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Found 156 results

  1. Is This a Nautiloid Cephalopod?

    Hi everyone. The other day I found this interesting impression in a rock. When I first saw it, I noticed that it looked similar to the sutures inside a cephalopod shell, but I thought it may have been wishful thinking and was probably something else. I took it home and asked on Reddit, and another user also said that they believed it was probably a nautiloid shell. So, I'm coming here for final verification. Is this a nautiloid shell? The fossil was found in northwest Michigan, along Lake Michigan. Thanks in advance!
  2. I need help with a scale like fossil!

    Hello! I recently went to Grand Ledge, Michigan. This area is part of the Carboniferous, and more specifically the Pennsylvanian period. I found this fossil that appears to be scales. It’s not an imprint either, the scales are elevated. In the surrounding rock there are cordiate fossils and some kind of clam, I found ferns in the area as well. I believe that it was a swamp land way back when these were all alive. An ID on what kind of plant or maybe even fish scales would be awesome! Thank you!
  3. Coral ID from Michigan needed

    I found these pieces over past year and half and have just gotten around to IDing them. I can’t find anything on the internet or my book on what these are. They are from the Mississippian as I’m from west Michigan. It seems they attach to things as oneI found on a horn coral. One in the picture seems to have shell on the bottom as well. An ID would be awesome because these have been a headache for me! Thank you!
  4. This weekend, I have to drive up to Michigan to finish moving out of my apartment since I graduated, so I thought I would hit up a couple spots along the way. I'll hopefully have plenty of pictures to post here, but my fossil-filled week began earlier than expected so I'll start with that. I couldn't sleep much yesterday and ended up getting up way too early, so I figured I would go check out a Middle Devonian spot (Milwaukee Formation) in SE Wisconsin. I think this spot is pretty well known, so I wasn't expecting to find much. The fauna is pretty similar to what I find in the Silica Shale in Ohio but not as well preserved, so I didn't collect that much as I will be hunting the Silica Shale this weekend. The location is quite scenic, and I spent a lot of my time hiking the trails. Along the trails are a few outcrops, including one that appeared to only have been recently exposed from a tree falling. Unfortunately, most were poorly fossiliferous at best. It seemed like a lot of fossils were concentrated in what are perhaps storm deposits, but these were in the middle of massive dolomite beds and were not worth the effort. I only found one outcrop that was really worth exploring. I think only surface collecting is allowed, not that I would want to bust out a sledge next to hikers and fishermen anyways. The best collecting seemed to be from the more fossiliferous Lindwurm member. The underlying Berthelet is much more thickly bedded and formed a natural ledge for the Lindwurm to collapse onto.
  5. Trilobite?

    Found near Escabana, Michigan... is it isoleus fragment?
  6. Mackinac Island Fossil

    Hi there everyone, I found this piece a couple of years ago in Mackinac Island, Michigan and just realized I do not actually know for sure what it is. Thanks for helping to I.D.
  7. Unknown Coral

    Found in SE Michigan, but likely moved there by man as it was in my mothers new condo flower garden. Approximately the size of a grapefruit. Spheroid with a mushroom shape with the bottom "stem" area not having any of the corallite tubes. Originally thought it was a Petoskey stone, but after cleaning it up (hosing the mud off it) I cannot see any separation between the tubes, and I have never seen a Petoskey with such far separation of the openings and without a very clear hex shape. Matter of fact, I cannot see any joint between the openings at all. The other types of corals from the area I am familiar with (horn, Charlevoix, and chain corals) it is clearly not one of them. Any help at an ID would be appreciated. Will try to post a couple other pic's below, hit the size limit with this post.
  8. What kind of cephalopod is this?

    So I found both of these specimens a while back and just assumed it was some sort of cephalopod, but I’m not sure what kind. They were both found in the same area in west Michigan. Any information on these would be really helpful, thank you!
  9. Any information on conulariids?

