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Found 132 results

  1. 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?
  2. Middle Devonian Trilobite

    This partial trilobite is from the Middle Devonian Thunder Bay Formation. Assuming it's either Pseudodechenella (P. reimanni) or Greenops (G. alpenensis) based on common taxa in faunal list. @piranha is there enough here to assign a genus? This has been eroded by wave action. Scale in mm.
  3. This rock was found in the shallow water off the South East shore of Lake Michigan about 20 years ago. No idea what it could be. Any help would be appreciated.
  4. I think this might be a sea lily?

    I picked this up off of the shoreline of Norwood, Michigan this summer. Initially I just thought it was a weird, pretty shell fossil. Until this morning, when I read the recent Atlas Obscura article about sea lily fossils (https://www.atlasobscura.com/articles/sea-lily-fossil-utah-evolutionary-mystery). The bit that caught my attention was that crinoid fossils often segment into little 'cheerio' shapes. I have SO many Norwood specimens with the distinctive cheerio on them (see the second image, left), and it got me thinking that the white frond shape might be a sea lily? Anyway, I'll be happy to learn whatever it might be, as it's definitely one of the weirdest things I've ever found on the beach. Thanks! Made In Michigan
  5. brachiopods Fossil

    Hi, another find this month. largest is 11 cm. appears to have more both front and back. limestone 2.3 cm x 2.3 cm x 0.80 cm or covers a U.S quarter. Found in West Michigan. Thanks, Bob
  6. Found a Big Tooth Maybe?

    Found in the northern lower peninsula of Michigan. It looks like some kind of bone. Maybe a tooth? Its pretty big any ideas?
  7. Hi, all, A friend over on the Facebook group "Great Lakes Rocks and Minerals" recently posted this little silicified pebble she found along the shore of Lake Michigan, northern lower peninsula. The tiny pores got several of us on the group curious about whether we could narrow down a possible ID. Someone initially suggested heliolitid, but I think we ruled that out because there doesn't seem to be enough room between corallites for coenenchyme. We decided it must be some species of small-celled favositid, but is it possible to narrow beyond that? (My gut says probably not, since we don't have thin sections or better views!) I was curious about Astrocerium (referred to as Favosites venustus in older descriptions). It's described from the Silurian (Niagaran) of Michigan, which seems to fit with this style of silicification. Also, I think I see what might be interpreted as spinules in some of the corallites, but maybe this is just an effect of silicification. Plus, I guess spinules are pretty common in favositid species, so it could be any number of small-celled species of Favosites or Emmonsia. If anyone has examples of Astrocerium from their collection, I would love to see photos! P.S. Hope it's okay to tag you two, @TqB and @FossilDAWG -- wasn't sure of other coral experts to ask, though I know they are around! Thanks much! Lisa
  8. is this a coral of some kind?

    Hello all! I was cleaning out my closet earlier today and came across this rock I’ve saved for about... 20 years now? I found it while digging around at my grandmother’s farm in south central Michigan (somewhere between Homer and Litchfield). I’ve always wondered what it could be... any ideas would be much appreciated! (Notice that many of the tiny holes go all the way through the rock. I just thought that was pretty neat, haha.)
  9. Unique crinoid stem fossil?

    I attended an estate sale last week and the homeowner collected rocks. Sifting through the 50-cent box, I came across this specimen. It's not a complete crinoid, but the size -- and the size variety -- of the stems was particularly enticing. I haven't a clue about where she may have collected it, but the coral, brachiopods and bryozoan fossils in the box look like those I've collected in Michigan.
  10. Please Help Identify!

    I found these rocks at Black River Harbor and Little Girl's Point in Michigan a few days ago. It's driving me crazy not knowing what they are! Any insights would be greatly appreciated!
  11. Michigan Fossil ID

    This was found at Millennium Park near Grand Rapids, MI. I'm thinking Bryozoan?...but does anyone have an idea of species?
  12. ID help, please! Lake Huron

    Hello - new here! My 5 year old son has taken an interest in “rock collecting”. We have a cabin on Drummond Island, Michigan - part of the Upper Peninsula of Michigan. We found this in the shallow water of a rock beach of Lake Huron. They look like bones in here to me, but I honestly haven’t a clue! I’m a history teacher, but one geology class in college hasn’t helped me much with this new adventure. I appreciate any thoughts! Thank you!
  13. Mitten hunting

    Hey everyone, so I've done quite a few trips to the Rockport quarry in Alpena and a few road cuts around presque isle, but I was wondering if there aren't any "hidden gems" I'm missing out on in the LP.
  14. Looking For Fossils In Michigan

    It has become a yearly tradition of mine to visit the upper part of Michigan's lower peninsula, around the Gaylord and Traverse Bay areas, for vacation with my family, and I often spend time looking for fossil in the area, mainly Hexagonaria/Petoskey stones, but for some reason they are far and few between. During my time in the area, I have also found a chunk of limestone containing what appears to be the glabella of a trilobite surrounded by what appears to be large, crystalized corals, possibly a Heliophyllum or similar rugose coral, a smaller piece of the same coral, and what seems to be the calyx and arms of a crinoid. Should I be looking anywhere in particular along the shores of Lake Michigan that aren't as well known as some of the popular tourist destinations? Also, are there any areas more inland that are accessible? (i.e. old quarries, roadcuts, etc.) Any and all advice would be greatly appreciated!
  15. A family member had this sitting next to their fireplace. I am generally clueless, but I'll try and give you as much information as I can. This was found partially buried in central Michigan in a field. There's a lake in the general area. Useful details: Generally bowling ball sized. About 35lb / 15kg, 12" (300mm) or so in the longer dimension. Concrete like feeling to it. It's non-ferrous. For all I know it was some junk leftover from someone pouring a sidewalk, that happened to take an interesting form. Can anyone point me in a good direction of what this is? Let me know if there's any more details that would help, and I can try to answer your question. Slightly bigger images in the imgur link I put below. https://imgur.com/a/SKTFon2
  16. Peninsula point

