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Found 129 results

  1. Bumastoides(?) 2

    From the album Fayette County Iowa

  2. Bumastoides(?) 3

    From the album Fayette County Iowa

  3. Did I find a tooth?

    Hello all - I am new to this forum, and I hope that I provide you with the correct information - Please let me know if you need more. I found this today on a sand bar in Iowa; it caught my attention because it looks like a fossilized tooth. The rock part that represents the 'tooth' is different in color and texture than the part that represents the 'gum' area. Maybe it is just an odd looking rock, but I thought I would send it out to all of you experts to get your thoughts. Thank you to all! (this is such a neat site - I am glad that I found it; you are all SO knowledgeable)
  4. What is this fossil?

    Found this fossil at Rockford, Iowa, last week with a student group, and it didn't show up on our identification sheets. It's about the size of a quarter. Can anyone tell us what it is? Thank you.
  5. Confused by Orthocone Cephalopods

    In the driftless areas of Minnesota, Iowa, and Wisconsin I find many Orthocone Cephalopods. Each one seems to have its unique way of being preserved, some as an outer shell, others with their internal anatomy showing. A few weeks ago Raggedy Man posted a cephalopod that looked to be a siphuncle to me. Bev on the otherhand thought it was a phragmocone. No experts chimed in so a conclusion was not determined. That following weekend, I did a little collecting in Iowa. The trip was highlighted with the finding of many cephalopods. As I cleaned the findings, my mind went back to Raggedy Man's post. The more I looked at these collections, the more I wanted to understand the anatomy exposed. I think my biggest frustrations are telling siphuncles from phragmocones. Are siphuncles always smooth surfaced? Should septa be seen in any unworn phragmacone? How does one differentiate phragmacone from the external surface of a cephalopod? Finally does anyone have a good site that ID's our local Ordovician cephalopods? Thanks for any input!!!!! Now enjoy my finds. By the way, since it IS football season, I HAD to use a BUCKEYE to size my cephalopods. If anyone is unfamiliar with a buckeye, it is a little bigger than an acorn. For any of you buckeyes, OH......
  6. Central Iowa Devonian Gorge ID please

    I picked up these fossils near my home in central Iowa twenty years ago. I lived near the Saylorville Lake spillway that broke during a major flood in 1995(?) and exposed some Devonian fossils. Can someone help me with the ID please? The last three pictures are from the same fossil.
  7. Isotelus Iowensis

    Just got this Isotelus Iowensis done with prep. From the Elgin member of the Maquoketa formation (upper Ordovician) in Fayette County Iowa. He was about 12cm long. Too bad he had some damage that I am not able to repair but still a good overall representation of the species.
  8. Hi everyone! I found these fossils here in Iowa and am wondering if someone could help me out with ID. Also, could someone explain to me how the white stripe-like patterns are formed on the one rock that I am holding in the photo. The flat stone with the two circular indentations follow through to both sides (i took images of both sides). The 2nd and 3rd images show a bunch of dark ridge like structures and I am curious what those are of. The 5th and 6th photos I am wondering what the circular type fossil in the rock is of. Thanks for all your help!
  9. Please Help I.d. This Fossil?