    Hello everyone! I’m looking for any information on conulariids while showing the one I found! I found this specimen in west Michigan while fossil hunting recently. I used my microscope to get very zoomed in details of the ridges as this conulariid is very well preserved. The two very close up pictures are a 1000X while the last picture that isn’t as zoomed in is 50X, both are the same spot of the specimen. I know that these are thought to be some type of jellyfish/coral but that’s all I know of these fossils. Any more information would be really awesome, and I hope that you enjoy this find!
  10. Hello fossil experts! I have a background in geosciences but know little about fossils. I found the below fossils along the waterline of the Rouge River, a few miles north of Detroit (Michigan). Doing some research, I think these are from the Mucrospirifer order, probably of the Thedfordensis species. Do you agree? (longest is about 1.5 inch / 4 cm) The thing I'm most puzzled about is from what strata and geologic era they are from. The interweb tells me these Mucrospirifer in Michigan are mostly from the Middle Devonian (Antrim shale, Traverse Group), while the location where I found these (as well as all of the upstream terrain) has younger bedrock, from the early Carboniferous/Mississippian (Coldwater Shale). This Coldwater Shale is a pretty thick deposit so a river/glacier can not puncture it easily. I used the Bedrock Geology map from www.esrs.wmich.edu/mgs/webmgs/migis.html Any thoughts on this? Are these Mucrospirifer from the Middle Devonian or from the early Carboniferous/Mississippian? Thank you, Jasper
  11. Hello fossil experts! I have a background in geosciences but know very little about fossils. I found the below fossils along the Rouge River near Detroit (Michigan). Doing some quick research, I think these are from the Mucrospirifer order, probably of the Thedfordensis species. Do you agree? (longest is about 1.5 inch / 4 cm) The thing I'm most puzzled about is from what strata they are from. The interweb tells me these Mucrospirifer here are mostly from the Middle Devonian (Antrim shale, Traverse Group), while the location where I found these (as well as all of the upstream terrain) has younger bedrock, from the early Carboniferous/Mississippian (Coldwater Shale). This Coldwater Shale is a pretty thick deposit so a river/glacier can not puncture it easily. I used the Bedrock Geology map from www.esrs.wmich.edu/mgs/webmgs/migis.html Thank you very much for your insight! Jazz
  12. Why is this red

    I found this fossil in Ossineke Michigan in a field and I’m curious to know what it is and why it is red. It seems kind of like incomplete horn coral but the red color and texture of the red part is strange. Most of the fossils in our area are Devonian.
  13. Unknown Michigan Fossil - Coral??

    Hello everyone, back again with another request for fossil ID. I found this rock on a small rocky beach in western Michigan, the same location I find a lot of my fossils in. At first glance I thought it may have been a Petoskey stone (Hexagonaria percarinata), but upon closer examination it doesn't really look anything like one. In fact, it doesn't really even look like a coral to me, though I could be wrong. That is my only guess, so it might actually be one. I'm also curious as to the reddish bands that are visible on the side of the rock. If anyone could shed some light, it'd be greatly appreciated. Thanks!
  14. Any ideas?

    Picked up this stone a few years back while visiting the area north of Traverse City on Lake Michigan. Lots of Petosky stones on this beach, but this really looked unusual. I’ve had some time to look at it while at home lately and wondered if anyone had any ideas? So curious because of the triangular shapes and line patterns.
  15. Brachiopod ID, + Bryozoan?

    Hello all. I'm an amateur fossil hunter, so this might not seem that exciting, but I was really happy to find these four rocks with what I assume are brachiopods in them. These were found on a small, rocky beach in western Michigan (so rocky that most people would probably prefer not to swim). The specimens vary in size quite a bit, with the largest one being about 2 cm (this one is also one of the most well-preserved). In one of the rocks I see some lacy-looking material which I believe is probably a bryozoan frond, but I'm not too sure, so if anyone could confirm that too, I'd appreciate it. In the last few pictures, I wet a couple of the specimens themselves to hopefully make them easier to see. I hope these pics are good enough. If anyone could give me info on what exactly these little guys are, it would be greatly appreciated. Thanks!
  16. Maybe fossil

