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  1. WiscoChick

    Stromatoporoid or Stromatolite?

    Need help confirming what I found. This speciman was found in Milwaukee, WI. I found it in some loose landscape rock around the building I work in. Unfortunately I don't have a ruler on me right now but it's about 2 inches long and 3/4 inches wide. Originally I thought it was agate but someone in my rock group on Facebook says it looks to be silicified stromatoporoid. After doing a Google search I came across stromatolites also. So I'm not sure which one it could be. It's a beautiful specimen. What looks to be quartz on the bottom and what I originally thought was agate surrounding it. Any ideas of what this could be? Thanks a ton! (Sorry about holding the speciman. These pics were taken when I found it and I have the specimen at home and not on me right now. I tried to crop out my fingers) Pics: side view, end view and top view
  2. JWfossils123

    Wisconsin Trilobites?

    Hey all! I'm new to this site, but I've been interested in fossils all my life. I kind of joined this forum on a whim since I've been doing a lot of internet surfing recently. I'm on a quest of sorts to try and find any trilobite remains in my state, (I live in Green Bay, WI) but I'm not having much luck. I've been all over the internet looking for any known collecting sites in Wisconsin. I'm well aware of places like Fossil Park in Sylvania, Ohio, and I'd absolutely love to have a chance to visit Penn-Dixie in northwest New York, but I don't really have the time, so I've been trying to find somewhere in Wisconsin that I can drive out to for a day or two. However, I haven't had much success. I've heard of some more well-known sites, but I can't really figure out if any of them are open to collecting of any kind, and I'd rather know beforehand. I've used this website (Click here) to try and narrow my search, but I can't really find much info on any of these places or what kind of fossils they may have. One of the most promising leads I currently have is Olde Stone Quarry in Door County. It's an old limestone quarry, but I'd still like to know if there's somewhere more promising for looking for trilos. Any opinions? (Summary): Anybody know of any specific places in Wisconsin where one can search for trilobites? I can't find much info on collecting. Any leads are appreciated
  3. Registration has opened from the 7th International Conference on Trilobites & Their Relatives in Cincinnati, Ohio. This is a four day conference (including a mid-conference field trip), plus pre- and post-conference field trips. The pre-conference field trip is to the Upper Cambrian of Wisconsin, and the post-conference field trip is to the Ordovician-Devonian of New York. The latter looks like it will visit some very enticing spots (unfortunately it is quite expensive!). The mid-conference field trip will visit several classic Cincinnatian sites, including possibly the famous Mt. Orab Trilobite Farm. I registered for the conference and hopefully can spend a few extra days collecting the Cincinnatian. Hopefully I'll see some of you there! https://www.cincymuseum.org/7th-international-conference-on-trilobites-and-their-relatives/
  4. Bill Hoddson

    Lycopod From Wisconsin?

    Posting this for someone on Facebook - found near the Mississippi River, SW Wisconsin. Lycopod root?
  5. Hello! I have been lurking on this Forum for a while because I was very busy lately and still is! I found few fossils and I thought it might be trilobits- pieces of trilobite and also something else that I thought it seems 'fishy' and somewhat resemble a fish spine. These fossils are not found in situ but the bedrocks are Silurian. If they are trilobites, it would be my first time found one! I found this on the beach of Lake Erie, just east of Toledo, Ohio two weeks ago. Approximately half centimeter. Yesterday, I found this fossil on the beach of Lake Michigan in Kenosha, Wisconsin - just north of Illinois state line. It looks like a cross section of a trilobite to me. Approximately a centimeter and half wide. Unknown and resembles a fish spine, approximately two centimeters long. Thank you in advance and I am looking forward to seeing the responses!
  6. lulufresh

    Wisconsin amber?

    I recently found a piece of petrified wood that has amber bubbling on the top and embedded into the piece. I found it in a region where people have told me there is no petrified wood. I know that it is. I have seen quite a few pieces of petrified wood from Arkansas and a few with amber embedded. This was found in Wisconsin in the Mississippi river valley. Any thoughts?
  7. danu

    fossil ID (WI)

    Hey all! I took my little brother out fossil hunting on the lakeshore, I myself am no expert but it's been a lot of fun- we found a number of crinoid and brachiopod fossils and some cool rocks besides. Theres a couple that stumped us though, I've been googling references but nothing looks similar to me. It looked to me like some kind of coral, the second one might just be a rock with some holes in it, but they appear in a fairly regular pattern that intrigued me. Any input is appreciated!
  8. Upnorth

    Any ideas what this could be?

