Hi Jerry @jerry-hughes, I don’t think it’s a tooth. From the first photo, my gut reaction was that it was a piece of slag because it appears to have a metallic luster. However, the lineations on the other photos made me second guess myself. If it is a fossil, I’m thinking it is an internal mold of an invertebrate, possibly a barnacle or clam.
Thank you, Victor, for your response. When I collected it in the field, that’s exactly what I thought it was too! Since then, I’ve submitted it to various people who know their “stuff” and having more than a photo to go on, they have concluded that it was a tooth. (I actually found another tooth of the same kind at the same site but don’t have photos of that tooth “cleaned up” so it wouldn’t be of much value in a picture here.) One paleontologist, just by looking at the pictures, thought that it may be crocodilian but he is going to get a first-hand look at it soon so I hope for more info from him. I will post the answer if and when I get a positive I.D. Thank you again,