandong stone has a mortar facet on each face with a pit in the centre of each. Photographs by CP.