    Found this near a lake in polk county Wisconsin. There seems to be a somewhat unusual pattern on it. Can anybody identify this? I can get more photos and dimensions if needed. Thanks a bunch!
  9. Hello everyone! I recently purchased two fossils, they were both sold to me as Ordovician the crinoid being from Wisconsin and the brachiopod from Illinois. @connorp has told me in a different thread that the dolomites of the region also preserve Silurian fossils and that these look much more like that. Doing a quick Google search I did find something that looks very similar to the crinoid I have, but I don't know enough about these animals or the area they come from to be certain of the ID. Here is the crinoid in question: To me this calyx looked quite similar to that of siphonocrinus both in the gener shape and the plates covering it's surface. Here are some pictures I found online with the region that looked especially similar circled in red: Along with it I also bought this Pentamerid brachiopod which could very likely also be Silurian. Could it belong to the genus Pentamerus?
  10. GML

    Help ID'ing "tooth"

    I am new to this forum and have very little knowledge of fossils. I would like to know if this rock that I found several years ago in northwest Wisconsin is a fossil or just an interesting rock. Thank you.
  11. SG5707

    Wisconsin Fossil

    A while back I found this fossil in Wisconsin, unfortunately I don't remember where exactly I was when I found it. So far I have been unable to easily identify it. It is about 2 inches across, and about an inch tall. I can post more pictures if needed.
  12. Crankyjob21

    Some really cool fossils from my land!

    My collection of some really cool fossils on the land most of the fossils I have in my collection are bought so it’s always nice to find something actually in the field. Now my main goal with this post is to try to identify the trilobite I found today although it only has the head piece, it clearly shows the eye and part of the gabella. The horn coral which are the sort of conical fossils should help identify the age of the rocks. if anyone else can give an ID on the rest of the fossils that would help thanks. By the way these were all found in Dane County, Wisconsin. (PS) I have no clue what the fossil is with the weird holes.
  13. Hello, I had some time to look at a few more of the rocks from my collection trip into Wisconsin Platteville Grant County 1,2,3 First is a flat creek rock I gave a scrub and I think it has a trilobite cephalon. 4,5,Is a rock that appears to have a trilobites or it coiled be a broken bivalve? It's in a flakey rock so I haven't picked at it much. I included a side picture of the sediments. 6,7 I am pretty sure these are Chondrites? Or something similar? There are also some other bits in it 8 is a bit of hash plate but it has what I assume must be pyrite bits that are a bit flashy golden - hard to see in the pic but there ar little bit popping out and reflective - I figured I before I show my daughter I figured I should confirm they are pyrite or something similar - and not what she will immediately think it is! Thanks and I hope you all have a wonderful weekend! I'll keep sorting and seeing what I got and maybe walk a creek or two for fun
  14. Crankyjob21

    Lake Michigan fossils ID

    Found all of these beautiful fossils on Lake Michigan, specifically Pleasant Prairie, Wisconsin on Prairie Shores Beach. Would not mind if anyone could give me an ID
  15. Hello! After losing 2020, and then winter, I was finally able to get out and look around in my new area, NE Iowa and near Grant County, Wisconsin. I walked down a few rivers in the Ordovician areas, Platteville Formation, Grant County, and picked up what I think might be a Trilobite? Based on the Various publications of the region, it may be Sceptaspis lincolnensi, but this is really my first Trilobite I have found (in many years of walking along looking at rocks) I haven't cleaned off any of the matrix, just a nice scrub. I also found this hash plate nearby, I liked the Gastropod? In the center and noticed and when I looked it may have a similar trilobite? Thanks, appreciate your help!
  16. With the nicer weather last week, I was able to make two brief trips to kick of the year. There still ended up being a lot of snow on the ground, but it was manageable. My first trip was to one of my favorite sites, a roadcut in the Pennsylvanian LaSalle Limestone in Illinois. Lots of the usual stuff was found, but the two trip makers were a small Peripristis shark tooth and a Linoproductus mass mortality plate. Here's the tooth. I think it will clean up nicely. And here are the Linoproductus. There's around 50 individuals present, and they are all quite small compared to most Linoproductus specimens I find at this site. This is probably the best brach plate I've found here. Here's a random shot I took of the headwall. Most of the common brachiopod species at this site are visible. A few days later I had a couple hours free in the morning and checked out some new Ordovician spots in southern Wisconsin. Here's a neat roadcut I drove past, showing the contact between the Ancell and Sinnipee Groups. The lower unit is the St. Peter Sandstone and the upper unit is the Pecatonica Member of the Platteville Formation. The Glenwood Shale is the narrow shale unit between the two. The site I ended up hunting was in the Grand Detour Member of the Platteville. In this area it's mostly dolomite, and most fossils are internal molds. The preservation is thus not great, but splitting rock can yield nice mollusks on occasion. Here's a typical example of the molluscan hash. This large Ctenodonta was a nice treat. It's about 6cm at the widest dimension. The trip maker was a coiled nautiloid, the first I've found. I am not sure on the ID. It measures about 2cm in diameter.
  17. Crankyjob21

