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  1. Hi All, Last week I found this Mosasaur tooth in one of the Brooks in Monmouth County, NJ (Navesink Formation - Late Cretaceous). While in the brook, a guide from the Monmouth Museum was onsite leading a small group of college students. He identified the tooth as Halisaurus platyspondylus. Had a great conversation with the gentlemen as well, so a nice bonus. Another, more experienced individual contacted me after I posted the tooth on a local FB group. He has several similar teeth, and while not completely disagreeing with Hailisaurus, suggested Prognathodon sp. may possibly be a better fit? It's debatable based on conversations he's had with other's more experienced than him. In any case, I figured there must be several Mosasaur experts on here who may be able to weigh in on the subject. Any opinions/discussion is appreciated. I'm still learning, so this is all helpful to me. Thanks in advance!
  2. Hello everyone, first post in this forum! If I make any newbie mistakes please let me know and I’ll edit this post/remember for next time. I have a broken reptile tooth sifted from Big Brook (a stream near Marlboro, NJ) that dates to somewhere between the Late Campanian and Early Maastrichtian. I posted this online at another point and it was identified as a crocodile tooth from the original pictures I posted. I’ve been sitting on this one for a while though and it doesn’t seem to line up with the teeth from other known crocodilians and from this area (Brachychampsa, Borealosuchus, Hyposaurus, etc). Can anyone offer a second opinion? It has really prominent anterior ridge on the front of the tooth which makes me think it’s possible a theropod but it doesn’t look like Dryptosaurus. The back half is broken which means I don’t have any serrations to use as an ID. I’ve included the files in this post. I have also included some bonuses to these image though. I believe I found what appears to be a bird femur in the brook but I’m not certain if this is a quaternary find or actually from the same formation as this tooth. Anyone have a family id or insight on how to check if this is fossilized or just turned black from the soil? I also included some images of saurornitholestine teeth which I personally thought are close in appearance to this tooth. Thinking I might be too hopeful on that ID but thought it was worth sharing my thoughts lol. Material of these dinosaurs has been found in New Jersey!
  3. Hey everyone, I just moved to South Jersey (from North Jersey) a few months back. I love fossil hunting, but I am afraid that I do not know much about the area other than some of the bigger sites or finds (i.e. Hadrosaurus in Haddonfield, the Rowan site). Today, I drove to check out the tributaries around Big Timber Creek in Stratford. While the stratigraphy looked quite nice at a few places, I unfortunately came out empty handed. I work in GIS so I have been following the bedrock with stream layers, but I suspected that I probably should add topology in there! I am hoping to follow the Navesink and Mt. Laurel formations up from there. Anyways, this is all new to me! if anyone had any tips or advice for fossil hunting down here, than let me know! Any advice is greatly appreciated! thank you
  4. Hi, While out fossil hunting with my girlfriend in the Navesink Formation at Big Brook in Colts Neck, NJ, she found this small bone fragment while sifting. It measures about 2 7/8 inches (approx 73 mm) and weights 8.1 grams (but still may contain packed dirt on the inside). It is slightly thicker than a half inch in thickness while laying down. I have no idea what the bone belonged to, and I highly doubt anyone will be able to have much of a certain identification for this, but I promised I'd take a look and see what the Fossil Forum thinks. I can give more measurements and images if needed. Thanks, Aiden
  5. I_gotta_rock

    Cretaceous Micro Brachiopod

    This one is bugging me!!!! I know this is a brachiopod. I found it at the Reedy Point spoils along the C and D Canal in Delaware. It is 1cm in diameter. I have found two of them in the sand but none of them in the books. I have looked in Weller 1907, Wade 1926, Stephenson 1923, Richards 1958 and 64, and Lauginger 1988. I asked the folks at the repository for the Monmouth Amateur Paleontological Society. No dice. Look familiar to anyone?
  6. I_gotta_rock

    Glycymeris Clam Internal Mold

    Glycymeris clams have ridges along the inside edge of the valves that extend past the cardinal area. Internal molds tend to include these teeth, making them very distinctive. As of the time this was posted, this was the only member of the genus listed in the Paleobio Database for the Cretaceous period and it is only listed as being found in NJ. However, Stuart Weller (1907) and Horace G Richards (1958) not only include them in the C and D Canal zone, but identify three different species for the region. This one is the most common and the only one THEY found outside of NJ. This is most likely from the Mount Laurel formation. It was found among the Mount Laurel index fossils. However, Navesink Formation fossils are also found in pockets in this spoils area, so the possibility that this came from the Navesink and got mixed up with the Mount Laurel material from constant human activity cannot be ruled out.
  7. PrehistoricWonders

    Unknown tooth from NJ

    Hi, I found this tooth in the Navesink Formation, and, I was wondering what it is, it is exactly one inch long.
  8. A paper from the Mosasaur journal described three bones from the foot of a large Tyranosauroid Dinosaur from the late Cretaceous Maastrichtian deposits of the Navesink Formation of Big Brook New Jersey, on the East Coast of North America. News report http://sciencythoughts.blogspot.com/2019/04/evidence-of-large-tyranosauroid.html Paper from the Mosasaur a journal of the Delaware Valley Paleontological Society 0_Tyrannosaurids.pdf
  9. From the album: Cretaceous

    Belemnitella americana (belemnite guard with phragmocone still attached) Upper Cretaceous Navesink Formation Monmouth Group Big Brook Colts Neck, N.J.
  10. From the album: Cretaceous

    Belemnitella americana (belemnite guards) Choristothyris plicta (brachiopods) Upper Cretaceous Navesink Formation Monmouth Group Upper tributary of Big Brook Colts Neck, N.J. All were collected on 6/18/18
  11. From the album: Cretaceous

    Anchura sp.? (gastropod internal mold) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  12. From the album: Cretaceous

    Protocallianassa mortoni (ghost shrimp claw segments) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  13. From the album: Cretaceous

    Lenearia sp. (bivalve shell- internal mold) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  14. From the album: Cretaceous

    Arca rostellata (bivalve shell) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  15. From the album: Cretaceous

    Gyrodes sp. (gastropod internal mold) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  16. From the album: Cretaceous

    Shark Coprolite Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  17. From the album: Cretaceous

    Granocardium sp. (bivalve shell) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  18. From the album: Cretaceous

    Cucullaea antrosa (bivalve shell) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  19. From the album: Cretaceous

    Arca obesa (bivalve shell) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, New Jersey
  20. From the album: Cretaceous

    Liopistha protexta (bivalve shell) Upper Cretaceous Basal Navesink Formation Monmouth Group Bayonet Farm Holmdel, NJ.
  21. From the album: Cretaceous

    Cliona cretacica (traces of boring sponge on Pycnodonte convexa (oyster shell) Upper Cretaceous Navesink Formation Poricy Brook Middletown, NJ.
  22. Jeffrey P

    Pycnodonte Oysters from New Jersey

    From the album: Cretaceous

    Pycnodonte convexa (oysters) Upper Cretaceous Navesink Formation Poricy Brook Middletown, NJ.
  23. Jeffrey P

    Big Exogyra from New Jersey

    From the album: Cretaceous

    Exogyra costata (large oyster) Upper Cretaceous Navesink Formation Poricy Brook Middletown, NJ.
  24. From the album: Cretaceous

    Exogyra costata (specimen with both valves showing the right valve) Upper Cretaceous Navesink Formation Big Brook tributary Colts Neck, NJ.
  25. Jeffrey P

    Exogyra from New Jersey

    From the album: Cretaceous

    Exogyra costata (oyster) Upper Cretaceous Navesink Formation Poricy Brook Middletown, NJ.
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