    Think about go camp near Peninsula Point and I'm little confused on where is that road cut located in one of Paleo Joe's video.... can anyone help me out? Thanks!
  17. I've recently become aware that there has been Pennsylvanian plant material found in the vicinity of Lansing, MI (Saginaw Formation I believe). All academic papers I've found on the subject are quite old, and I've read conflicting reports from here and other websites as to whether these localities are productive at all. Has anyone had experience hunting these areas?
  18. Halysites (?) specimen

    I found this pretty little chain coral in southwest Michigan glacial drift a couple of days ago. I'm interested in whether it's possible to narrow the ID down between a Halysites species or another genus, like Quepora. My simplistic understanding is that coenenchymal tubules would indicate a Halysites species, so that's what I've been focusing on, although I know there are many other indicators, like size and shape of corallites. size of ranks, shape of luminae, structure of longitudinal tabulae, etc. This piece is probably too silicified to tell without thin sections, anyway, but I thought I'd throw the pics up, in case there's a coral person here who can help me interpret any diagnostic features they see. (The tape measure I tried to hold up in the last photo is cm) Many thanks!
  19. In need of help identifying

    Hello there. I am quite a beginner to fossil hunting and would like some help on identifying one’s that I found today on the shore of Lake Michigan in New Buffalo, Michigan. I am aware that some could be rocks that I may have mistaken for fossils. Like I said, I’m new to this but would appreciate any of the help that I could get. Thank you.
  20. Is this a blastoid?

    I found this on partridge point in Alpena MI in Devonian limestone and have been finding crinoids and blastoids. I’m not sure what this is.
  21. After a bust season in Florida for the Peace River, it has been way too high. I am excited to be planning a trip back to Newberry, Mi. Two years ago when I was there, I was able to collect at a degrading hill side east of the town. There is a quarry of Collingwood Shale south of the town, but I was fortunate to find drift cobbles, and some Collingwood Shale on a friends property. Last time I found several nice impressions of Pseudogygites , mostly just the pygidium. I also found a couple of kinds of graptolites, and brought back a 4 inch thick, 16" long slab of shale with a nice orthoceras impression on the top. As i began salivating about my new trip, I returned to the shale and decided to split it, hoping I would not break the orthoceras impression on top. Well I am glad I did. It was such an interesting afternoon. One of the splits revealed just a fine grain layer of dark mud, with nothing in it. That was the middle split. Then I split each of those halves...in the have below the clean layer, I saw lots of little white dots...ranging from 1/32 of an inch to 1/16...Turns out they are braciapods. I captured a photo of one of the largest, and in it, the hinge even shows. Amazing. On the the half lying between my orthoceras impression on top of the clean grainy mud. Excitement. And drum roll please. I popped open what appears to be a small orthoceras, but perhaps it is a conularid, can't really tell. The exciting thing for me was the preservation. It has a nice decomposition blow ring of color around it, deriving from the decomposition gasses. I learned that from studying my Conasauga trilobites. And then it has some nice detail indicating structure. I was really excited. In the photo of the two halves, one looks larger because it is closer to the camera. On the other side, the top of this piece, my orthoceras was preserved, but a little chip from the side revealed a nice graptolite. A bit more might be revealed, but my previous experience with graptolites. precludes that...I don't plan to touch it. I found so many of them last time, I played around to see if they would be cleaned up....not the ones I have, they just break apart at the slightest touch. So overall, I feel like I am experiencing my trip once again, and I hope to be able to post new photos in June after I return. First photo is the little brachiopod (unknown type). Second photo is the Collingwood shale after splitting. Third photo is the two halves in same photo. Fourth photo is half A - fifth is half B
  22. Michigan rest stop

    Just beforehand my exit on the highway, I really needed to use the restroom, and pulled off at a rest area. This was quite lucky, since there was a very large piece of shale sitting in front. The whole thing was a giant hash plate. It was heavily weathered though and there were a bunch of fragments strewn around. I ended up finding quite a few nice pieces in the debris on the ground. Here's the rock and a closeup.
  23. Fossilized tooth?

    Hello fossil friends! I am very new to this world, my son and I started looking for geodes a few months ago and that has expanded into an amazing hobby, and a house full of rocks lol. I'm very intrigued with fossils/ bones but I don't know how to identify what we find! I'm pretty positive this is a tooth? Found in southwest Michigan, thanks in advance for any help!
  24. The big horn coral embedded in the rock is about 1.5 inches long, for scale. I really like the colors! Anyone have any idea what species it could be? Whenever I find em' I just call em' "horn corals", but if you ask me, they look more like barnacles or something (even if they're unrelated -__-) Good hunting!