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Found 14 results

  1. There is an isolated exposure of the Morrison formation nearby the area I have visited to hunt fossils the last few weeks. The shape is an elongated oval and measures 1.15 km wide X 3.75km long. This image is a small section of it. My question is this: Would it be worth exploring, scouting, hiking this area for invertebrate fossils? It is on BLM public land but keep in mind that vertebrate fossils are strictly off limits for collecting. The only reason I would even consider visiting it would be to hunt for invertebrate or plant fossils. The majority of the area surrounding this "island" of Morrison formation is Cretaceous period with the Juana Lopez Member of the Mancos Shale where I'm finding 4 species of ammonites. In my mind the old adage : when on a fox hunt, don't stop to chase rabbits...seems to apply to my question and for that reason I have yet to visit the Morrison formation spot. This case the fox is Ammonites and the Rabbits are dino bones, teeth, etc. It could be anxiety causing at worst and finding some nice invertebrate fossils at best. The anxiety being walking right past exposed bones, carnivore teeth, etc... which I wouldn't touch nor even photograph. The temptation to share would be another facet of the anxiety. Like - "Wow! I found Allosaurus teeth this weekend at ________ down in the Utah desert!" Wiki says this about the Morrison fm fossil content : Along the rivers, there were fish, frogs, salamanders, lizards, crocodiles, turtles, pterosaurs, crayfish, clams, and mammaliforms. The dinosaurs were most likely riparian, as well. Hundreds of dinosaur fossils have been discovered, such as Allosaurus, Ceratosaurus, Torvosaurus, Saurophaganax, Camptosaurus, Ornitholestes and several stegosaur species. A satellite view of a section of this Morrison fm "island"... The Junipers are probably 10 to 15 feet tall and a similar diameter.
  2. rocket

    7606_Acanthochirana_n

    From the album: Fossils from the Plattenkalke of the Altmühl Valley

    small prawn Acanthochirana, I am unsure about it if is an angulata or not. Overall lenght is approx. 8 cm, shows remains of the long antenna. Eichstaett, Blumenberg, found 1970 edit: Acanthochirana cordata is for sure now
  3. rocket

    8426_Acanthochirana_n - Kopie

    From the album: Fossils from the Plattenkalke of the Altmühl Valley

    UV-Pic of a small prawn Acanthochirana, I am unsure about it if is an angulata or not. Overall lenght is approx. 8 cm, shows remains of the long antenna. Eichstaett, Blumenberg, found 1970 edit: Acanthochirana cordata is for sure now
  4. Marco90

    Gryphaea dilatata

    From the album: My collection in progress

    Gryphaea dilatata Sowerby, 1818 Location: Villers-sur-Mer, Normandy, France Age: 163-157 Mya (Oxfordian, Upper Jurassic) Measurements: 7x7x7 cm Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Pteriomorpha Order: Ostreida Family: Gryphaeidae
  5. Marco90

