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  1. Jeffrey P

    Western Adventure Part 6

    One week fossil collecting trip out west, my sixth time in the past six years. Flew into Denver. Rented a car and headed down to Castle Rock where I spent the night at a motel. Next day drove up to Florissant Fossil Quarry. It was Wednesday and they're normally closed during the week in September, but I made special arrangements for a few hours visit. Compared to my two previous visits there, didn't do as well. The other times, I was there for the whole day, this time was just for three hours, and they had had a considerable amount of rain recently and so the shale was more crumbly and more di
  2. Hello! I am trying to clean this beautiful mosasaur pictured below, but I am really struggling with some old paleobond thats already been used on it. I have been somewhat successful with using a liberal amount of acetone on the bone, which I scrub in with a toothbrush. This has worked, but there are certain regions where the the glue was used on gypsum crystals and model clay, which has effectively cemented the bones of the lower jaw together. I've also been using a regular paleoarrow. My goal here is to get it as clean as possible, NOT to specifically separate the nat
  3. Slow Walker

    2ft by 2ft Plesiosaur pelvis

    Was wondering which plesiosaur species it might come from. Pierre shale sd 2ft by 2ft. It was broken before fossilizing also encrusted in crystals. Some parts are only .5in thin. Wasn't sure if it was worth picking up. It's a complete rear pelvis. Found verts and other leg bones by it. It was facing up like in photo. But not sure which side is which when it was alive. Bottom point is where it attaches to leg. The bottom of the nob on the left also looks like it was attached to something. As it shows cartilage remains. Maybe it attached to other side pelvis?
  4. Slow Walker

    What tooth is this? SD

    Wondering if the species can be ID. Found in Pierre shale SD. Both teeth were touching the pointy bone. Is that a jaw? Also I put a b72 alternative on them but it sometimes leaves a white film on it which you can see in the photos. Is there a way to avoid this? Thanks!
  5. Slow Walker

    Mosasaur tooth. A shed or from jaw?

    The first mosasaur tooth I found in Pierre shale sd. 2in long poorly preserved. Was wondering if it was a shedded tooth or part of jaw? Also what species might it be? thanks!
  6. Slow Walker

    Fossil shell? Or what? Sd

    What could of made this? Thanks! I mostly find mosasaur pieces but never found anything this cool before. Was in a creek so not sure where it came from. But SD Pierre shale formation is around the area. 2in long. I haven't cleaned it yet.
  7. Slow Walker

    5ft spine articulated from what? SD

    Was wondering if this spine is from a plesiosaur or mosasaur. and is it a neck, tail or trunk spine? Found poorly preserved in Pierre shale sd. There are a few ribs there too. The reddish end pic is where I did a clean break form some more of the fossil which is in different jacket. I roughly cleaned this spine but don't think it's worth putting more time into with all the gypsum.
  8. Slow Walker

    From same creature? SD

    Found these 3 fossils 1ft apart from each other at bottom of a hill. Are the 2 vertebrae from the same area of the body as the mosasaur paddle arm bone? What's the chance this is all from same 1 animal? If so I might try looking for where they came from. Is there a technique to removing a side of a hill to find the source? Thanks
  9. Slow Walker

    Skull part or vertebrae? SD

    Found this unusual broken bone in Pierre shale with a vert right by it. Where on the mosasaur body might it have come from? Thanks!
  10. Slow Walker

    Mosasaur femur or humerus? Sd

    Found this big bone with a mosasaur vertebrae near by in Pierre shale. This is the biggest mosasaur single bone I've found. Is poorly preserved and started to weather. Is there enough to tell if it's femur or humerus? I compared it with other mosasaur but couldn't find any that were this round. What species might it be? Thanks
  11. Slow Walker

    Fish skeleton fossil SD

    Found what looks like fish jaw with tooth and skeleton. There are many pieces of this fossil but only showing part with jaw. Was found poorly preserved in Pierre shale SD. Wondering which fish species it might be? Thanks!
  12. Slow Walker

    Ammonite fossil? SD

    Found in Pierre shale in Sd. Might be from a concretion. the 2 parts are not from same creature it seems. Was also wondering what species it could be? Thanks
  13. rawfossils

    Mosasaur Rib or Wood?

    From the Pierre Shale of Fort Collins. Found next to a lot of Inoceramus bivalves not too often you see something like this. I initially believed it was a branch of wood that was buried but I'm thinking it could be a rib bone most likely from a mosasaurus. Any feedback is appreciated just thought someone should look at it.
  14. A little slow in getting around to posting. 2 weeks ago my son and I got back from our yearly trip up north for fossil hunting. Like most years, we haul the tenement on wheels with us to save the crazy costs of hotel stays. We started out for the first 4 days in the Hell creek, digging with Walter Stein of PaleoAdventures. The first day was a little slow with lots of small tumbled bone bits and spitter teeth. Only bigger find was an unknown that I began to uncover, but didnt complete that day. The second day we changed where we were excavating and I
  15. Good evening to my fellow fossil lovers! This report has been on hold for a while, hovering near the top of my paleo-to do list. But to be honest, I haven't been on the forum as much these last few months and I've just sort of kicked the can down the road, pushing it off. Well here we are in August 2022 and I'm a whole year and some change removed from this excursion, but I say better late than never. With that out of the way lets jump into this adventure! I hope you're ready for... The Roadtrip Through Time: Colorado Part I: Pierre Shale In the winter of 2021 I ha
  16. hadrosauridae

    Mosasaur predation marks

    Today I was cleaning the baculites found on the last fossil trip, and found one VERY cool one. This segment looks to have clear and deep tooth holes in it. It is believed that mosasaurs fed on baculites, and the hole sizes would certainly agree with that.
  17. Hello, I have another tricky ID request with no provenance, for this section of a heteromorphic ammonite. Technically I did get an ID and provenance from the seller as a Nostoceras malagasyense from Madagascar, but the preservation looks very different (more grey/white than brown). This was a chinese seller on that auction site who had that generic ID for a variety of pieces so I suspect it isn't accurate, and he couldn't provide more info when I asked. In the past I did ask about this specimen on this forum using seller-provided photos; I was told it looks instead like
  18. Hello, I'm considering picking up this section of Didymoceras cheyennense (I believe living chamber) from the Pierre shale of Pennington county, South Dakota, USA. However I found out that a lacquer layer has been applied to it to accentuate the iridescence. Is this something that can be removed without damaging the ammonite? And would I use something like acetone to remove it? Thank you.
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