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  1. Last weekend I had the opportunity to spend a few hours collecting in a quarry in northern Illinois that exposes most of the Galena Group (Late Ordovician). There was lots of fresh rock to hunt through, and it was a good and productive trip. As usual, lots of gastropod molds were found. Hormotoma sp. Liospira sp. Sinuites sp. Lophospira sp. Subulites sp. Unknown gastropod. Looks like Liospira but appears to curl in the opposite direction. Brachiopods show up too. Most common are molds of what I believe are Rafinesquina (@Tidgy's Dad?). The inarticulate Pseudolingula iowensis is somewhat common. Specimens are almost always crushed and missing shell, but they usually have some shell preservation which contrasts nicely with the yellow matrix. Occasional bivalve molds are found. This one has calcite? crystals. Trilobite parts are uncommon, and the only species I've seen from this quarry is Thaleops, possibly Thaleops laurentiana. Here is a cephalon I found. Now for my favorite finds of the day. A partial specimen of the small receptaculitid Ischadites iowensis. Fisherites is very common at this site, but I had not come across Ischadites before. A partial conulariid. Judging by the visible cross section, the back side is present, so this should hopefully prep out nicely. And finally, what might end up being a complete trilobite. Not sure if there is any more buried, but it does look like at least some of the shell is preserved, so fingers crossed!
  2. minnbuckeye

    Time to Do Some Post Holiday IDs

    Now that the holiday festivities have past and we are waiting for the New Years celebrations, I thought I would finish up the year with a few ID requests on some Galena/Ordovician finds from NE Iowa last month. 1. 2 3. 4. 5. 6.
  3. As I went through the rocks I had collected in October from the Ordovician's Galena, likely Stewartville Formation, a SMALL gastropod popped out of a piece of matrix that was split open. After looking thorough my references, I could not place this fossil. Hence the need of your help.
  4. minnbuckeye

    Re-ID a Galena/Ordovician fossil

    I have found a few of these mis identified fossils from the Galena/ Ordovician. A request for identification was made awhile back and I labeled them Asgadaspira evolvens based on a response given to me. Having just exposed another one, I searched for it on line and nothing came up. Did I misspell it or am I just out in left field? By the way the first one measures 8cm by 5cm.
  5. minnbuckeye

    Maclurites Galore!!

    On Sunday, I took my once a year opportunity to get permission to enter a quarry that exposes the Galena, Ordovician rock of NE Iowa. The gentleman that owns the quarry enjoys the beer that I use as bargaining chips and it worked again!! As I approached the quarry, it became apparent that a new area was stripped of topsoil, leaving a flat bed of Stewartville Formation exposed for me to wander across. This formation is famous for the gastropod, Maclurites, which many local fossil hunters cherish such as @Bev, and it didn't disappoint. This was the easiest collecting I had done in awhile, just wandering across the exposed rock picking up it's treasures. Luck was with me last Sunday, in that this ledge was to be blasted the next day and ground into gravel! A few other gastropods were found as well as an occasional cephalopod. But the predominant fossil was that of the Maclurite. Here are just some of the loose ones found. I personally have a attraction to fossils left in matrix.
  6. I collected this trilobite pygidium in the Galena Group (Upper Ordovician) of Illinois. I don't immediately recognize it, especially since it is just a mold. It is fairly large. My best guess is Isotelus but I was hoping one of the trilobite experts here might have a better idea. Thanks for any help.
  7. A post was made a few weeks ago showing the Decorah Shale finds during my last fossil hunt of the year. During that trip, a section of Stewartville/Galena/Ordovician was visited too and I just finished processing my finds. In the bucket were a few unknowns that I am hoping to make known!!! 1. My guess is likely correct for this one. Beekite? I notice on the picture that that a piece of Isotelus trilobite is peeking out in the lower left corner and is probably the reason for the beekite formation. I have searched through Galena countless times and have not run into this before. 2. This one has a distinct ridge running down it and has more subtle ridges running perpendicular to the central ridge. They are difficult to see in the photo. 3. This small almost circular fossil (4mm) has a peculiar ridge down its center. 4. Finally, this "cross" measures 8 mm. It does not appear to have characteristic of a bryozoan on its surface. If it is part of a deeper fossil, I was wanting to know what it was before I explore further with my Dremel.
  8. minnbuckeye

    Graptolite?

