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Found 7 results

  1. I recently collected some Muncie creek concretions from the Kansas City area. I had previously only found a few concretions, but this time I was fortunate enough to end up with about 10. Several had Conulariid sections preserved, which I was excited about. Back home, I cracked open the remaining concretions. One of them had a tiny little brachiopod, and I didn't think much of it. Later, looking at it under magnification, I was astounded when I found the remains of the preserved pedicle! This is where I am sad to say, that in my excitement, I forgot to take pictures of the fossil prior to me prepping around the shell to aid in id. Anyways, after prepping around the shell with a hand scribe, I was excited to find that it was also my first lingulate brach. Orbiculoidea capuliformis Sorry for making you read all of that, here are the photos: Scale is in cm. Here are several interesting articles/papers for anyone interested. https://www.diva-portal.org/smash/get/diva2:373816/FULLTEXT01.pdf https://www.researchgate.net/figure/a-b-The-brachiopod-L-chengjiangensis-represented-by-stout-pedicles-marked-by-numbers_fig1_24424671 Despite being small, there is a lot of potential with Muncie Creek shale concretions. I learned a lot about them, and their existence, here on TFF. @Missourian has found many astonishing finds, and I noticed that soft tissue preservation is prevalent in many of his best concretions. Hope y'all enjoyed this. Have a great day, and a great weekend -Jay
  2. From the album: Desmoinesian Series

    Orbiculoidea capuliformis, Central TX Strawn Group Undivided Apr, 2023 My first inarticulate brachiopod.
  3. Well, it has been a while since a post on the Silurian Leighton Fm. Had to make a trip due to family matters, and once I got back had a lot of work to do. I finally got into a position to start splitting and prepping more shale, and found this new little guy. I am torn between an operculum of a gastropod, and an inarticulate brachiopod. My main argument for an operculum is because of the shape - the only inarticulate brachiopods in this formation are Orbiculoidea and Pholidops. Unfortunately, I cannot find any reliable papers on the brachiopod Pholidops, it looks very similar but there is quite a bit of variation. The gastropod Australonema (possibly Cyclonema) is found in this formation, and the operculum of the genus is very similar to my specimen. On the other hand, the rarity of such Paleozoic opercula make me think that this is a brachiopod. And now for the specimen itself. It was not found in association with any gastropods, but was next to numerous Nuculites bivalves, some ostracods, and a tentaculite. The pictures below first show the two opposite halves of the specimen - unfortunately one was damaged when the shale split. Thanks for reading!
  4. I was fortunate to be able to take two trips recently to the Marmaton group in Northern Missouri and wanted to share my trip report with the forum. It's hard to find information on the Marmaton in Missouri, and I struggled with the geology and understanding what members within the Marmaton I was seeing, but I had a great time non the less. I grew up in this region and have some ‘insiders’ information on a few spots I wanted to check out just from spending time running around the countryside as a kid. The first was in a local creek in the township I grew up in that contains concretions we called ‘dragon eggs.’ I was curious if they would contain fossils so on my first trip in early September I committed to breaking one open. First, here are a few pictures of the site: I was able to break this one open, and it did contain fossils! The blue line on the lower left marks a very thin layer of limestone that the concretions seem to form right above. Here are a few more pictures of the concretions for reference. A particularly large one: And one that is just cracked: Unfortunately for me only the very first one I broke had any fossils. I spent several hours hoping another would reveal some but luck was against me at that point I guess and I failed to find a single one. Frustrated I spent the remainder of the evening searching through the fallen limestone exposures. The next post will contain some of the specimens from the single fossiliferous concretion and the limestone.
  5. Lit.: EDWIN K. MAUGHAN and ALBERT E. ROBERTS (1967): Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian Boundary in Montana. GEOLOGICAL SURVEY PROFESSIONAL PAPER 554 7 B Lutz-Garihan, A.B. (1979). Brachiopods from the Upper Mississippian Bear Gulch Limestone of Montana. Neuvieme Congres International de Stratigraphie et de Geologie du Carbonifere. Compte Rendu Vol. 5: 457-467 pp. EDIT: Subperiod is Mississippian and Epoch is Late.
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