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Found 460 results

  1. Mazon Creek ID

    An unknown I found at Braidwood, IL, Mazon Creek material. Forgot scale but about 2" wide and 1" long. It was in a marine area.
  2. Pennsylvanian Crinoid from Arizona

    Any idea what these silicified possible crinoids are? Are they even crinoids? They are from the Pennsylvanian Naco Formation from near Payson. The ones in the photos (both sides are shown) are from 0.8 to 1.5 cm wide. @crinus These two references might be of help. Anyone have access to the photos from these? Webster, G., & Olson, T. (1998). Nacocrinus elliotti, a New Pachylocrinid from the Naco Formation (Pennsylvanian, Desmoinesian) of Central Arizona. Journal of Paleontology, 72(3), 510-512. Webster, Gary; Elliott, David. (2004). New information on crinoids (Echinodermata) from the Pennsylvanian Naco Formation of central Arizona. The Mountain Geologist. 41. 77-86.
  3. Jacksboro Texas Plants

    I showed Jeffery P the Jacksboro spillway on his swing through Texas and it was my day to find plants in this otherwise marine site. At least I think that both are plants. First this piece with mm scale which I'm guessing could be Cordaites or Artisia pith. Edge view and close-up and other side Next this leaf which I think is one of the seed fern pinnules, also with mm scale other side end views and side views Does anyone agree and can you tell which of the seed ferns this could be?
  4. Edestus teeth

    From the album Sharks and fish

    The shark relative is genus of eugenodontia holocephalid from the Carboniferous-Pennsylvanian age Anna shale formation, Carbondale group, found in different Illinois coal mines. I dont know(yet)which mine these were found in. This unidentified species is of the "vorax-serratus- crenulatus-heinrichi" or "E. heinrichi group", with the teeth being more of a standard triangular shape, as opposed to being thinner and pointed at a forward angle as in the "E. minor" group http://www.thefossilforum.com/applications/core/interface/file/attachment.php?id=501751
  5. Crinoid Cup and Arms

    From the album Mineral Wells, Texas

  6. Crinoids

    From the album Mineral Wells, Texas

  7. Crinoid

    From the album Mineral Wells, Texas

  8. Crinoid in matrix

    From the album Mineral Wells, Texas

  9. Crinoid in matrix

    From the album Mineral Wells, Texas

  10. Trilobite

    From the album Mineral Wells, Texas

  11. Trilobite

  12. I was a lucky recipient of a wonderfully CRAPPY package from @Nimravis a couple of months ago. Now I need some educating. 1. The only recognizable inclusions in this coprolite are plant fragments, most of which appear to be woody debris. There is one relatively intact "leaf?" that may be recognizable to some of you experienced Mazon Creek folks. My educated guess is it is from a lycopod. Can anyone confirm this. From what I have read, the only herbivores large enough to have produced a mass of this size are Arthropleura, the giant millipede arthropods. How exciting is that!?! 2. This one looks like some sort of stem fragment. Would this be from a lycopod as well?
  13. I need some more help getting the right name for some pieces of goniatites from Jacksboro. I think these are the same because of one similar feature in particular. I would like to be sure since these will be with the rest of my Jacksboro collection in a temporary display at the Heard Museum in McKinney Texas dedicated to amateur collecting. These range from 20 to 50mm in size. The whorl is somewhat compressed with a rounded venter and faint tubercles on the umbilical margin especially on the smaller ones. The sutures are not complete enough for a good ID based on that. You can see transverse, flexuous lirae here and here and longitudinal lirae somewhat like "Agathiceras" seen last as I rotate it through in these three views here producing a cross-hatch pattern visible here
  14. Pennsylvanian Goniatite from Texas

    I'm having trouble getting the right name for this tiny Goniatite from Jacksboro Texas. Upper Pennsylvanian, Finis Shale Member of the Graham Formation. Small at only 7mm.
  15. My dad and I recently took a trip to collect plant fossils at two locales near Centralia, PA. Given that St. Clair is no longer accessible to collecting, we found that this area offered the next best option for collecting similar fossil ferns. We came away with a lot of large samples of Calamites sp., including several pith casts that just fell out of the rock. We also found a fair amount of Annularia, Neuropteris, and Pecopteris. Here are only a few of our best finds. I hope you enjoy. If you disagree on an identification, please let me know; I am still trying to identify everything. Some Neuropteris from Centralia What looks to be the bark of Sigillaria
  16. Pennsylvanian Plant Identification

