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Just wanted to share results from tumbling this echinoid I previously posted, I was quite pleased with the outcome and think it's rather fascinating as you can see the individual tests and suture lines.

Feel like a duh moment maybe coming, I just realized at least some of my irregular echinoids are calcified. Is this common in Texas? Has anyone sliced one? I'm really curious what they look like naked and thinking of tumbling these ugly ones just to see. Are the structures I'm seeing in the calcite actually part of the echinoid or mineral inclusions?

Hello fossil forum, first time poster here. I found this rock in Tully, NY. It’s a small round stone with what appears to be a bit of brachiopod shell sticking out of it. My question comes from the fact that it’s an extremely tough rock - all of the exposed rock at the site was extremely flaky shale which barely held together when subjected to any force. I found this rock in situ and pulled it directly from the shale around it. My first guess is that it’s just calcified but I’d like to know if there’s anything more to this strange rock. Thank you!

Looking for ID help. This potential fossil was found on a dry lake bed in Southwest WI. In the same area this was found, I found other "classic" limestone Ordovician stromatolites exhibiting typical lateral columnar stratification in side view with convex tops and concave bottoms. This fossil has much the of the same structures but is partially "agatized". Could it be a stromatolite? All ID feedback will be appreciated.

During my organization and cleanup process in my never ending abyss of the fossil garage, I came across these gorgeous calcified fossils which are both cretaceous. I kind of misplaced them for a little while... I found them both at a sand pit in Coastal North Carolina a few years ago. So, show us your splendid, dandy and awesome calcified cretaceous fossils PLEASE! I shall start first on this cool lil' prospect to see what may be shared by other members. Libby First pic is a Flemingostrea subspatulata, Cretaceous oyster. Pee Dee Formation, North Carolina. Second pic is a Hardouinia kellumi, Cretaceous echinoid. Pee Dee Formation, North Carolina.

Another "rock" from my desert house. This one was covered in sediment, which I mostly chipped off. I think there may still be some skin on there as there is also some reptilian texture but much of it came off attached to the top layer of sediment (which I saved). Its solid mineral of some sort & very heavy for its size. It seems smashed in along the jaw on one side making it a little lopsided from all angles & I believe there was a longer mouth which is now thrown over the other side and wrapped the other side around a little. You can also clearly see some kind of vertebrae through the mineral running along the center of the bottom of the head/jaw as well as the top row of teeth along each side of the jaw. From the front you can see where some teeth got knocked inward. I can post more pics, angles, or details if you'd like but here's a start. This is the front/side. You can see the teeth knocked inward. This is underneath. You can see through the mineral and see the outline of a vertebrae down the center as well as where it attached near the back. Look closely and you can also see the top row of teeth as well as where they start where the jaw meets. This is the back of the head/skull This is the other side view. I believe that lump towards the front of the face is a mouth that got broken & wrapped around the side. This is head-on. You kind of have to tilt your head to the right to see it at the correct angle since it's been smashed to the side. I believe that dark spot towards the center was the opening for the nose and the thing twisting up and to the left along the bottom portion is the longer mouth that got broken & wrapped around. Or else . . . ? There are a lot of "rocks" like this in my yard but this one has the most detail so far. I also took photos of the bones & shell this week & will get them uploaded this weekend.

Hi all! Im a newbie but have always enjoyed the outdoors and collecting anything naturistic from feathers to artifacts. I do not have much knowledge of geology unfortunately. This was collected about 2.5 miles from my house in the foot hills of the appalachians. It is so humid here, that I would be surprised if much relating to fossils would survive for very long being exposed. None the less, I am curious as to what everyone's opinion of this neato looking rock is. It has this strange white coating on it...I took the best photos possible with the phone that I have.