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Found 249 results

  1. We completed our first trade on the fossil forum recently and it was awesome. We got a great fossil and a cool new friend. I am putting up one of my Stethacanthus altonensis teeth because I want to bulk up our shark education program just a bit. It is really the only tooth we could trade that has much appeal. Here are the details on the teeth we have to offer. I actually think this one of our anvil shark teeth. This one is smaller but has the tip intact. The details Stethacanthus altonesis Delaware Creek Member-Caney Shale Formation Mississippian-Meremacian Pontotoc County, Oklahoma We can also offer some trade filler too but none of it rare or anything. PM if you want pictures of these teeth. 2 Isurus planus teeth from Sharktooth Hill Miocene 1 Ptychodus whippeli from Texas. i have no other information about the tooth. 1 Cretaceous Shark indet tooth from New Jersey ( I think). Scapnorhynchus was the leading opinion when it put it on the TFF for ID. It was not a unanimous opinion though. We are looking for specific things to fill in our education presentation about sharks. Astercanthus teeth and spine. Any Hybodont shark would work but in a perfect world we find an Astercanthus sp. Caseodus tooth Campodus tooth Cardabiodon tooth Feel free to say hello if you are interested. In pic 3, the trade tooth is on the right.
  2. This is a new one for me. A neat little button-like horn coral: Dipterophyllum glans from the Middle Mississippian Burlington Fm. of Iowa. Didn't know which forum to share this, so I thought I'd drop it off here for posterity (scale in mm)
  3. My son and I are doing our first Shark Adaptation classroom education program in March. We are using fossils from across the timeline of sharks to explain to the students how sharks have managed to stick around this planet for some 430 or so million years. I am very proud of the relatively small fossil shark collection we have. The kids will get to see and in a lot of cases handle some fossils from badass sharks. I thought it would be fun to put some of that collection and bits of the information we present. Eventually I will include the art work my son is producing. He is 5 months away from graduating high school so I limit his time on this art while he works his final art projects for school. The first shark we cover is also one of the most fun for me. The Cladodont sharks are pretty cool and as I recently learned present a perfect opportunity to utilize them in two different spots in our presentation. They start off the program because of Cladoselache. They were not the first shark but they are the basic design for sharks that would be recognizable to 3rd and 4th grade students. They had body type that modern sharks use and they had some fearsome looking teeth. They may be really small teeth but they were deadly if you were a small fish. Science thought these little sharks went extinct during the Great Dying but in 2013 that theory was proven wrong. There were Cladodont teeth found in France that dated to 120 million years ago. They survived the Permian by moving to deeper waters. The small shallow water sharks apparently became very successful as smaller deep water sharks. The physical adaptations are important but the adaptive behavior of sharks is a huge part of how sharks have survived for so long. We only get a few minutes on each shark so that is the basic stuff we will tell the kiddos. Here are the teeth. Pic 1- the unidentified Cladodont tooth. I love this tooth. It is one of my favorites. Under the micro eye, it looks so freaking cool. It could be a Symmorium. It could be something else. It might even be something new. It is from Russia and dated to 320 million years. This will get donated for research at some point. Pic 2- Cladodus belifer. A Mississippian tooth from Biggsville Quarry in Illinois.
  4. I decided to take the day off of work today because it was supposed to be in the mid 40's and I figured I could whack open some Mazon Creek concretions. I was very nice out, but I figured that my time would be better spent cutting down matrix on a number of pieces that I collected recently from 3 different time periods (Pennsylvanian, Mississippian and Ordovician). I did not get everything cut down, but it was a good start, here is the aftermath. Pennsylvanian- Sometimes things just pop out of the matrix like the two beauties Ordovician- Mississippian-
  5. what are these circles on this brachiopod

    I have a strophomenata brachiopod with small circles and what look like puncture holes in center of circles. What may have caused these?
  6. Leptaena

    I collected this Leptaena brachiopod from the red brown mudstone resting three feet above the top of the first out crop of breccia limestone. The location is above the rest-stop on highway 89 S before Riceville Rd. The formation is the lower part of the Kibbey. Leptaena Brachiopods dominate along with three types of bryozoa and crinoids. Also found clams and a part of a plant fossil. The setting was once a lagoon.
  7. Hopefully this will be quick and easy for those who have the knowledge. I was meandering in the hills and came across some horn corals. I am used to calling the smaller one on the left a horn coral. I am presuming the one on the right also a horn coral. Would someone kindly provide sufficient naming to each so I can do some offline research and reading? Apologies for fuzzy pic. Camera seemed to only want to focus on the backdrop material.
  8. USA Brachiopoda ID

