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  1. ClearLake

    Pleistocene Rock Marine Imprint

    On a recent visit to Key West, Florida I found this imprint in a rock along the shore. This was a piece of rip rap, so its original location is unknown but I believe most of the fill and rubble in the area was sourced fairly locally (South Florida). The bedrock at this location is the Pleistocene aged Miami Limestone, which is from the Wisconsinan to Sangamonian stages (<700,000 years) but even in all of southernmost Florida (say Miami and south) the oldest you get is Pliocene. So, while I don't know the exact age, I'm pretty confidant it is fairly young. The imprint is about 5cm wide by 9 cm long. Hard to tell in the picture perhaps, but it is probably 3-4 cm deep. In the picture on the left, you see the whole rock, including the other bivalve casts etc in there. Looks pretty typical for what I saw in the limestones of that area. The picture on the right is the impression enlarged. I did not bring it home with me, so this is the best I can do with pictures. My first impression was it looked like the impression of an ammonite septal wall, but of course it is much to young for that. Only other thing I can think of is the impression of the top of some type of coral, maybe a brain coral, but I'm struggling to visualize it as it looks too symmetrical for that. The detail is pretty neat. Anyone recognize this? @digit @hemipristis @Harry Pristis
  2. fold8

    Is this a fossil?

    Got this at a estate sale in a box of gemstones and fossils. It's the only one I haven't ID'd. Any help would be great thanks
  3. tekknoir

    Coral? Sponge?

    Hi all, Was wondering if anyone has any ideas on this one. I'm thinking maybe some kind of coral or sponge, but I'm not sure. Found in Truth or Consequences, NM. There are quite a few Pennsylvanian marine fossils in the area. It's pretty heavily mineralized, but if you look carefully at the photo with the scale, there are two dark strands running across the center that are segmented. Thanks for any input!
  4. Brandy Cole

    Texas Coral? Favosites?

    Ocean related fossils are something I'm relatively unfamiliar with, but I noticed this landscaping rock from Central Texas over the holidays that caught my eye. It didn't look to be the right material or texture for petrified wood. It reminded me of some of the coral pictures I've seen here. The rock was pulled from an area around the Hooper Formation I believe. The Wilcox Group. The rock is about two feet long by one foot wide. Could it be favosites?
  5. rockandbone

    Found in Central Florida Backyard

    We live in a part of Florida that is known to be the only very “hilly” part of the entire state. Which leads me to believe many years ago water filled these natural curves in the land. I often forage for animal bones of animals that have died of natural causes recently, and collect pretty rocks as a hobby. This one threw me for a loop.. bone like color and smoothness.. very circular holes as if something once occupied them.. but a rocky structure underneath. I was hoping for anyone to help me ID what this might be, whether that be a cast, a fossil, or a really neat rock. Was afraid to clean it up because I’m not sure of the ID yet. Thanks for all your help!
  6. Mosasaurhunter

    Is this a coral?

    Hello, I found this on a dirt road next to an exposure of a late Cretaceous deposit and I thought it looked like some kind of branching coral of some type but I’m not sure any help would be appreciated, thanks.
  7. Maria C

    Lake Michigan Fossil

    At first glance, on the beach, I thought this was a pink Petoskey stone / Hexagonaria, but there are no visible bands or gills. Any thoughts?
  8. Found in Nevada. Reno area. Not too sure what it is. First time ever looking for cool rocks and fossils. Thanks for any info :)
  9. brookearchaeo

    Fossil I found at work, possibly coral?

    Hi, found this fossil at work the other day (sometimes as archaeologists we are on sites and that have fossils lying around in the geology, I always like those ones). It was found in north-east Leicestershire (UK). The geological maps say the bedrock geology there is 'blue lias formation', but the 'superficial geology' is something called the 'Oadby Member' (BGS Lexicon of Named Rock Units - Result Details) (which I suspect this might be from I think) formed in the quaternary but has Jurassic and cretaceous fossils churned up in it. From colleagues I have heard suggestions it might be a tree branch or coral, personally it looks to me a little more like coral. It's pretty big and potentially quite a diagnostic piece so perhaps this could even be narrowed down further? I don't know though I am certainly no expert. The sort of 'pockmarked' features on the narrow sides (I figure the wider sides have just had these eroded away?) are what makes me think this is a fossil at all, it also curiously seems to have a hole going through the middle of it, I do not know if this actually goes all the way through as it is packed with mud and I do not have a good implement to get it out, but I suspect so.
  10. LilExplorer

    Please help identify Ontario, Canada

    Good morning Any information pertaining to this would be appreciated. It was found along Lake Erie in Ontario, Canada. I believe it may be coral but not 100% sure. Thank you
  11. mano niho

    Is this a shark tooth?

