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Found in NJ Cretaceous stream. Thought it may be a concretion at first, and it still may be, but upon closer inspection, it appears to have tooth marks in it which makes me think it is organic in some form. Any ideas? sorry no ruler scale here, will upload later. Approximately 6 inches in length, 2 to 3 inches wide.

Hi everyone. Iv'e been thinking about doing this for years and now, here I am! I have some interesting beach finds from "Sharks tooth island" and emerald isle, north carolina beaches. My favorite has obvious tooth marks. Black brown bone shard, about 1 inch long. Looks like something bit into the bone and cracked it open. There are a few molar marks and smaller tooth marks as well. The hole shown is I think a tendon insertion hole? So many predation marks on it. So cool! Any ideas of what the bone is and what had a good meal off of it?

I found this piece of dinosaur bone last summer while I was surface collecting in the Horseshoe Canyon area near Drumheller, Alberta. It wasn’t until I was home and cleaned the piece that I noticed what looks like tooth marks on the bone. Is it tooth marks on the bone? I know this is stretch but any idea what type of bone this may be (rib, leg, etc.)? Thanks for looking at this. Cherise

I have a coprolite that has me somewhat puzzled. It was found in a river in South Carolina and dates Miocene-Pliocene. I picked it up at the Tucson Gem Show because I thought it resembled some east coast coprolites with longitudinal striations/furrows/grooves that @MarcoSr posted a while back. Now that I've looked at it for a while and done a little prep work, I'm not so sure the grooves are sphincter related. There are intestinal muscle marks visible on one side, but they don't seem to match up with the grooves. The grooves were filled with sandstone/limestone. I left matrix in the deeper portions to preserve the integrity of the specimen. Across from the grooves are what look like puncture marks. My first thought was that they were clam borings. However, they do line up with the grooves in question. Now I'm wondering if these could be tooth marks as well. Under magnification, I noticed smaller tooth marks and an impression that I can't figure out. My imagination is now getting the best of me, and I'm seeing food chain activity. I'm seeing a big fish nabbing a small fish that was nabbing an invertebrate that was feasting on feces. Do you think the larger grooves and holes could be tooth marks? Does anyone have any idea what could have left the impression? The only thing I could think of is some sort of mollusk. Love your thoughts on this. @Carl

Hi all, So this little bone piece was found at the beach of Wassenaar, Netherlands; it’s from the late Pleistocene, 40’000 years old. I got two questions on this one: Is it possible to say anything more about this bone fragment (eg what animal/what part of the skeleton)? In the last picture, are those predation marks? I can take better pictures if needed. Thanks in advance for your help! Max