    Locally, graptolites are very common in the Maquoketa/ Ordovician rock. They present themselves as 2 dimensional creatures on certain bedding planes. Below the Maquoketa is our Galena. It has graptolites but uncommon. Again, they present themselves as 2 dimensional. The "unknown" specimen from the Galena, presented today, is obviously 3 dimensional and I venture a guess that it is a Graptolite. But I thought I would seek opinions in that I have seen thousands of local graptolites but never one that is 3 dimensional. Could it be something else??
  9. I had brought home a piece of Galena/ Ordovician matrix that had some unidentifiable critters hidden in the rock. Time was taken to extract what I am sure is a cephalopod from the matrix. Haven hunted this formation for years, I can honestly say this is the first cephalopod found exhibiting its curved features discovered by me. Attempts to ID the fossil have been fruitless, so I am asking for help! The fossil fractured during its prep revealing what I see as a siphuncle. Here is the repaired specimen:
  10. I was busting up a few rocks from the Ordovician/ Galena of SE Minnesota when I noticed this unknown peeking out at me. It would be nice to understand what it is so a decision as to whether to expose more of it can be made. Thanks! By the way, it is 6 mm in length. Mike
  11. Over the weekend I took a quick two day scouting trip up into the Ordovician of Iowa and Minnesota. One of the around dozen sites I visited was a roadcut in Winneshiek County, Iowa in the Galena Group, probably Dunleith Formation. I was in a bit of a rush and only collected here for 20 minutes or so, but it seems like a very productive site that I will certainly visit again. A three-dimensional graptolite (Diplograptus?) Liospira sp. I picked this piece up for the nice cephalon (Calyptaulax I think), and was pleasantly surprised to find at least a partial trilobite on the back. Maybe Bumastoides? Not confident there is much more buried but a good find for me either way. My favorite was this small but very well preserved Fisherites reticulatus. They rarely split this well. This one is very inflated, and although broken in half, it's kind of neat to see the cross section.
  12. minnbuckeye