    Lycoptera davidi

    From the album: My collection in progress

    Lycoptera davidi Sauvage 1880 Location: Western Liaoning, China Age: 150 Mya (Upper Jurassic) Measurements: matrix 13x6 cm, fish 7,5 cm long Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Superclass: Osteichthyes Class: Actinopterygii Superorder: Osteoglossomorpha Order: Lycopteriformes Family: Lycopteridae
  6. I’m wondering if these two teeth (both are from the Morrison Formation in Moffat County, Colorado) have been identified correctly as Allosaurus and Marshosaurus. Here are the measurements of both: Allosaurus: 4cm long serration count is 10/5mm on anterior and posterior carinae base length is 21mm and base width is 13.5 mm (note from dealer: Please note that the base of this tooth is broken and the transition of enamel to root is not present. The base measurement may have been larger.) Marshosaurus: 4cm long serration count is 18/5mm on anterior and posterior carinae base length is 15 mm and base width is 8mm (note from dealer: Please note that the base of this tooth is very near the enamel to root transition a represents a fairly complete tooth.) The serrations on the anterior keel of the tooth extend two-thirds of the distance from tip to base. Images seem to be weirdly mismatched, but I think it’s pretty easy to tell which pictures match with which.
  7. I recently purchased a Theropoda indet. tooth from the Lourinhã Formation of Lourinhã, Portugal. I wasn't expecting much initially since it looked like an incomplete tooth and the seller tends to go the safe route with their IDs if it's too vague. But, the serration count was similar to that of the Marshosaurus-like megalosaurid teeth based on @Troodon's guide on the dinosaurs of Portugal. Maybe it's just wishful thinking, but I wanted to see if anyone else had some input before I slap that good old theropoda indet. label on the display. The distal serrations is split down the middle. Mesial serrations were kind of hard to count, but they are at least 20/5mm, the distal serrations are 16/5mm. Not sure if the split serrations are messing with the count, but it should be around that 16/5mm after counting it multiple times with various pictures. I don't know how much further the tooth would have gone had it been complete, but I think the mesial serrations do appear to end before reaching the base. Although I don't know if those serration densities still overlap with other theropods like Allosaurus. Split distal serrations and shape of the base which could be slightly off due to the split serration. Distal serrations. Mesial serrations. Mesial serrations ending? Close up on denticle shape on distal side.
  8. Hi all, In continuation of Ludwigia's topic I'll show you another example of "fossil biking" along with some info on Moscow fossils. There's a dozen of spots within the city limits where you can at least try to find some fossils, one of them being Fili Park . It's an Upper Jurassic formation, similar to the one described here as in those times Moscow region lied on the bottom of the same shallow sea as the Volga basin. The difference is that in Moscow Upper Tithonian (Volgian) is better represented. The quality of the finds is unfortunately much worse. Fili Park is situated on the right bank of river Moscow (Moskva) not far from the city center. Its a narrow band of forest with a steep slope towards the river. The pace is well-known among Moscow paleontologists to the extent that somebody said "everyone starts with Fili". I did not start with Fili and actually learned about its existence (fossil-wise) not long ago. I was surprised that you could easily find Jurassic material near the center of the megapolis (something along the lines of fossil hunting in NYC Central Park) and the fact that ammonite nacre was well preserved. I decided to give the place a go. And use a bike as the fossils spots are a long walk from the entrance. Here Fili district is outlined in red.
  9. Hello everyone! I just received a dinosaur vertebra from the Upper Jurassic of Cambelas, Torres Vedras in Portugal, and I was wondering if it would be possible to identify it any further than "dinosaur". Perhaps @Troodon and @LordTrilobite could give their opinions? Here are some photos: Side photos: Top/bottom photos: Thanks so much for your help! (And thanks to @Vieira for the fossil!) Monica
  10. Nimravis

    Jurassic Ripple Marks??

    I have had these and others in my collection for about 27 years, most of them have been wrapped up or still are wrapped up since I collected them with my son. I always classified them as Ripple Marks, but wonder if they are, we collected them a little to the West of Sundance, Wyoming in exposure that is supposed to be from the Upper Jurassic / Morrison Formation. What is your opinion?? Top of Plate Bottom of Plate
  11. Jaimin013

    Allosaurus sp.

    From the album: My Collection

    Allosaurus sp. Morrison Formation Upper Jurassic Moffat County, Colorado Size: 6cm
  12. Jaimin013

    Diplodocid (?Apatosaurus) sp.

    From the album: My Collection

    Diplodocid (?Apatosaurus) sp. Morrison Formation Upper Jurassic Moffat County, Colorado Size: 6.5 cm
  13. belemniten

    Acrocoelites rauri

    From the album: Holzmaden

    A Acrocoelites (13.5 cm long) from the quarry Kromer in Holzmaden.
  14. belemniten

    Acrocoelites

    From the album: Holzmaden

    Fossil: Acrocoelites Location: Quarry Kromer in Holzmaden Age: lower Jurassic Size: 11,2 cm long
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