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Showing results for tags 'cementum'.
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This was found on a river gravel bar in southern Minnesota. There are glacial gravel deposits in the area. I believe it may be a piece of tusk bark (the outer bark or cementum) Thoughts?
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I have a focus on whale today because I recently obtained a few. This generally leads me to trying to understand and identify my finds. This in turn leads to questions. What is Whale Ivory? When I can not find answers or at least thoughtful discussion elsewhere, thanks for TFF. I found a PDF here: https://www.cites.org/sites/default/files/eng/resources/pub/E-Ivory-guide.pdf Nothing in the above definition of Whale Ivory ever uses the word "Ivory". What exactly is the whale Ivory? Modern Whale tooth -- Is the slightly yellow tip the enamel? Is the Cementum covering the Ivory? What about Fossil whale teeth like this Scaldicetus: The tip enamel is easily seen. Is the outer covering Cementum or Ivory or both?