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Found this today in a brook in Monmouth county. I'm stumped as to what it could be, I was thinking crab but I couldn't find anything to support that.

Location: Sweetwater, TX

Was down at Big Brook NJ today. Found a lot of the usual suspects. One though eludes my identification. Has enamel on it and is banded. Little bit larger than diameter of nickel.

Hello Fossil friends! I have a couple fossils(?) I'm going to see if I can get help identifying. I found all of them in the same local area of a river shore in northeastern Kansas, so I'm assuming Pennsylvanian time frame. I have some fossils that are obvious shells and coral, but these I'm not sure and would like your input! If you need more photos or angles, let me know. #1 I think is a fish vertebrae that's slightly flattened. It's about 1 cm x .3 cm.

Well, it’s Friday again so I’m digging though more ancient stockroom finds as I slowly get the new earth sciences lab put together. Today, I found this gem of randomness. Guess I have to spend the day identifying and categorizing... This part of my job is almost as fun as being in the field! I do wish my predecessors had kept even basic records, but as you can see there is some fun stuff in there. The Chiplodocus and Fragmentadon bits are likely The missing Orella member bits from another inventoried box!

Recently I took a trip up to central New Jersey in the US with my sister for our 2nd trip fossil hunting; at a place called “big brook preserve”. As I was sifting through looking at some fossils that I could identify such as shark teeth and fossilized poop with my very basic studying from the Internet and stuff I’ve seen on tv. She calls me over at something she had found while sifting through the dirt in the brook. Thinking that I’d be able to identify it for her I was stumped. it looks like it has characteristics of a fossil from what I think but with my limited knowledge and understanding I keep going back to the idea of “nah it can’t be” And thinking it’s just a cool rock. Either way the water seemed to do a number on this this find eroding it over the years. Also the finds in this brook are usually Cretaceous period specimens and the occasional dinosaur fossil is rare, and reptile fossils are a tiny bit rare too here I think. I have a couple pictures that I took that night when we returned home. I’ll take better lit pictures if these aren’t adequate enough, but the main question I have that’s been bothering me is; is it a rock or a fossil from something once living? Side note the front is slightly smoothed/curved and the back is mostly flat. Please and thank you to anyone willing to help. I’ve also taken the time since then to email 2 local universities for assistance too if that’s even possible.

Another piece from the rock canyon anticline. Both are approximately inch. I find many of these and didn't know if they are worth further investigation or even if they are identifiable, but I have seen amazing diagnosis and seemingly valueless things have scientific value. After seeing the amount of effort and the amount of scientific information continually being amassed I thought it would be worth asking.

So after hurricane Maria at Puerto Rico, I got curious about the small river down the mountain of my backyard so I went down to explore it. To my surprise some boulders tumbled down due to a soil erosion so I started exploring the scene. I found a few rocks that are actually some very peculiar fossils. The thing is that I don't know anything about fossils in PR so I'm going nuts trying to figure it out! Is it some kind of fish? But it's too big to be a fish and the bone-like structure is quite solid. Professionals and expert paleontologists, please help!

The only possible thing I can think of is that it could possibly be a day tooth. I’m sure it’s wrong so if anyone has any better ideas, go ahead and tell.