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  1. SilurianSalamander

    What kind of burrows are these?

    I found these burrows in Ordovician-Silurian rocks in Waukesha Wisconsin. I found hundreds of these just a few weeks ago in Green Bay WI (Ordovician) any way to identify what animal made these burrows? Thanks! ps: so sorry I forgot the scale
  2. I was in Milwaukee for a concert last weekend and I decided that I should revisit the local natural history museum while I was there. The Milwaukee Public Museum was a childhood favorite of mine- it honestly left a stronger impression on me than the Field Museum, and there is one main reason for that: their incredible life-size reconstructions of prehistoric life. So that is where my focus for this report will be. The fossils on display were mostly casts, and nothing stood out to me as particularly notable. Near the entrance, the museum had a diorama showing paleontologists
  3. favositefinder

    Paraspirifer acuminatus?

    Trying to figure out the species of brachiopod but I’m unsure. Founds on Lake Michigan in southern Wisconsin. Measures roughly 2 inches
  4. SilurianSalamander

    Gastropods or tube worms?

    Found these weird spirals in this chunk of agatized rock. Devonian from Bradford beach in Milwaukee. Thanks!
  5. SilurianSalamander

    What kind of sponge is this?

    Silicified sponge(?) fossil found in Wisconsin Paleozoic gravel. Likely Ordovician or Silurian, possibly Cambrian or Devonian. Thanks!
  6. I've been researching good fossil sites near/at Milwaukee, Wisconsin (primarily from the Milwaukee Formation (dating to the Middle Devonian (Givetian)) when I just found out the most of the Devonian fish fossils that have been found from that formation have been found from a particularly member strata - the Berthelet Formation. Gass, Kenneth & Kluessendorf, Joanne & Mikulic, Donald & Brett, Carlton. (2019). Fossils of the Milwaukee Formation: A Diverse Middle Devonian Biota from Wisconsin, USA. I'm aware that time has seen the Milwaukee formation largely bu
  7. SilurianSalamander


    The preservation isn’t the best. Broke open a big piece of dolomite with a nice brachiopod. Found that I had shattered whatever this is and exposed some nice silicified chain coral. It’s sorta a hemisphere with internal structures. My best guess would be some sort of echinoid. Silurian Wisconsin, Hartung quarry
  8. Wisco_rockhounder89

    Unknown fossil

    Found this fossil while digging a window well. It broke from my shovel and this was found inside! Still not able to identify it.
  9. Buzz

    Bone fossil?

    This was found in a back yard in central Wisconsin among dozens of cobblestone type of rocks. I took photos of all sides of it. What is it?
  10. SilurianSalamander


    Found in the side of a building in Wisconsin, Cambrian-Devonian rocks here. Any ideas? Thinking bivalves or a bivalved arthropod. Sorry for the lack of scale! Each one is about the size of an apple seed
  11. 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 ide
  12. SilurianSalamander

    Blue agatized tabulate coral!

    I found this in an abandoned fish nest in a human-made lake. One of my favorite finds!
  13. SilurianSalamander

    Paleozoic trace fossils?

    Sorry for lack of scale! Cambrian-Devonian rocks here. Found in the side of a building.
  14. SilurianSalamander

    Conulariid or nothing?

    Found in Paleozoic gravel alongside crinoids, corals, and gastropods. Sorry if this is just wishful thinking! Thanks. The rock is about an inch tall
  15. I find lots of these external moulds/trace fossils at the Milwaukee formation I hunt at. Any ideas? I’m stumped. Devonian terrestrial and marine deposit
  16. SilurianSalamander

    Marine plants/terrestrial plants/macro algae?

    Found in the stone steps at estabrooke park quarried from the Devonian Milwaukee formation.
  17. favositefinder

    Southern Wisconsin Lake Michigan fossils

    Does anyone have an ID for these?I think the first may be a bryozoan?
  18. SilurianSalamander

    .75 inch trilobite?

    Paleozoic rock. I found this looking back through some scrap rocks. I think this is a stone I found some crinoids, brachiopods, horn corals, and a trilobite in before. .75 inches long (sorry for not including a scale in the picture) thanks!
  19. Found in some landscaping gravel I’ve found boatloads of crinoid stems at. Brachiopods and gastropods are not too uncommon in those rocks. Paleozoic, likely Ordovician-Silurian.
  20. Found in the side of a building and in the surrounding landscaping. From the Cambrian seashore sandstone of Blackberry Hill Wisconsin. The place is known for its fossils of mass jellyfish strandings and its trace fossils of some of the first arthropods, mollusks, and other animals on land. What are these? Thanks!
  21. Tales From the Shale

    Platteville Cephalon

    Found this today in the Platteville formation, SW Wisconsin. In the Mifflin member specifically. From what I see, it looks like a trilobite cephalon? I'm thinking Thaleops ovata. (Cap for scale)
  22. Tales From the Shale

    Estabrook Park 09/30/22

    I went to Estabrook two days ago just because I was in the area. I've hit this area multiple times before. Despite its low fossil yield I think it's an excellent place to start for any new fossil hunters getting into the hobby. The sole outcrop to be found here lies under the bridge overlooking the river rapids. It extends for roughly 30-45 feet. There are soils in the area that occasionally produce small bits of brachiopod and crinoid stem fragments as well. However I mostly keep to the main rock outcrop. Your most common finds within the park are tons of brachiopo
  23. Tales From the Shale

    Wisconsin Ordovician 09/27/22

    Years of searching Wisconsin's various websites and old Geo surveys have always yielded varying levels of success ranging from mediocre, to misses entirely. Not this time, this is effectively the best hunting I've ever had in my home state. Period: Ordovician Formation: Platteville Location: SW Wisconsin Endoceras? I say that primarily based on size. Goniaceras, the flattened curved shape seems to support that? Gabriceraurus mifflinensis? It is a fragmentary cephalon, but that species is more common than other Ceraurids that I've read about
  24. SilurianSalamander

    Tentaculites? Cephalopod?

    Found at work. Ordovician to Devonian. It tapers so it’s not a crinoid stem
  25. Hey guys, I was in the driftless area fly-fishing, and I found this fossil in a public access creekbed. I'm certain it's fossilized coral, but I was wondering if anyone here knew what kind it was, and if it's of good quality. I'm also curious as to why it looks different than many coral fossils I've seen online (not smooth).
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