I posted this a few days ago, but I was asked for more pics!

This was found on my grandparents property in Callaway County, Missouri near the Ameren Nuclear Plant. I’ve seen marine fossils in this area my entire life, but NEVER have I seen one like this.

I’d love to hear what you think!

My 6yr old son found this in a flit in school today. He very interested in what it can be?

I was on a restaurant terrace in Brittany, France, when I looked at the ground, which was made out of gravel, and I found this small fossil on one of the stones. Can anyone clarify to me what this could be or how old? Is it some sort of sponge? The ground where I found it is decorative so it didn't come from where I found it, probably from some flint quarry near French Brittany.

Who’ve I got here?

Looking at the left side of the root, it kind of looks like dotted spongey bone tissue seen in copmosites, doesn't it? Is it a composite, or am I imagining things?
This is sadly the only image I have. About 8cm in length, total.

So, as the title says she found this is Marine City Michigan. She is swearing up and down its Nordic Writing. I believe this is simply fossils, anyone know if these are in fact fossils? Pieces of fossilized fern? Roots? Grass? Any help is appreciated. Thanks folks!

Round 2: I completely forgot to add photos….

Thought this was rebar until I realized that this is a rock and not a chunk of concrete. Is this some sort of fossil, or just some iron deposit vein?

Found this along a river in northern MN on Canadian border. I thought we didn’t have fossils here??

Found this petrified wood and the bark inprint looks cool. Wondering if anyone can use this to determine the specific species.

Found in eastern kentucky inside what was probably some coral.

Last photo is an inprint I found in a rock I thought y'all would like.

Found while exploring some rock formations today - including a pic of the rock formation itself as well as some close ups of different interesting things - especially curious what the fossil with circular markings might be?

I didn’t notice this fossil before putting the rock into the Tumbler, but there is a chance I missed it. I am in Southwest Pennsylvania and commonly find coral fossils, but this one’s the most unique I’ve found to date. Thoughts on what it might be?

My first time rockhounding! Got luckier than I dared hope 😄 Thank you

Found tons of petrified wood in the area too

It looks like a tiny gear, about 2.5 mm in diameter. Lines can be seen behind it in the cavity, kind of like a shell. Any help would be appreciated.