    New Gastropod for Me

    I stumbled onto this cute tiny gastropod from the Galena/Ordovician in Minnesota but am having difficulty with its identification. Strophostylus textiles is listed as a possiblity in Minnesota Fossils and Fossiliferous Rocks by Robert Sloan. What do you think?? Mike
  13. Echinoderm identification help please! Polished cross-section in the Kimmswick Limestone (Late Ordovician: Katian; Missouri, USA) used as facing stone at Missouri Botanical Garden. Possibly the paracrinoid Implicaticystis (once known as Comarocystites)? Specimen is ~25 mm across.
  14. I found this specimen in the Galena Group (Middle/Late Ordovician) of northern Illinois. Seems familiar but I can't place it. Any thoughts?
  15. UPDATE: These seem to just be weirdly incomplete cross-sections through ordinary cylindrical meroms. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This weekend in the Kimmswick Limestone in eastern Missouri (Pike County) I saw plenty of receptaculitid algae, mostly of genus Fisherites. But one cross-section has a feature I've never seen before: a fringe of what look like erect spines on the external surface. Can someone point me to a reference for understanding this feature functionally and/or taxonomically? I've looked in the usual places but I don't seem to be finding anything about spines. (If I were a vertebrate paleontologist, I would be saying they were feathers and proclaiming receptaculitids' "Sinosauropteryx moment.") Thanks.
  16. Last month I was able to make a brief trip to hunt the Ordovician rocks of the Upper Mississippi Valley. The stratigraphy up here was very confusing to me at first since a lot of the units are very similar looking. To that end, I am endeavoring to include more site pictures in my trip reports of this area, in the hope that it will assist others when collecting this area. My first stop was in SE Wisconsin. Unfortunately the right of way was much narrower in person than on Google Earth so I did not feel comfortable collecting here. But it was a great site to observe the three lowest members of the Platteville Formation. The lower massive dolomite is the Pecatonica Member, the middle thinner bedded limestone layer is the Mifflin Member, and the slightly thicker bedded limestone above is the Grand Detour Member. These can be tough to differentiate on unweathered outcrops, but become quite distinctive after weathering. Next I checked out a couple of my favorite Maquoketa Formation stops in NE Iowa and had some luck, although I have nothing to show as everything is off being prepped. I also stopped at a very long roadcut exposing the top of the Decorah Formation and the entire Galena Formation. This picture shows the contact of the Ion Member of the Decorah and the overlying Dunleith Member of the Galena. The Ion is well known for having an abundance of the gumdrop bryozoan Prasopora. The one on the right below is itself encrusted with other bryozoans. This was the end of the first day. On the second day, I made my way up to SE Minnesota for the first time. The picture below shows the contact between the Prosser (Dunleith equivalent) and Stewartville (Wise Lake equivalent) Members of the Galena Formation. The Stewartville is well known for the lovely large gastropod molds that can be found, such as this very displayable Maclurites. I finished off the trip at two sites in the Maquoketa. Graptolites were probably the most commonly encountered fossil, although they weather quickly and you need to split rock to find nice fresh examples. And to finish off the report, here is the best of the trilobites I found. The cephalon has some damage, but it is otherwise a nice inflated specimen. Anataphrus vigilans Elgin Member, Maquoketa Formation Fillmore Co., MN Prepped by Malcolm T. Thanks for looking, hope you enjoyed!
  17. minnbuckeye

    Local Ordovician Trip

    It has been 7 years now since I became hooked on the "fossil thing". My hunts seem to creep a little further from home with each passing year. Greener pasture syndrome. So a few days ago, I purposely started my adventure close to home. Here are a few finds from the Ordovician. @ClearLake Let me start with a few unknowns: This last one could just be a squished brachiopod, but seems to be a coiled organism. IDed as Trilobite eye, probably Isotelus The pygidium pictured came from a new spot I tried, expecting to find Isotelus. The pygidiums look more like Bumastus???? Actually IDed as Homotelus(?) florencevillensis. Again, not Bumastus, but Homotelus(?) florencevillensis. The trilobites came from the Maquoketa, the others from the Galena. I collected a few brachiopods (Galena) to please @Tidgy's Dad The Galena locally has many gastropods.
  18. This weekend I had the opportunity to spend a couple hours hunting in the Galena Group (Upper Ordovician) in northern Illinois. The Galena around here is mostly massive dolomite, so most fossils are preserved as molds. Mollusks dominate the fauna, especially gastropods, although other interesting specimens crop up from time to time. Burrows A large orthoconic nautiloid Fisherites are fairly common in some beds, although extracting complete specimens is challenging. Thaleops sp. Some better gastropod examples Interesting minerals can be found, such as these pyrite crystals. Fisherites On occasion, fossils with remnants of their original shells do show up. The most common seems to be Pseudolingula. The best find of the day was this conulariid. I have never found a conulariid in the Galena before, so it was quite a surprise. And that's all. Hope you enjoyed!
  19. minnbuckeye