    Hello All, New to forum. Could you please help me ID this. Is it a shark tooth? Thank you Mano
  12. Chequah

    Latest Confusing Find

    Found this today, while on a weekend hunt. Discovered in Hopkins County, edging an old coal mine. I've never seen anything like it before.
  13. 3RZUL13

    What’s this?

    Pulled this from roughly 3-4 feet deep in my backyard on the far west/nw edge of San Antonio. Found a rock bed as I was digging. Odd because until then the soil was actually soil…it was dark and was easy to shovel. I’ve dug holes all around my property and at many other spots around this area and I’ve always hit a very solid layer of limestone before even getting a foot deep. So 3 feet was noteworthy. And that was about 8 months ago. It took me that amount of time to uncover this one. It’s a hair shy of 2lbs4oz/ just over 1kg. Any thoughts on it?
  14. Fossilsupremacy

    I think i found a sponge or coral?

    New to this platform and web forums in general (other than discord). But uh- i was at Lake Ray Roberts beach yesterday and found this strangely shaped rock in the water that i think might be a sponge or coral due to the abnormal tiny holes in it. I’m no paleontologist but i know that the area used to be underwater, so it would make sense. If anyone can identify these photos, it would be a huge favor (and if you have discord i might draw your fav dino as a reward-) (btw, the fossil’s about 3/4ths the size of my hand, and i’m 5’11.)
  15. kipper327

    Niobrara Chalk Finds

    Found these three rocks in an outcropping of Niobrara Chalk in Southeast SD. I suspect they are sponges or coral of some kind. Pics 2&3 are both roughly the diameter of a penny, pic 1 is probably 20% larger. ID would be greatly appreciated!
  16. kipper327

    Niobrara Chalk Sponges?

    Found these five mysteries in an outcropping of Niobrara chalk in southeast SD. I think they resemble sponges or coral, though I'm well aware that they may not be. The four sand-colored ones are all roughly the diameter of a penny, though the first pic is a little larger. The red-stained one is about the diameter of a nickel. Thanks in advance!
  17. Coela Cant

    Want fossil IDs from jax beach

    I originally thought the last slide was pieces of coral but couldn’t find similar images. I think the first picture is some kind of tooth on the left and then maybe just a ray plate embedded in rock on the right. Thanks for any help!
  18. What kind of coral is this? I'm not an expert, but just love to explore and found this beautiful thing. I tried to google it but found no match. Any help would be appreciated, thank you!
  19. ChrisSarahRox

    Need help to identify

    Location found was Grant NM on the edge of the boundary to Gila National Forest. Hope this helps in it's identification. Thank you. It's dimensions are approximately 8cm x 4cm x 3cm
  20. ydok

    ID Assistance

    Hi! Just wanting to see if I can get any IDs on my recent finds from Lake Michigan. Thanks for any help. 1. 2. 3. 4. 5. 6. 7.
  21. Like the title says, I collected this when I was a kid in Woodstock Ontario. Not sure what I'm looking at exactly. I'm thinking the bigger thing is horn coral of some kind?
  22. Fossil finder 100

    Fossil/mineral ID

    Sorry I’ve been posting a lot but it’s been so exciting finally being able to identify some of my mystery fossils! I got this out of a box of random minerals and fossils at the last chance mine in Creed Colorado but I think they might have been brought from somewhere else but don’t know for sure. My first thought was coral but don’t really know. Thanks ahead of time!
  23. ottawafossil

    saskatchwean corals? 2/3

    2/3 found these on shore of Lake Diefenbaker in Saskatchewan, Canada. looked to be eroded from sandy deposits with layers of harder iron-rich rusty strata. the fossils themselves are heavy, mineralized with iron and then rusted? corals? all the same type or different? i think this is in cretaceous age but not sure. see other 2 posts these specimens are larger, very heavy. like solid iron, looks like outer textured surface mineralized and inner cavity separate - looks like central tubular structure did not mineralized (still sandy) in one pic (could scrape out with toothpick)
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