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Abrasion of Kem Kem fossils (FSAC-KK collection). A Iferda N’Ahouar B Valley near Boumerade. X-axis is the abrasion index (0-4; see Table 3); Y-axis is the number of specimens. Specimen counts in A: 0 37, 1 58, 2 40, 3 13, 4 4. Specimen counts in B: 0 17, 1 15, 2 11, 3 4, 4 3.