    I found this today at the rock quarry located in Crescent, Iowa. I was busting shale when I noticed something shiny amidst the rubble, and found this. The professor on the trip (I went with my college) said she had never seen anything like it before. The shiny part reminds me of mother of pearl. The professor guessed that it may be a wasp, but she suggests that I get it identified by someone with more knowledge/experience than her. Any ideas??
  10. Hello everyone! I am not positive, but I thought this could be a fossilized coral of some type (chain coral, or tabulate coral maybe)? I've looked at the edges of the dark ridges under a microscope and could see tiny pores. I live in central Iowa and was searching along an eroded creek bank when I found it. Could someone help to confirm what it is or help to point me in the right direction of what it could be? Any help is appreciated! Thanks everyone! -Sydney
  11. The ground is still free of snow, so I would like to go on one last fossil hunt of the season. Are there any goods sites within 20-30 minutes of Des Moines?
  12. All I can say is that it's a sponge... I've looked through "Sponges of the Ordovician Maquoketa Formation in Minnesota and Iowa" Rigby and Bayer, 1971 and can't seem to find a match there. The Maquoketa is similar in age to some of the formations in the Cincinnati area if that helps at all. Sponge Maquoketa Formation, Elgin member Upper Ordovician, Richmondian Northeast Iowa Size: 2.1cm long 1.7cm wide across bottom.
  13. Preliminary work...(fossil report to follow if you want to skip this) About a month ago, my father and I found a site we had never been to. We discovered that Ectenaspis beckeri parts were in a specific zone at this site and decided to come back on Oct. 6th to find some more for our study collection. We also wanted to do a little mapping to figure out exactly where we were in the formation. There are two cuts about a quarter mile apart, one at the bottom(cut A) and one towards the top of the hill(cut B ). Through much research, we found out that cut B exposed the contact between the Clermont and Ft. Atkinson members of the Maquoketa formation. We also found out that when cut B was made the contact between the Elgin and Clermont members was exposed in the ditch. This gave us a baseline to figure out where in the section we were. There is a small bridge at the bottom of the hill near cut A so we contacted the Iowa Geological Survey and got the exact elevation of the bridge. We also got the elevation of the top of the Galena formation from the IGS at various points in the area recorded from core samples. The Elgin member of the Maquoketa fm. lies directly on top of the Galena formation. Since my father works at and engineering firm, he had easy access to a theodolite and leveling rod. We started at the bridge(since we knew the elevation) and worked our way up the hill to cut B. We took a number of measurements and recorded the change in elevation between the bridge and the contact between the Elgin and Clermont members. We then shot from the bridge to the end of cut A and recorded that elevation change. We then measured the height of the cut and the thickness and elevation of the zone that was producing the E. beckeri parts. Why did we do all this? Well, this information will give us the exact thickness of the Elgin member(in this area), the elevation of the E. beckeri zone, the "slope" of the Maquoketa fm.(in this area), and the potential to be able to map other possible E. beckeri sites. It will also be useful when we eventually donate our collection to a University, the more info the better. Now that our preliminary work was done we could finally start collecting! Next post... A picture of my father surveying the hill. I was behind the camera/phone holding the leveling rod.
  14. Just went out for a quick kayaking trip to scope out the END of the English river. River Junction to be exact, ran up on the sand due to low water levels. As I was walking over the sandbar I notcied several fossilized corals, that I'm sure of. However, I also found this tooth and it seems to have started my newly found hobby of fossil hunting. I love this site just from browsing for a few mins and I would appreciate all the help I can get on this tooth. My curiosity is driving me nuts! Bison? Cow? Horse? Sasquatch? Thanks again!
  15. On Sunday Sept. 8th, my father and I had to make a trip to Northeast Iowa to pick up a cupboard. Since we were in the area, naturally we thought we should go fossil collecting as well. After doing a lot of research last week, we decided to do some scouting and see if we could find any new productive sites. The first site we stopped at for only a few minutes. All we were finding were stromatolites and the occasional Favosites coral. Later in the day we realized that the site was not in the Ordovician but in the Silurian. I may have to go back to collect some stromatolites to cut and see how well they polish, they were extremely abundant. We continued on and looked at our notes and topo maps(on paper even) to locate likely sites in the Maquoketa Formation. We found one site that showed the contact between the Clermont and Ft. Atkinson members of the Maquoketa and searched for a while. It seemed pretty void of trilobite material, but I did find a beat up cephalon of a Bumastoides beckeri that I didn't collect. I was surprised to find a small crinoid and despite my father's heckling I collected a section of worm tube/burrow free of matrix. Our next location turned this fun scouting trip into a fantastic outing. After spending some time looking at the shale my father shouted "We're going to be here a while!" I asked why and he told me to come and see. I walked over and he showed me a rock and I immediately recognized what it was, though I have never seen one it person. It was a cephalon of an Ectenaspis beckeri, one of the strangest looking trilobites in the Maquoketa Formation. Shortly after that I picked up another cephalon in similar condition. After 2 more hours of battling brush, grass and the occasional snake we left with 4 cephalons and a pygidium. I also picked up a sponge and an unusual curved cephalopod, but that was quickly overshadowed by the trilobite parts. After decades of collecting the Ordovician of the Upper Mississippi River Valley it's very unusual to be able to add a species to our collection that we haven't collected before. The final stop of the day was an oldie but goodie. I didn't really have high hopes of finding a complete trilobite and was primarily looking for Ceraurus parts for study. After a while crawling around, my father yet again shouted out. He found a nice laid out Calyptaulax sp.; the cephalon is slightly covered so I can't properly ID it yet. And just like the Ectenaspis cephalons, I quickly repeted that I had just found a Calyptaulax, though his was much much nicer. Mine was a little disarticulated, the head was broken in half, it was rolled and smashed flat. Kind of a sad excuse for a bug, but it was a Calyptaulax! I continued my crawl and after collecting a few more trilobite parts I noticed a laid out Cybeloides iowensis! It was broken in a few spots, but I believe I have all of the rocks so it can be glued together. It looks like it should turn out quite nice. So the day started out as a scouting mission and ended up being one of the best collecting days of the season! Maquoketa first stop finds: Brachiopod And an out of focus crinoid calyx. I'll try to get a better photo tonight Maquoketa second stop Ectenaspis berckeri cephalons and pygidium: Sponge Curved cephalopod Final site photos on next post...
  16. Crinoid Holdfast

