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  2. Let's see your latest mailbox score!

    Got one very amazing fossil in the mail today, quite a rare piece which I didn't think of ever owning. It's an Arthropleura armata body segment found in the Silesia Coal Basin in Poland (Upper Carboniferous, Middle Pennsylvanian / Westphalian A - Rudzkiebeds around 315 - 310 million years old) Definiatly one of my favorite and rarest fossils to date.
  3. Hey everyone - It's Christian. For the past few months, I was inactive on TFF as I had a lot of schoolwork.. But now, I've got a lot more time on my hands - which means that I can get back to all things fossil related This of course includes making preparations for my 3rd Møns Klint Fossil Excavation (MKFE - the fieldwork aspect of my Møns Klint Fossil Research Program). I'll be going for 2 weeks, in mid-August - I'm really excited! As I said in a post from a few months ago, the collection policy of this MKFE is essentially the same as last time's (cephalopod, crustacean, echinoderm and vertebrate material). This time, though, there'll be a bigger focus on articulated and/or associated material - eroded sea urchin spines and belemnite fragments are getting too numerous... On the first days of the field trip, I'll have to do quite a bit of prospecting for new sites to work at, because there's a chance that the landslide spoil heap from last year has most likely been washed away by the waves. I'm already having some ideas of particular projects for this field trip, which include a comprehensive collection of washout microfossils - to determine relative abundances of various faunal groups. Another project is the in-depth analysis of fossil material from different layers of chalk - which I hope will yield some zone fossils. Of course, I'm still hoping to find a lil' mosasaur tooth I'll also use this field trip as an opportunity to donate to the GeoCenter Møns Klint some of the fossils I found during the 2nd MKFE. I'll keep you guys posted! Stay tuned I'm so excited to getting back there! -Christian
  4. Hi Dan, sure - please PM me the pictures and we will discuss further Regards, Kasia
  5. Fossil of alien tooling?

    I guess it's a crinoid... learn something new everyday.
  6. Fossil of alien tooling?

    A very nice dissolved out crinoid.
  7. Today
  8. great finds, the fauna is very simmilar of what we found a week ago in our area.
  9. nice orthocones
  10. Unusual Tiger Shark Tooth

    Daryl, I would say that it is a G. mayumbensis. Kent didn't list it in his Calvert Cliffs volume published last year but it appears your find is on a level of extreme rarity. Elasmo.com has a frequency scale for teeth with the rarest teeth listed as what might be found by several people in a year but I believe there is a level of rarity beyond that. It would be a tooth that one person might find one or two of in a lifetime and that's where I think you are with those two teeth. The Calvert Cliffs yield teeth of Middle Miocene age so they aren't too old for mayumbensis and the occurrence that far north for a tropical shark is not without precedent. There were likely unusually-warm summers in the Early-Middle Miocene just as there are today (and keep in mind that time was the second warmest in the Cenozoic Era - second only to the Early Eocene when there were crocodiles and palm trees on Ellesmere Island) so a tropical shark could have ranged farther north from time to time. On my coast hammerhead sharks are known off Baja California but during unusually-warm summers they have been reported off San Diego. It would not surprise me that in coming years they will be seen off Los Angeles and even Santa Barbara. Jess
  11. Unusual Tiger Shark Tooth

    Paleoc, I have been researching mayumbensis for the past couple of days though I am on the road and away from my references at home. I have not been able to confirm that it occurs in the late Miocene. It is known from the Peace River and the phosphate mines in Florida but only from the lower part of the Bone Valley Formation according to a longtime collector of the Bone Valley. He has also seen it from the Gainesville creeks (also noted by several members here with photos) which yield mostly Middle Miocene marine vertebrates and some younger land mammals. If you have a reference listing a late Miocene site or have collected one, I'd like to hear about it. Jess
  12. Hello! Unfortunately I do not have any Chama calcarata (punctata) or Chama lamellosa but I do have some Chama lamellifera from the Micoene of Victoria, Australia if you are interested?? Thanks, Dan
  13. Are these Galeocerdo Mayumbensis?

