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Hello and thank you for looking. I found this rock in a dry river bed in Nayarit state, Mexico, near an ancient petroglyph site next to the river. I always thought it looked like a little frog, but have not been able to figure out what it might be. I really appreciate your help. It's heavier than the common volcanic lava rock from the area.

This is being sold as a Pachycephalosaurus skull piece, the bumpy section of the skull rim that borders de Pachycephalosaurus dome. It's 65mm, no locality mentioned. I'm not an expert, but the structure and color doesn't look right to me. Opinions?

Hi everyone, For a week straight I have been searching what the heck a guys trace fossil on Facebook may be... He says he found it in Bradford on Avon west Wiltshire South West England. When I google search his images I keep getting trilobites, bivalves and brachiopods come up but it really doesn't look like any of these that I have seen anywhere. In over a week he hasn't received any suggestions other then hydnoceras but again it is nothing like any I can find and doesn't seem to be of the right time period. It's really starting to annoy the Aquarian in me! Whom can't stand unanswered questions! I have attached a pic of they only 2 things that I can find that resemble the imprint left in his what appears to be sandstone or similar rock... as I don't want to use his images without his permission, I did suggest this site much to the amusement and dislike of the Facebook page admin which is quiet sad considering he has had only that 1 reply of hydnoceras. With the shark fin I have added the "spines" to give you a general idea of the overall imprint as I said it is quiet unique and I have searched for a week straight to find anything even similar to what he has. The second photo is to a similar shape and pattern etc as the fossil in question is more concave than flat. In general it looks like a croc tail imprint with a fin/sail It is wider at 1 end and tappers to a tip and has approximately 11 dots horizontally and 15 spike impressions that join up to the dots the fossil itself is approximately 8cm long by possibly 6cm wide. I know this is a long shot but it's driving me crazy Kind Regards.. The annoying Aussie

Picked up a couple rocks from a river while hiking in Montana between Bozeman and Big Sky; each weigh about 1.5 pounds, and seem heavy for size which is about 5-6 inches in length. I think one is petrified wood with what I think is called a stone concretion on back. The other one I’m not sure, I thought it was cool and threw it in my luggage on my return to Indiana. I posted both rocks on social media and I started getting replies saying it could be an egg. Can anyone help me identify each rock?

Approximately the length of my pinky finger. Found amongst nothing other resembling it near banks of arkansas River. Any information would be greatly appreciated.

Hi everyone, I was walking today through the bush, and among all the extremely hard edged and flat rocks I saw this one. It honestly could be just a rock... but I couldn’t help but think it was out of place. Any thoughts on what this is?

I am just stumped on these. All came from banks of canal at the bottom of a hill. These are all on the shallow level side of canal amongst sandstone, and they are everywhere. On other side of canal a little further down it's grey clay with big red concretions and fossils shown but these aren't present. These whatever they are aren't very heavy but hard like limestone. Only found one with inclusion, and broke one open and it's smooth. Included pictures of both. They kinda stick to tongue.

Found in N central Ohio- it’s so oddly shaped and full of weird pieces. Maybe a conglomerate?? The bottom right area has a different, small dotted look. Could it consist of a fossil? Thanks for your help!

So I live near the Mazon creek and have found many fossils in my yard but this one has be puzzled. Most if not all of the iron nodules I have found have been smooth and oval or rounded in shape, This one has bumps all over it similar to some species of tree branches. it is long and round and heavy for it's size and the typical color of most of the iron nodules I have found and opened. But I have never seen a long one like this. Hopefully I got the size right on the photos, and I do have much higher resolution photos. Found lots of grass and ferns and a large piece of coral as well in the past. Along with lots of coal. The area where is live was once a very large strip mine area so the spoils were piled all over and if you dig you will find something almost every time. Edit to add about 6" long and 2" in diameter.

Hi there! First time poster, so I apologize if I'm lacking information. Also, my phone died on my way to the location, so I couldn't take pictures of the area I found them in. I tried to doodle a picture, but I'm no artist. Today I decided to check out a beach I had heard about near Port Angeles on the Olympic Peninsula of Washington State. . On this beach, there is a section of mudstone/sandstone about 60 feet tall and 100 feet long. At the base of the slope was a boulder(also sanstone/mudstone) about 6 feet tall and 4-5 feet around. It must've recently fallen because it was crumbling more and more just from looking at it. Right in the middle of the clump there was some sort of long, lumpy fossil(thought it was, sounds like it's not ;)). I have no idea what it could be. I've googled "lumpy dinosaurs", "lumpy whale vertebrae", and a few more embarrassing amature terms, all to no avail. If anyone could help me identify these, I would be EXTREMELY grateful! I've definitely caught the fossil/rock hunting bug and am really excited about finding these. If any other pictures/measurements would be helpful, just let me know. The largest piece is about the size of a volleyball. Edit** forgot to add, it was found in either lower tertiary sediment, or quaternary sediments. Sort of on the border of the two according to my map Edit #2** Just did a little more researching on the area, and it is part of the Twin River Formation. "Upper member, massive to thin-bedded mudstone and siltstone. Olive gray to greenish gray mudstone, claystone, and siltstone are poorly indurated and contain thin beds of calcareous claystone and a few thin to very thick beds of massive calcareous sandstone. Spherical, cylindrical, or irregular shaped calcareous concretions common"

Hello: I cannot remember where I found this, but I am stumped to as what this might be. I am guessing coprolite, but that's just a guess? Any help is always appreciated.