    Wasting Some Time

    I have been good friends with a gentleman from Kansas for many years now and have seen him go through three kidney transplants at Mayo Clinic. He is here for another surgical procedure and is staying with my family. I took him over for a post surgical check up and had a few hours to waste. So off to look at a few rocks south of Rochester, Mn. until Ed was finished. A maclurite was soon spied weathered in a slab of rock. When a fossil hunter sees this, take the time to split that rock. So I did and these Maclurites were exposed. A short trip, but fun nonetheless. Mike
  20. Today I joined a local club on a trip to a dolomite quarry (Ordovician, Galena Group) in northern Illinois. This was the first trip of the year as the rest have been cancelled. The quarry was quite massive, so social distancing was not a problem. We hunted in rock piles in the middle of the quarry (very far from the high walls) that were scheduled for crushing. It was quite a beautiful place. Besides some hammering, all I heard were large birds that were circling above. The fossils found here are pretty standard for the Ordovician rocks in the area. The Galena Group here seems to be a lot more dolomized than further north in say Minnesota, so most of what is found are molds. Fisherites were somewhat common. They were quite massive so I only took home a small chunk of one I broke up. The most abundant fossils were these gastropods, I think Maclurites. They were everywhere but rarely came out complete. Hormotoma gastropods were also present. I believe this is a cranidia of the trilobite Thaleops.
  21. Mike from Red Wing

    Trilobite? Lacking Distictive Features

    The fossil was collected on the Deer River near Spring Valley, Minnesota. It is shaped like a trilobite, but it doesn't have any distinctive features, as the shell is mostly smooth. It somewhat resembles a shark tooth, but were no fish at this time. The width of the fossil is about 17 mm.
  22. minnbuckeye

    Totally Odd Fossil? or Burrow????

    I picked up this rock while exploring a few weeks ago and noticed what looked to be an imprint of a crinoid stem in the rock. For whatever reason, I threw it in my bucket. At home, upon further examination, I came to a conclusion that this was not a crinoid imprint and was perplexed as to what it was. As you can see above, there was a big crack in the rock, self induced in order for me to see deeper into this. Here is the specimen after the rock was chipped away. The "lines" fade away as one goes deeper into the matrix until the surface becomes smooth. Next are views of the piece removed showing a tubular structure that is ribbon like, twisting and turning. Finally a few close ups of the ribbing in the initial picture. Leech like is how I would describe this, though I am aware, this is NOT a possibility, only mentioned to provide a mental thought while the images are examined.
  23. Last week was a tough week as I tried to stay home as much as possible. On top of the Corona situation, a snow storm dumped 9 inches of heavy wet snow on us. The rain/ snow line was only 30 miles south of us so after looking out on the white landscape for days, I was ready to see green grass again. A decision was made to trek south for the day and enjoy spring again, but with no human interaction. I had wanted to look at a road cut that was discovered on Google-earth this winter and thought this would be a great opportunity. So I was up and on my way early the next morning, leaving the snow just as the sun began to peak above the horizon. The drive through this country is always beautiful. Gently rolling hills with an agricultural community that still is mostly "family farm". The road cut that was explored is shown next, exposing the Stewartville member of the Galena Formation, Ordovician. Road cuts that expose this layer are always nice to explore in the spring. The face is very crumbly and it is obvious in the next picture where the new exposures are hopefully revealing a fresh crop of fossils. Next are some photos showing the fossils hidden in the cliff face. One must be careful not to overlook the sloughed rock at the base of the exposure. Not always are the fossils easily extracted as is shown here!! That is why a bottle of superglue is ALWAYS in my pocket. Almost as important as my rock pick.
  24. minnbuckeye

    Unknown Ordovician Tube

    Here is a tubular structure that I am unaccustomed to finding in the Galena, Ordovician rocks of SE Minnesota. All thoughts are welcomed!!!
  25. Due to an upcoming order from our Governor to stay at home, I took the opportunity to fossil hunt last Sunday afternoon before it begins. The ground was white with an unexpected snowfall overnight when I left the house but soon melted. My goal was to look at road cuts for rock slides from the winter's freeze thaw cycle. Digging and splitting would be tough with frost still in the ground. The first spots searched were Ordovician, Galena. Here are a few representative fossils from the Galena of SE Minnesota: From there, I slipped over the border into Iowa to look at Ordovician, Maquoketa. A sluffed hillside provided me with some rock that I wasn't that familiar with. Here are some finds: The first picture is almost clay like, different than the normal Maquoketa that I am used to.
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