DescriptionCross sections of African elephant and woolly mammoth tusks.png
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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{{Information |description=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). |date=2019 |source=https://www.nature.com/a...
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