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Figure 2

From: Mammoth ivory was the most suitable osseous raw material for the production of Late Pleistocene big game projectile points

Figure 2

Cross sections of the tusk samples with positions of samples for XRD and positions of measurement (red dots) marked. (a,b) Loxodonta africana. Note the annual growth rings and the >90° angle of the Schreger pattern. (c,d) Mammuthus primigenius. Note the annual growth rings and the <90° angle of the Schreger pattern (Photographs S. Döring, Senckenberg Research Institute, Research Station of Quaternary Palaeontology Weimar).

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