Hi everyone!
I have a large Otodus megalodon tooth measuring approximately 6.25 inches from the Philippines (it also has some wavy/ pinched serrations along the blade near the root).

I’m interested in determining where exactly this tooth would have been positioned in the shark’s mouth.

Specifically, I’d like to know:
Whether it came from the upper or lower jaw.
Whether it’s an anterior, lateral, or posterior tooth.
If possible, its approximate tooth position (e.g., A1, A2, L1, etc.).

Thanks in advance!

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

Found this leaf imprint fossil near Newport Beach in Oregon, wanted to determine what species of plant this might belong to. My initial thought was a chestnut tree, but I am not familiar with flora of the miocene epoch.

Found near Newport beach in Oregon. I suspect it may be a fish, but Id love to know what yalls opinions are on this, furthermore, if this is a fish what exactly am I looking at as far as the orientation of the specimen?

Colleague Found this on Lochranza beach on Isle of Arran.

I think its from a Great White but he thinks it might be a Mega tooth?

Its about a 7cm long.

As requested added more pictures.

Hi everyone!
I found this little, egg-shaped object near my home when I was in elementary school. I’m now in my 40s, and I’ve kept it all these years!
Ever since I found it, I’ve always thought it might be a fossilized bird egg, but I’ve never actually known what it is.
It’s roughly spherical, beige-gray in color, and has a rough, fine-grained surface with some dark spots and a few small holes or indentations.
I’ve attached photos from four different angles. I’d love to finally solve this little mystery after all these years!
Does anyone have any idea what it might be? Could it be a fossil, or is it just a naturally formed rock?
Unfortunately, I don’t have any more information about its origin beyond the fact that I found it near my home as a child.
Thanks in advance for any help!

I assume some sort of dendrastar?

Recovered in Wentzville, Missouri. The artifact is approx 6.5 lbs, 8 inches wide

I thought this was rebar until I realized that this rock isn’t a piece of concrete.

I found these in the waubonsee creek in Illinois, which I’m pretty sure is clay and limestone.
Pictures 4/5 Im not sure is a fossil, first glance I thought it was wood or bark. It is super light and porous but solid, sounds like rock if you tap it.
Also pretty interested in the last one which I assume is a vertebrae of sorts? It’s cool regardless.
Any help would be much appreciated!

Found in manatee county FL, in a spot I find a lot of shark teeth/ occasional mammoth teeth at. Curious what everyone thinks

Found with a mixture of rocks likely from the Compton formation and possibly Cotter formation. Possible Bivalve or something? Thank you in advance, I would just like to learn as much as possible about the formations, fossils, and minerals involved!

Not sure why this was removed from r/FossilPorn, but I guess I’ll show off here. Crystalized bivalve, entire rock covered in crystalized fossils. Meet findi though!

There's a bit of an argument in the comments on this one, I'm interested to see who is right. Personally the bone to me doesn't look fossilised, but I'm happy to be proven wrong. Thoughts?

https://www.facebook.com/reel/1160165966690229

Found in the south of the island of Brač in Croatia.
The non scaled side has tiny spirals on it.
It’s not really heavy.

Okay this isn't a fossil technically, just a Pinterest sketch but still.

I've been wanting to get this as a tattoo and the comments say that it's a smilodon's skull but, from the quick Google research I did, it doesn't look like it? The upper fangs seem too short and I couldn't find a skull on Google that had lower fangs. I have a hard time distinguishing skills but sabre tooth tigers look sick and cool 😭

I'm suspicious it's a mosasaur tooth tip because 1) we've found some mosa bones in the area and 2) we've found shark teeth with very similar erosion patterns. But I don't know enough about the flora/fauna to be positive. I've heard a lot about horn corals for example.

Colleague Found this on Lochranza beach on Isle of Arran.

I think its from a Great White but he thinks it might be a Mega tooth?

Its about a 7cm long.

Found alongside many graptolites, trilobites, an rare orthocones. My first thought is sponge? Could also be some weird regular mineral growth?

any ID help after the first slide would be appreciated!