Reply To: What is it?

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Jim Chandler

Hi Gail,  I have not collected any fossils in the West so I am not very familiar with fossils in that area.  My best guess to get the discussion going is that it is a bone of some kind. (maybe a hoof, but I am very much guessing.)  If I found a similar fossil in a marine sediment I might be tempted to call it a coral, but I think it may be a bone.  Where in South Dakota did you find it.  Combining the location with a geological map may help you narrow down what kind of environment it was formed in. A simple map is found at  

Also look at websites about the fossils of South Dakota.  

If it is a bone it does not look like it has much matrix to remove.  Hopefully someone more knowledgeable of fossils in your area will respond too.