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Found 6 results

  1. Here's a tooth I bought with several other specimens from the same locality (Upper Burlington Limestone, Biggsville, Henderson County, Illinois) back in the 90's. It has smooth enamel and is 1 1/2 inches (37mm) along its longest dimension. I have another tooth much like it but it is much smaller and I've seen other teeth like it but this one is the largest I've seen. Years ago, one collector thought it could be Chomatodus but that doesn't match what I see elsewhere. I think it is a tooth form that has been tentatively identified as Orodus or a relative in the past but I don't know Carboniferous teeth like I know Cretaceous-Cenozoic teeth. This may be a lateral tooth of a taxon with different anterior teeth.
  2. Hi, I am in search of Plate 8 from the following paper. Yes, the paper is published online at Biodiversity Heritage Library, but both Plate 8 and its accompanying "Explanation" (i.e., captions) page are unfortunately missing from the online edition. Please post a scan if you have easy access to Plate 8 from this paper, thanks. Driscoll, E. G. 1965. Dimyarian Pelecypods of the Mississippian Marshall Sandstone of Michigan. Palaeontographica Americana, No. 35.
  3. Hi all, I collected this lovely crinoid calyx stuck in a Favosites sp. from the Fern Glen Formation in Imperial, Missouri (Mississippian, Osagean Series). My guess is Platycrinus stellatus (based on Weller, Stuart, Kinderhook faunal studies; V, The fauna of the Fern Glen Formation. Geol. Soc. Am., Bull., vol. 20, 265-:332, (1909)) but I would prefer some more opinions since I'm new to paleozoic strata. On that note I would also welcome learning references on crinoids, especially regarding the Mississippian and Pennsylvanian. Thanks for any help or information. -Tom
  4. I need help with this one. Ive been searching the internet; but there is precious little works on Lower Mississippian bivalves. So I thought Id turn to you guys either for an id or to point me in the direction of an expert in such things. Its from the lower Mississipian epoch of the Carboniferous. The Fort Payne Chert, the black shale member (not sure if that has a name.) Its fairly large for a bivalve from this time period. Im not sure if they are related but Ive also been finding these. I believe its also a bivalve but I havnt found more than one valve. They are a lot more common than the bigger one. With the similar concentric ribs, they may be younger versions; though the overall difference in shape makes me doubt it. I appreciate any help you can give me.
  5. Sometimes, when you go on a fossil hunt, you find more than just fossils. Some friends and I traveled to southeastern Iowa in Spring '18 to scour the Mississippian for fossils, but while there, we noticed that many of the homes that we drove by sported geodes in their front yards. Intrigued, we decided to investigate for ourselves. As it turns out, the area is well-known for its geodes (Iowa's state rock is the geode), so we promptly decided that we had to collect some for ourselves. We eventually found a privately owned piece of property where we could fill a bucket with geodes for about $20, descended upon a stream cutting into the bedrock, and filled a bucket in short order. Then, on a return trip to Iowa a month later, we found another outcrop of geodes along the Mississippi River. Once again, we collected handfuls. Then, once we got back, we split them with a geode cracker. They varied in quality; some were stunningly beautiful, and others were less so. They were filled with all manner of minerals: some had chalcedony fillings; others had quartz crystals, and still others had minerals that I didn't recognize. The colors varied, too: pink, white, light blue, red, and brown. As it turns out, we were a little overzealous in our efforts; we collected about 50 pounds of rocks. We've given them away to as many friends would like them and have only just now run out of them a year later. Pictured below is a fraction of the haul. If you happen to find yourself in this neck of the woods, then remember: the Osagean of Iowa and Illinois has more than just crinoids. If you would like more information on them, where you can hunt for them, or even the annual Geode Fest, then check out this link. http://keokukiowatourism.org/geodes/index.php
  6. Greetings, all! I am currently writing a thesis involving fossils from the Burlington Limestone near its type section along the Illinois/Iowa border. To demonstrate the diversity of the crinoidal remains from the limestone (over 400 species have been described from the Burlington alone!), I am looking for photographs of articulated crinoids. Do any of you have any that you would like to let me include in my thesis? If possible, I would like high-res images of crinoids identified to genus or species with a scale bar/ruler present in the image as well as the collection/locality info. I can't guarantee that I will use every image posted, but if I use your image, then I will acknowledge you in my acknowledgements and give you credit for the image. Thank you for your time & assistance! -Elasmohunter
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