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Sorry that the pictures aren't the clearest, they were the best I could get. I found this rock about 10 years ago on a beach in South Wales, and I was never able to figure out if it was a fossil or why it looks like it does. I would be interested to know what caused this. It has ridged spike-shaped marks on it, which are raised on one side (photo 2) and dip inwards on the other (photo 1). Thank you!

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

Here is an odd-ball I found yesterday. Recently I found a new marine / brackish layer of dark gray shale. My first discovery was two root pieces, which I'll showcase at another time. I also found a tiny Glabrocingulum grayvillense (gastropod) there. This particular rock had a brachiopod on it, and I was getting a closer look. The matrix was soft enough to stab with my tweezers, so I was digging around the margins. This very tiny piece appeared that looked very interesting, and even more complex under the microscope. It's very small. The further out photo shows it with a 1 cm scale. I feel like this is a known marine animal shape, but It's not apparent to me. You can see the opposite part of it on the top right of the following photo as well.

Can someone help me identify this fossil? Found at York River State Park in Williamsburg, Virginia, USA near the water. It seems that fossils here are likely from the early Pilocene. It's 7"x 4" as far as size. Thank you so much for any info you may have!

Hello! I see these spikes from Atlas mountains. I read about stegosaurus (Adratiklit boulahfa) in this formation. Could be a stegosaurus thagomizer? Thank you so much!

Are these Belamnite Spikes? Found at Lyme Regis. It is an early Jurassic area.

Made two trips to the creek while worrying about Dorian; one trip to the beach, but not much there (picked clean by Labor Day visitors? Only one olive shell and a few bleached, worn small teeth.) I pooled the stuff collected in trips from the same general area in the creek. One of the trips I used a slightly coarser screen, followed by a window screen in response to @MarcoSr excellent recent post "What are you missing????". Since my teeth are micro-sized to begin with, I was sure that there would be lots of new stuff to sort through. Unfortunately, I was disappointed in my initial characterization of the "fines". I cannot see well looking about in the creek, but am very near-sighted and think I can see most of what is there at home (but will retry with a different substrate spot; the spot I was digging was fine gravel and shell bits). I do see more smaller drum teeth. Some bone bits and a few angel shark teeth (may have damaged the roots on them as well with the double screening, always wondered if screening was why my cowshark teeth were often rootless?) No nurse shark or cookie-cutter shark teeth yet, but still intrigued. The two trips were mostly sand tiger teeth, mostly rootless or small root spikes. Some were glossy and nice but I'm guessing the gravel takes its toll. A couple of verts, a small piece of a bonito nose(?), a bunch of angel shark teeth (a few with broken triangular bases; I stood them up for the scan). A bunch of drum teeth (and small round rocks, not shown). One ugly worn cowshark tooth. One for sure small mako, and a few that I cannot see any serrations on (micro mako teeth?) More serrated triangular teeth than usual for me, mostly gray sharks, but one worn-on-the-tip hemipristis. Two tooth pieces, one relatively flat with what looks like hemi-serated edge of enamel, and one heavier, triangular edge with finer serrations that I think, hopefully, is a smallish megalodon. If so, this is the first meg that I have seen from the creek since a kid found a big one thirty years ago there (teeth were much more plentiful, but meg teeth were always rare there).

Found several, 25-30 of these yesterday. Seem more like spikes to me. Can anyone confirm if they are from an Ankylosaur?