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  1. Last week, when on an excursion to the Devonian, Cedar Valley Formation, of Iowa, I encountered this fossil. Thinking crinoid, I threw it in my bucket, so that I could examine it closer at home. Now, haven taken a closer look at it, I am unsure..... Crinoid? Cephalopod? Or something else. Your thoughts are very welcome!! Mike
  2. minnbuckeye

    Unknown Burlington

    I had forgotten that a few pieces of Burlington matrix were left in some acetic acid. Found the dissolved specimens today and labeled the known ones accordingly. These SMALL specimens that are shown today are not anything I am familiar with. So it is for this reason I am seeking help!!
  3. I have a partial cephalon of a trilobite from the Galena Group (Late/Upper Ordovician) from NE Iowa that I obtained from Mike @minnbuckeye, and am having trouble ID'ing. Given the partial nature and somewhat poor preservation, an ID may not be possible, but the glabella seems distinctive enough that someone may recognize it even though I believe the eyes are missing. I've removed some matrix from it, but thought I was about to do more damage than good if I went any further. In reading through a variety of papers, the best match I can find is a Greenops species (maybe G. fitzpatracki or som
  4. Cladodus and Stethacanthus are more typical of modern day shark teeth. As can be seen, the tips are not always present, some destroyed in prep, but many tips severed prior to fossilization. Cladodus possesses a straight shaft while Stethacantus is S shaped.
  5. Continuing on with Burlington fish teeth, the next set of photos will feature Orodus.
  6. The next Burlington teeth found this summer to have been termed Deltodus. My ability to differentiate Deltodus from Sandalodus, Helodus (small), and Psammodus is nonexistent. So even though labels say Deltodus, the true identity of some may be the other three genuses. I am open to any suggestions that veer away from a Deltodus ID. Like Chomatodus, Deltodus is a Chondrichthyan. There seems to be 2 general physical types. Blacker teeth seem to be larger and have smaller pores. Lighter colored teeth seem to be smaller and have larger pores. Is this a way to differentiate types??
  7. minnbuckeye

    Mississippian Fish Teeth #1

    Every year, I take some time out to collect the Burlington Formation (Mississippian) of SE Iowa. It is about 70 ft thick in the area I hunt and the limestone is a coarse-grained rock made up mostly of crinoidal debris. Usually, my goal when visiting is to find nice examples of crinoids and brachiopods. But lately, I have taken interest in the primitive shark teeth that exist in the upper few feet of the Cedar Fork Member of the Burlington. So late summer, I threw five 25 lb rocks containing evidence of Chondrichthyan teeth into the back of my pickup to process this winter. Here is an example o
  8. minnbuckeye

    Mississippian unknowns

    While uncovering chondrichthyan teeth from the Burlington fish layer, I have come upon many things I can not identify. In general, the only items having a dark color in this light colored matrix are fish parts. So my assumption is that they are fish oriented...... Here are some examples of items found that are likely not fish teeth. coprolites? Dermal denticles? Just taking stabs in the dark! @Coco, don't pick on me since my measuring stick is not seen well. I will add specimen size to each for you! 1. 2.0 by 1.2 cm 2. 1.5 by 2 cm 3. .8cm
  9. minnbuckeye

    Chondrichthyan Unknown

    I was working through some Burlington Limestone, Mississippian looking for the Chondrichthyan fossils found within. Most primitive shark teeth in this matrix are fairly small, which is why this unknown surprised me when discovered. My suspicion is Deltodus except for the massive size. I welcome all thoughts on this ID. Unfortunately the missing pieces were not found. @Elasmohunter, this one's for you!!!!!!!!!!
  10. I purchased this from a shop in Iowa that said it was a glacial erratic. Does anyone have any idea on what type of coral it is?
  11. kgbudge

    Silurian/Devonian horn coral?