    Dear USA Brachiopoda enthusiasts, Could you see these images please? What is your expert idea about ID? I know that could be difficult from images. Thank you for any help you can offer. Ricardo
  9. A daylong venture into the back canyons of the Sacramento Mountains to look for minerals and fossils. From the trailhead & back was just under 9 miles and lots of rock scrambling through Ordovician-Pennsylvanian formations. A dryfall requiring a climb around Overhang with rippled sandstone floor having iron concretions A view back down hill partway to summit Horn corals Maybe coral?
  10. Today I stopped at a favorite roadcut near Vienna, Illinois at the intersection of I-24 & 146. This site contains Mississippian Fauna of the Chester Series / Upper Chester Group / Menard Limestone. Here are some of my finds- Pentremites spicatus Blastoids- (the larger 2) Archimedes screw and Crinoid Stem- Crinoid Basal Plates- Agassizocrinus (?) Brachiopods- Horn Coral- Fenestella Bryozoan- Hash Plates-
  11. I was surprised to see this specimen for auction and pleased to win it. It's Anguloserra thomasi, a rare tooth from an ophiocistioid echinoderm and comes from the same locality as the holotype described here (abstract only): Haude & Langenstrassen 1976. I've been interested in these since finding three similar specimens in the UK that took a while to identify - shown in the next post. It's preserved as an impression - most material in this matrix is decalcified. Carboniferous, upper Mississippian, Culm beds (equivalent of Brigantian and Arnsbergian beds in UK), Aprath, Germany. Scale in mm. Here's the holotype from the linked paper (a latex cast):
  12. I have jokingly told people there are literally trillions of crinoid column fragments in this area but I have only found bits and pieces of the crowns. On Christmas Day, while hiking with my wife, I found what I think may be a potential crown in a rock having lots of column fragments. Thus, my request for some substantiation of the possibility. If this is a crown, I will go back to try and field extract just the portion of this rock having the specimen. I think it would be a good one as a 1st experience for exposing/prepping to reveal more of the fossil. The width of the specimen is just at 2"
  13. I found this one on a small piece of matrix with Blastoid also on it. Found in sulphur Indiana today
  14. Coffee and Crinoids

    While visiting family and high school buddies over Christmas time, I was able to schedule a long awaited meet and greet with Tri State native Dom (Fossil Claw) and made a hop over to Indiana for some Mississippian action at dawn. Fortunately the first morning rays revealed undisturbed, fertile ground free from the scratchings of eager collectors. The ground was frozen and frosted over in the 27F air, so we donned gloves and knee pads for a low and slow peek into the long shadows. A couple Pentremites blastoids surrendered their crowns right away. When Dom asked if I was moving along too fast, “Holy smokes!”, or thereabout, was my response as I pointed in disbelief at a nice crinoid crown poking out of the clay at me. The crown looked fragile, and after a short conference, Dom offered up the best idea to free it from the frozen clay: hot coffee from his thermos. The stream of joe melted the mud away like butter, and I carefully wrapped it up in my knit hat for safe handling and travel. A steady stream of blastoids punctuated the hour of so we spent canvassing the outcrop. Then I dropped to a lower level bench for a fresh crawl. I was shocked to lay hands quickly on a second crinoid crown, then a limestone slab with 2 shark teeth, or fragments thereof, poking through. With a continued parade of blastoids, including some multislabs, we decided to leave some for the next guy and headed home to check out Dom’s collection. This was a great first get together with a fellow collector.
  15. A while ago, I was convinced that this was an orthocone with possible sponge borings though it was never really resolved. http://www.thefossilforum.com/index.php?/topic/77979-strange-infestation-on-orthocone-shell-mississipian-ne-england/& @Al Dente suggested eurypterid as a possibility which I argued against, largely because they've never been found around here. However, a friend of mine has now found some undoubted eurypterid fragments in equivalent beds in Scotland, 120 miles away or so and where the faunas have much in common. He's pretty sure that this is indeed eurypterid (based on just a couple of closeup photos). I'm rather hoping it is though the boring sponge is also pretty interesting. Searching throws up Adelophthalmus as a distinct possibility, based on the ornament (see reference and drawing at the bottom of the post). So here it is again - eurypterid or bored orthocone? Brigantian (Mississippian) marine shale, Co. Durham, NE England. (Many more photos on the original thread, including very close up. The little rings are preserved in solid pyrite and go right through the shell/carapace.) From this paper on Pennsylvanian Adelophthalmus https://www.foss-rec.net/8/3/2005/fr-8-3-2005.pdf
  16. Hi, while on a walkabout for crinoid calyx found this particular formation having what seems to be a branching bryozoan fossil. This particular formation seemed to be quite full of fan type corrals as well as what I think are branching bryozoa (most in the length of 4"-6"). This one was about 4" long. Would someone kindly confirm the fossil type or please guide me to a correct naming?
  17. Fossils in Kentucky