    Wisconsin Brachiopod fossils?

    Hi I broke open a rock in southwest Wisconsin, and I found this collection of brachiopods. Can anyone try to tell me what genus they are? Each of them are around 2 cm long.
  18. BeforeDinosaurs

    Getting Started In Southeast Wisconsin

    I'm excited to get into fossil collecting, but before I spend money on gear, I'd like to be able to make an informed decision. The fossils I'd be collecting are from the Silurian age Racine Dolomite. I know that Estwing tools are generally considered the best, but other than that, I am completely unsure as to which hammers and chisels would be most appropriate for breaking these apparently very hard rocks, or even how to go about using them. I know a spot on a friend's property (by the Milwaukee River) where there are a bunch of Silurian rocks piled up, so I don't think access will be a huge problem. Still, info about good sites would be welcome. Thanks.
  19. citrine.colubrid

    Fragment of something

    I spotted this thing in a hash plate and I'm wondering what it could be. I'm assuming it's a fragment of something like everything else it is jumbled with, but I don't really recognize it as anything. Found in SW Wisconsin in the platteville formation.
  20. citrine.colubrid

    Fossil Algae?

    I've got this big hash plate that I collected last year and I somehow didn't notice this thing poking out until now. It looks like an algae to me. Found in SW Wisconsin in the platteville formation.
  21. Jim K

    Brachiopod

    Last week we took a ride to Lake Michigan to do a short search before the weather turned bad. The previous day had strong winds with large waves and I thought we might find some interesting things. We found plenty of Favosites, Halysites, and Rugose corrals as well as some of the other usual finds. The one unusual find was what I believe to be an internal mold of a Pentamerus oblongus brachiopod. I don't find many brachiopods and as such I'm not 100% sure on my ID. Please confirm or correct. Thanks in advance. Jim
  22. I graduated college back in May, and since my graduate program did not start until September, I was fortunate to have quite a bit of time this summer to explore further away from home. I've been slowly prepping and cataloging over the past couple months, and figured I would share some of my favorite finds that I haven't shared yet. First up is dump piles of Silica Shale (Middle Devonian) in Paulding, OH. My university was not far from here, so this is really where I started fossil hunting. I've been here quite a few times, so most of what I found I already had in my collection. A new find for me, and my favorite, is a nice chunk of Protitanichthys placoderm armor. I visited family near Indianapolis in August, and headed out a day early to visit some classic sites. This is the view from a roadcut in Sulphur, IN that exposes the Indian Springs Shale (Mississippian). My first blastoid and first shark tooth of the day. Can you spot them? A small portion of the haul. Lots of blastoids (the main attraction), horn corals, and some brachiopods, plus a crinoid I have yet to identify. Next up was the famous St. Leon roadcut (Upper Ordovician). This was my second visit to this site. You need to get on your hands and knees to spot the tiny Flexicalymene rollers.
  23. I'm slowly making my way through finds from the summer and have come across a couple specimens I don't recognize. The first one is from the Platteville Formation of SW Wisconsin (Middle Ordovician). The second one is from the Maquoketa Formation of NE Iowa (Upper Ordovician).
  24. citrine.colubrid

    What is this?

    Just came back from a short trip to the driftless region of SW Wisconsin and we found a strange fossil in a road cut. I thought it was an algae at first, but I can't find any similar images. Sort of just looks like the rims of a rugose coral, but tiny? Found in Platteville formation.
  25. Here are 2 more Halysites 'chain coral' that I found in the Silurian of Wisconsin. The rocks were soaked in diluted muriatic acid for several hours, to partially dissolve the matrix and reveal the chain corals.
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