    From the album Other Fossils

    Another holdfast from the Maquoketa formation.
  17. Crinoid Holdfast

    From the album Other Fossils

    This is a crinoid holdfast attached to a cephalopod. There are a couple more smaller ones to the upper right of the large one.
  18. Crinoid Holdfast

    From the album Other Fossils

    These are multiple crinoid holdfasts on what was once a cephalopod.
  19. Eldredgeops norwoodensis

    From the album Trilobites

    A triple specimen of Eldredgeops norwoodensis from Johnson County, Iowa. The first photo is as found. After cleaning it with water and a toothbrush I noticed there was a third specimen. The matrix is quite hard and requires dolomite powder as the abrasive.
  20. Two For Now...

    ok I am asking for help identifying these two fossils..the first is from Davenport Iowa, I found it along the Mississippi River. I did some minor prep work with a scribe and was surprised at what I saw. Little spikes..? all around it, I also have another similar one with some color to it with two large spikes protruding forward from the rear hinge point. The second was found at Dresden Generating Station (Morris Illinois) in the crumbled rock they use for fill. (I got bored and had to check out the rocks) It appears to me to be a type of Illaenus sp. but which one I dont know.
  21. Eldredgeops

    From the album Trilobites

    Here is an Eldredgeops norwoodensis from the Devonian Little Cedar Formation of Iowa.
  22. Gastropod & Micro Fossils

    Hey all, thought I would share some photos with you and get a few questions out. A while back I found a peice of gravel in my driveway that comes from a mine in my area. One of the few underground limestone mines in Iowa, Ames Mine (Martin-Marietta). See the topic tags for the type of limestone it most likely is. Anyhow, most of it is pretty devoid of any fossils, its a gray (mostly oolitic) limestone, some of it dark gray, some of it light. This peice of gravel popped out of the mix, its as far as I can tell a aquatic snail. The outside was beat up so I decided to take it to a grinder and flatten it to bring out the spiral in it. The front gave a pretty nice spiral, and I went to do the back of it, and apparently it got squashed pretty flat. A crinoid stem is there and under the microscope I found some pretty interesting tiny fossils. The square one seems to be a blue green alga, and a very tiny gasropod in the next. I know that flattening the snail itself ruins all posibility of identification, but I'd have never seen the small ones if I hadn't. Any ideas? Note: the circle of the microscopic images is 2mm. The whole thing is at longest 3cm. Thanks in advance, you guys rock. Pun intended.
  23. UI houses rare cephalopods donations, The Daily Iowan, November 2, 2012 http://www.dailyiowa...etro/30671.html The donated fossils were recovered from two limestone quarries in the Independence, Iowa, area five years ago. Related web pages: Black Hawk Gem and Mineral Society http://www.amfed.org/mwf/states/Iowa/BlackHawkGem.html University of Iowa Paleontology Repository http://geoscience.cl...iowa.edu/paleo/ http://nmita.iowa.ui...lnOverview.html Best wishes, Paul H. Note: I corrected the Blackhawk URL in response to fishguy's comment.
  24. Cherokee Group Plant Fossils`

    I found these plant fossils on a roadcut along the mississippi river in iowa last month. Any clues to their identification?