    A friend gave me this ... horn coral? collected somewhere in the vicinity of Springville, Iowa, just northeast of Cedar Rapids. Macrostrat has that entire area underlain by Silurian to Devonian marine carbonate rock. Would be nice to confirm it's a horn coral, and perhaps get a more specific identification. Ruler marks are cm. It will be difficult for me to get a deeper macro with the camera I have, unfortunately. (And, if seeing these didn't have you mentally hearing "budda budDa BUDDa budda" played by a heavy brass sect
  12. Hansons

    What kind is this

    Hello my daughter is into rocks and she stumbled across this. What is this? It's pretty interesting. I've looked all over and can't seem to find anything.
  13. slobob

    Please identify

    I am new to this forum. Can someone help with identification of this? Found in Blackhawk County Iowa along a river bed. Thank you in advance.
  14. slobob

    Please identify

    I tried posting this yesterday but I get a notice that there was a problem with the upload. Not sure why. I would like an ID for this as I am new to this and have no idea what it is. This was found in Blackhawk County Iowa along the Cedar River. I was laying exposed on the rocky river bank. Any help will be appreciated.
  15. Ludwigia

    Schizophoria iowaensis (Hall 1858)

    From the album: Brachiopoda

    ø28mm. Cerro Gordo Member, Lime Creek Formation, Frasnian, Late Devonian. Location: Rockford, Iowa, USA. Thanks to my Secret Santa Crusty Crab.
  16. From the album: Brachiopoda

    ø22mm. Cerro Gordo Member, Lime Creek Formation, Frasnian, Late Devonian. Location: Rockford, Iowa, USA. Thanks to my Secret Santa Crusty Crab.
  17. merikling

    What is this, a bat??

    Unsure what this is found it rock hunting in southwest Iowa neat the river on a friend's property.Looks like a bat in utero petrified
  18. connorp

    Graf Curved Cephalopod

    I found this partial curved cephalopod at the famous cephalopod beds (Maquoketa Fm, Upper Ordovician) at Graf, Iowa last year. It is the only non-Isorthoceras cephalopod I have found from here in my several trips. The only other cephalopod I have seen described from this site is Beloitoceras, but I don't believe that is what my specimen is. Has anyone come across anything similar? Thanks for your thoughts.
  19. Birdyyz

    Large fossilized bone?

    Hello, I found this possible fossilized bone in the creek on my friends 26 acre Farm in poweshiek County, Iowa. The farm is located on Glacier land. The farm has very sandy soil and large Hills that slope down to the creek. I have found many easily identifiable fossilized bones such as jaw, femur, pelvic and teeth but this one looks very odd but seems to have the correct pores and texture. Any help will be appreciated thank you.
  20. seanbob666

    Unknown Tooth

    Found this tooth in Central Iowa in the river. We have had a drought for 2 years, and our rivers are very low, which let's my friends and I find artifacts, rocks, and fossils in the river that we normally couldn't access. We find lots of bison teeth, but this tooth seems different. Sorry, no metric ruler. 2.54 cm in an inch.
  21. Yesterday found me exploring multiple Galena/Ordovician road cuts in northern Iowa. Finds for the most part were good but just the common fossils found in this rock formation. However, one rock I examined contained a positive and negative relief of something I do not recognize. Hopefully someone can put an ID to these pictures!!!!!! Positive front Positive back Positive from the side negative imprint Both positive and negative together
  22. Hello I'm new to the fossil forum and hopefully I provide enough information. I found this fossil egg looking Rock in poweshiek County Iowa. One of my close friends owns a farm and we have been finding several possible fossils in the creek and near the surface on the hillside. The farm is 26 acres and located on Glacier land which is very Sandy with steep hills down to the creek which starts about two miles away from me natural spring and never dries up. This one was found about two feet below the water, sand and mud. It appears as if the little rascal was hatching, that is if it's an egg. Tha
  23. minnbuckeye

    Pink Fossils and Glass

    Last Sunday, our rock club took part in Morrison, Iowa’s Pioneer Craft Fair, with a goal of educating the children in various topics of paleontology and mineralogy. I took the opportunity to discuss ancient sharks and show a variety of specimens that I have accumulated. Even the adults had a hard time grasping that one of my display of teeth were actually from Iowa. The children then had the opportunity to split open some “rocks” revealing sharks teeth within. It was a hit and I enjoyed it more than the kids!!!!!!!! I did have the opportunity to explore a few fossil sites before the fa
  24. A little over a week ago I moved to Louisiana. On the way down I tried to set aside a little time to stop at a few places and collect. I made a couple short stops at roadcuts south of Minneapolis to some success (brachiopods, rugosa, Flexicalymene, etc.) but the most impressive stop was the Fossil and Prairie Park outside of Rockford Iowa. It's surely well known by collectors in Iowa but I found it by accident while researching my route down. A town that owns it's paleontology history is always nice and the town was beautiful. I wish I had more time to hang around and try the bar o
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