    My friend has a tooth that might be a symphyseal or at least the position next to it. I'll see if he'll let me get and post a photo. I edited my previous post to include a comment that the distal cutting edge of the cusp is shorter in G. mayumbensis than in cuvier. It leaves the cusp looking more broad-based with the effect of adding more surface area to the labial and lingual faces because of the higher cusp angle. I haven't seen what a lateral to posterior position would look like. My friend has a few specimens from the Peace River. A couple of them are mayumbensis but a couple of others (laterals) look like cuvier. Unfortunately, you can get both mayumbensis and cuvier there because the lower and upper Bone Valley layers are exposed by the river. I would think the cusp angle would decrease toward the commissure and the overall width would increase to the point that the tooth would look like a cuvier. Jess
  14. Fossil of alien tooling?

    +1 for the cast of a a crinoid stem.
  15. Fossil of alien tooling?

    My first thought is also crinoid, too big for blastoid I think (but I am not an expert)
  16. May 2019 - Finds of the Month Entries

    Wow... that’s outstanding!
  17. May 2019 - Finds of the Month Entries

    This is the before picture, still attached to the host rock. A small part could not be found so Markus flipped it and did a ventral prep on it. Lucky thing too, otherwise wouldn't have found the eggs!
  18. May 2019 - Finds of the Month Entries

    Edited original post now. Those are the eggs.
  19. May 2019 - Finds of the Month Entries

    Wow, what a beauty! I’m curious, what is the significance of the two circled parts?
  20. Potential dinosaur teeth (but probably not)

    The first is without question wood. The second is a bone shard, can't see it well enough to say mosasaur but its possible.
  21. I wonder if there is something better than resin to use: I don't imagine resin is in any way reversible, something fossil conservators value these days. I don't think Super Glue is easily reversible either but maybe it doesn't react with those minerals like resin does? I don't know about bringing out the colors either, but for consolidation purposes at least, it's usually Paraloid/Acryloid (for reversibility) or Super Glue/Crazy Glue that are recommended. But only if it's needed.
  22. May 2019 - Finds of the Month Entries

    Date found: September 5, 2018 Date prep completed May 17, 2019 Name: Triarthrus eatoni Geologic age: Ordovician Locality: Beecher's beds, Walcott quarry, near Rome, NY Quite a story behind this one. In the late 1800's Valiant discovered this quarry, later, Beecher started scientific study of it but Walcott (of later Burgess Shale fame) started to dig only a few feet away. For more detail click here. Fast forward 120 or so years. I got an invite to a paid day digging in this quarry with one of my fossling buddies, Gary V. Markus was a great host and taught us so much about trilobites and how to see them with his x-Ray vision. Gary found a complete bug within the first 5 minutes. I took 3 hours to find my first one. By the end of the day I had managed to find five. Markus' son prepped these for me and I just picked them up yesterday on my way home from the Penn Dixie dig. Two of the five had eggs and one had a 3 part terminal claw (foot?). Wish I could post more than 4 pics here. The circled parts are trilobite eggs. Needless to say there is soft tissue preservation of the legs and antenna as well.
  23. Fossil of alien tooling?

    I agree, reminds me of some silurian stems.
  24. Fossil of alien tooling?

    TFF doesn't do appraisals. Once you know the ID of what you have you could search the internet to see what others value it at. I originally thought this looked man-made because the spacing and regularity of the frills are a little too perfect. Looking from the side, the hole looks like it is a perfect circle. Maybe someone else could give you a more definite ID. I don't know a ton about crinoids. It could be a crinoid column print. Good luck.
  25. Help ID Please

    I don't but I have heard the suggestion that the big ones are likely made by crustaceans. i suppose you would have to find the remains of an owner that died inside to say for sure. I saw where that recently happened with the terrestrial corkscrew burrows but I haven't heard anything about marine identifications.
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