    I collected at a deposit yesterday near Locust Gap, PA and came back with several plant fossils, including this unknown bark. My initial thought is that it of calamites sp. but the gap between the striations is much larger than what I ordinarily associate with calamites. The first two photos are of the unknown bark and the third photo is of what I know to be calamites. I hope you can see the difference.
  17. Paleozoic Adventures in Arizona

    Here are photos of two trips taken to look for Paleozoic fossils in northern Gila County in northern Arizona. Daily thunderstorms and plentiful shade made the 90 deg. + temperatures bearable. I ran into TFF member ArizonaChris while in the area. In the Martin Formation I found interesting stromatoporoids, now determined to be sponges, that were important reef forming organisms during the Late Devonian. Pine needles for scale. Here are some silicified Martin Formation brachiopods. Nearby are many caves and sinks in the fossiliferous limestones of the Martin and Redwall Formations: up to 100 miles of passages according to a caver. The first one is full of junk metal including two cars. Any idea what the cars are? Here is Tin Can Sink. To be continued.
  18. Today turned out to be a good day to go through Linton Cannel Coal. I haven't searched the fossil coal in a while. Just for fun, I was looking through some blocks when I spotted a shark spine buried in a thin layer of spore cannel. Usually when I split the coal, I use a knife, but this piece was so thin and fragile I decided to blow of the layer with an air nozzle. When I did this, not only did I see a spine, but nearly a complete Shark was there. Typically the size of the coal block limits the fossil size. Today's fossil Orthacanthus compressus was missing the head and the tip of the tail. Sigh. This shark is from a coal mine in SE Ohio. The coal is Upper Pennsylvanian in age (300 myo). I have included a sketch of what an Orthacanthus may have looked like.
  19. Pennsylvanian Shark Tooth

    Anyone know what this Pennsylvanian (Desmoinian) shark tooth from Arizona is? The tooth is 40mm wide and 30mm from top of tooth to bottom of preserved root. The shape of the tooth suggests that it was a shell crusher. Thanks, John
  20. Pennsylvanian footprint

    I bought this fossil the other day, a Pennsylvanian amphibian or reptile print from Alabama (Carbon Hill). I have a fern fossil from the same site. I'm going to try and mount it to my wall if possible. Maybe put a wood backing with silicone glue, as it is fairly thin.
  21. Pennsylvanian Nodules

    We went up to Terre Haute, IN for a wedding this past weekend. I was looking forward to us being able to actually hunt for some fossils of our own as I had read online about Fowler Park/Griffin Bike Park and its nodules. I decided to check out the park rules after we got up there and lo and behold, Vigo County doesn't allow fossil collecting. I didn't want to set a bad example for my daughter so we refrained, much to our dismay. On the way home we stopped at an antique mall and happened to find someone selling jars of split nodules! So, we didn't come home empty-handed after all. Below are the better pieces that were in our jar. I used this guide and decided we had some pecopteris and macroneuropteris, but I'm not sure what all of them are, especially the blobby thing on the upper right. See detail photos of blob.
  22. Schnebly Hill Fm. plants

    What are the plants in the photos from the Pennsylvania/Permian boundry from the Schnebly Hill Formation near Payson, Arizona that I am linking to my Arizona Paleontology Guide? Photos are from geology teacher Stan Celestian and were not found by me. (I'm going to look at the location for plants). Thanks, John 1 Annularia? 2 Fern type? 3 Fern type?
  23. Possible fossil ~ any ideas?

    Hello everyone! I hope the summer is treating everyone well. Here in Chicago it has been either great storms or brutal heat. I have had very little time or ability to get out but last week the weather evened out I got to do some exploring. I always head to areas where water has flooded and uncovered fresh places to look. Last week I found the item pictured below just siting on the surface. The shape caught my eye and it made me think of a nautilus-type shell. The ridges follow all around the surface of the "shell." This was found on the DuPage river about 25 miles West of Chicago. We are just in the edge of the Slurian area but just east of the Pennsylvanian region. When consulting online guides for Illinois, this looks like an incomplete endolobus shell. Any ideas? Thank you for your time and help!
  24. Sponge

    Red chert radial sponge from the Pennsylvanian Naco Formation found north of Payson, Arizona. NB. Pennsylvan is a subperiod, epoch is Late and age is Moscovian. (Desmoinian under old system.) Dilliard, Kelly & Rigby, J.K.. (2001). The new demosponges, Chaunactis olsoni and Haplistion nacoense, and associated sponges from the Pennsylvanian Naco Formation, Central Arizona. Brigham Young University Geology Studies. 46. 1-11. geo_stud_vol_46_dilliard_rigby.pdf link
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