    Hi, I'm visiting my niece who just had a baby, in campbellsville KY. I noticed there are a lot of very ancient fossils in Kentucky. Does anyone have any sites or road cuts to explore? Thanks alot, this is my first post. Stuart
  18. Does anyone have any information on the roguse corals found at the Fern Glen formation? I can only find one but the ones I have found there look nothing like the one in the photos. Mine all look like the "normal" tornado shapes. The Fern Glen is Mississippian. Here is the photos I'm talking about Amplexus sp. http://www.lakeneosho.org/Miss48.html I just did a prep on one (maybe my best prep yet) it's just a common and not even a good specimen, but I tried some different techniques. I'll post it tomorrow after everything dries and sets in. It turned out better than I thought but I will welcome critiques.
  19. The first is from the Menard formation the last two are from the Golconda fromation. https://imgur.com/a/8g5R86m I've been away for some time (life keeping me busy). I have a brand new prep room soon I will have other photos of my room and various fossils and rocks. Members that have been around awhile might remember me and to all you new folk I want to say hello (maybe I should have started with all that). Anyway I hope to be able to get back to posting again since things are starting to settle in.
  20. I spent a few hours fossil hunting on two separate trips on Forest Service land in Montana. The first trip was this past spring looking for Late Oligocene - Early Micoene flora about 90 minutes outside of Missoula. The second trip was during at stint over the summer at a fire lookout tower in the Flathead where I spent just a few hours one morning looking at Devonian and Mississippian marine layers. Besides the obvious, the trips were quite different. The spring trip was a drive to a road cut on a Forest Service road while the summer trip was a seven mile hike in. Additionally the medium is completely different; flakey, brittle shale compared with big, blocky limestone. You can keep non-vertebrate fossils as long as you don't plan to sell them. Prior to heading to an area, I look through publicly available research, lectures, field trips, etc. to find possible localities. I only found limited information on possible identification of the Late Oligocene - Early Micoene flora and most of if was unpublished graduate work from a nearby site with only some overlap on species. Please feel free to correct any id's or throw new ones out! I believe these are cercocarpus, a mahogany.
  21. Hello! New to the forum and plan to introduce myself properly later- I've spent a lot of time hunting in Southern Indiana near Bloomington and at the St. Leon cut- going to Indiana Caverns tomorrow and wondering if there's any spots nearby to hunt for fossils. Spatial reasoning is not my forte- if anyone has specific directions to a great spot I'd be so grateful! On break from teaching art to my high school students- would love to make some great finds over my break to show my kids
  22. Mississippian trilobits

    I recently came across some "old" fossils I found a few many years ago, which included some slabs of fossils from the Imo formation in Van Buren County, Arkansas. The site is an abandoned phosphate mine known as the Peyton Creek site. It is about 0.5 miles east of highway 65, and there are also some exposures of the same rocks along the highway roadcuts nearby. The Imo is upper Mississippian and is sometimes included as part of the Pitkin limestone. It is apparently an outstanding site for cephalopods and ammonoids, but I didn't know that back then. The slabs contain several small trilobite pygidia, and below is a photo of the best one (about 5mm wide) along with a couple of others (now you have to look for them ). I was going to post here to see if I could identify the genus and possibly the species, but I think I found my answer already. I decided to post anyway, as a reference and to hopefully confirm the id, although I doubt the pygidia alone are enough. I believe this is Paladin imoensis, as I just discovered that the holotype was collected from the same abandoned quarry.
  23. Longtime lurker here. As my first post, this will be a trip report about mine and @UtahFossilHunter 's attempt to find the rumored fossils on Stansbury Island in the middle of the Great Salt Lake. The island isn't quite known for having fossils but the rocks are the right ages for this area. First, we consulted a geologic map of the area we wanted to look through. We used this map from a dissertation of a student at the University of Utah. We decided to go to the undifferentiated Mississippian this time. We had gone out to the area a few times. We had gotten skunked on the Ordovician Garden City Formation and undifferentiated Cambrian in early February. Although, it had a nice view so the hike wasn't for nothing. Both of those formations were empty of macrofossils. (Microfossil analysis coming soon!) So we went to an adjacent valley where a grassy hill sat where the undifferentiated Mississippian would outcrop. We saw a outcrop of phyllite but staying hopeful, we hiked to it looking for any fossils. At the outcrop, I flipped over a rock from one of the beds. Lo and behold, at last, some fossils, albeit slightly metamorphosed. This layer and only this layer is filled with bivalves and brachiopods. We grabbed some sizeable chunks and made are way out. Stay tuned for more progress on research here.
  24. Brachiopod Imprint?

    I found this rock in a middle Tennessee creek. (Mississippian, St. Louis Limestone & Warsaw Limestone) I thought it had a brachiopod imprint, but haven’t seen one with such a deep, almost rectangular indentation on one side. Any thoughts?
  25. Coral or Sponge?

    I found this little rock in the creek that borders my property several weeks ago. (Mississippian, St. Louis Limestone & Warsaw Limestone) For some reason, it is one of my favorite finds thus far. Is it a brachiopod embedded in a piece of coral or sponge?