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Mammoth lower tooth. (Mammothus imperator)
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Baby mammoth tooth. 1 inch.
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Tusk cross section. If the cross-hatch patterns (called "Schreger-Patterns") run at angles close to 125 degrees, the tusk belonged to a mastodon. Mammoth patterns cross at about 90 degrees.
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Mammoth vertebra.
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Mammoth skull fragment. The hollow chambers -- or air pockets -- help hold up the animal's massive skull.
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