    I recently dug this rock out of a pile I have next to my house near Grand Rapids MI. I know I put it there many years ago but I can't be sure it originated from this area. There are a lot of things I don't know about this thing. I posted it on a rock forum and showed it to some rock hound friends and they all seem mystified. Some of them suggested that it could be a fossil. Maybe a type of sponge? That could have been a wild guess but I'm hoping someone here can confirm or deny that for me. It seems to be all quartz of one sort or another but the interesting thing is that it seems to be made up of pieces like a conglomerate but with almost no material between them. It reminds me of monkey bread, if you know what that is. Also, a lot of the pieces are solid on the outside but porous and sort of grainy on the inside. Enough rambling! Please let me know what you think. And let me know if you need any more photos or other information. Thanks!
  17. Maybe a coral or something else?

    I picked these up on my last fossil hunt. They were found in west Michigan too. I’ve never found something like those before and thought they might be some kind of coral but I don’t what from. I can’t find anything that looks like it either so any help would be great!
  18. Mammoth Tooth? Horn Coral? Something Else?

    Hello all. This is my first post. Today I was fossil hunting on a small beach area off the side of a road, where there are a TON of rocks. I found quite a few great finds, and this one was my largest. I'm not an expert by any means, and at first I thought this was some kind of horn coral. I posted a photo on Reddit, and one person thought it may have been a trilobite. I didn't think this was very likely, but now that it's been brought up I can kind of see it. The other suggestion was a woolly mammoth tooth (Mammuthus primigenius). This fossil was found on a small beach in western Michigan. I included a photo of the back of the rock since it was suggested to get it from all angles, though there was nothing special on the back so that's why one of the photos just looks like a normal old rock. If anyone can confirm any of my three answers, or give another option entirely, it would be greatly appreciated. Thanks!
  19. Found this stone awhile back, very smooth and round, and perfectly shaped like an egg! I live in the Thumb of Michigan, and found this in the rocks by some shrubs. All the other rocks were definitely not like this. Any ideas what it actually could be?
  20. I found this in a gravelly area where I usually find a lot of crinoids and shells and coral. I also find many goniatites in this area as well. It’s in West Michigan near Holland. I’ve never seen anything like it before though and I’m having trouble figuring out what it’s even from.
  21. New to fossil hunting, no idea what these are!

    Hi everyone! I am brand new to fossil hunting and have two new fossils that I found today. I know pretty much nothing about them and I’m hoping someone can tell me what they are! They were found on the beach at Lighthouse Park in Port Huron, at Lake Huron/the mouth of the St. Clair River. I’m a little more interested in Fossil #1 (I labeled them in the photos), so there are a few extra photos of that one. Any info at all would be greatly appreciated, I am dying of curiosity!
  22. Escanaba man ‘digs’ fossils Deborah Prescott, Daily Press, Escanaba, MI https://www.dailypress.net/news/local-news/2020/03/escanaba-man-digs-fossils/ Yours, Paul H.
  23. Horn coral +

    This horn coral is most likely from the fossil area of Alpena, Michigan per the man that gave it to me. It was covered with very hard dirt. After much cleaning and trips to the ultra sonic machine I am not sure what I'm seeing? The top instead of the usual straight cut like lines has lumps. like the tentacles. And instead of the usual looks of a broken off tail it has the gray as pictured. Is it the normal looks of a well preserved horn coral or another life form attached to it. I understand that they secrete calcium carbonate around them for protection, and that is what we normally find. all images with my cell phone, unedited. Thanks, Bob
  24. Possible Haxagonaria

    The rock on the right is a Petoskey stone but the rock on the left I am uncertain about. I found it in Alcona County, Michigan and it might be some sort of large celled Hexagonaria but I’m not sure. If anyone could help me identify it that would be great.
  25. Is this Michigan rock a fossil

    I found this rock in Lake Michigan near traverse city. It looked curious, is it a fossil? Glacial scarring? What made the bands?
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