• Sean Moran posted a new activity comment 9 months, 2 weeks ago

    9 months, 2 weeks ago
    9 months, 2 weeks ago

    Looks like you have a bovid tooth, @jacob-polzin! It can be pretty difficult to distinguish bison from cow, but primarily we look to see if there is a column (style on upper teeth, stylid on lowers) present and if so how strong it is. It looks like there’s a pretty strong style on this tooth, so I’d lean towards this being a fossil bison tooth, as…[Read more]

  • MacKenzie Smith posted a new activity comment 9 months, 2 weeks ago

    9 months, 2 weeks ago
    9 months, 2 weeks ago

    @jacob-polzin Sorry for the late response. I sent these pictures to my girlfriend since I didn’t recognize it and she studies Mesozoic plants and focuses mainly on the Triassic and Jurassic. We can certainly see why you thought plant though. Because therapod tracks have been found in the Manassas, do you think it could be a fluvial structure? My…[Read more]

  • Mackenzie Ross posted a new activity comment 9 months, 2 weeks ago

    9 months, 2 weeks ago
    9 months, 2 weeks ago

    Very cool find! @jacob-polzin this looks like it could possibly be a plant trace fossil! Maybe @mackenzie-smith can be of help!

  • Victor Perez posted a new activity comment 9 months, 3 weeks ago

    9 months, 3 weeks ago
    9 months, 3 weeks ago

    Hey @jacob-polzin, this does indeed look like a cetacean tooth. It’s difficult to say what kind, given that it’s a partial tooth. The size makes me want to guess something like Eurhinodelphis, but I’m not certain. I know Stephen Godfrey from the Calvert Marine Museum is working on a book describing the cetaceans from the Calvert Cliffs, but I’m…[Read more]

  • Matthew Gramling posted a new activity comment 9 months, 3 weeks ago

    9 months, 3 weeks ago
    9 months, 3 weeks ago

    Hey@jacob-polzin !!! @samantha-ocon should be able to connect you with someone who can help provide an ID!

  • Victor Perez posted a new activity comment 9 months, 4 weeks ago

    9 months, 4 weeks ago
    9 months, 4 weeks ago

    Hi @jacob-polzin, I think this one is a croc tooth! The taxonomy of Thecachampsa is heavily debated, but for now we can say it came from the order Crocodilia and the family Gavialidae.

  • Victor Perez posted a new activity comment 10 months, 1 week ago

    10 months, 1 week ago
    10 months, 1 week ago

    Hi @jacob-polzin, I meant to mention in my first comment that this tooth looks like Galeocerdo aduncus to me rather than Physogaleus. Could you update that as well?

  • Victor Perez posted a new activity comment 10 months, 2 weeks ago

    10 months, 2 weeks ago
    10 months, 2 weeks ago

    Hi @jacob-polzin, this is actually a dolphin tooth, likely from the genus Hadrodelphis. We can also say that your fossils from Westmoreland came from the Miocene epoch.

  • Victor Perez posted a new activity comment 10 months, 2 weeks ago

    10 months, 2 weeks ago
    10 months, 2 weeks ago

    Hey @jacob-polzin, on your posts from Westmoreland you’ve been putting Calvert & Eastover, instead you should put Calvert or Eastover. Since the fossils were found on the beach the tooth could have come from either formation, but we know it didn’t come from both formations. I’ve been editing it when I notice it, but just wanted to point it out for…[Read more]

  • Victor Perez posted a new activity comment 10 months, 2 weeks ago

    10 months, 2 weeks ago
    10 months, 2 weeks ago

    Hi @jacob-polzin ! On one of your photos, I can see some horizontal banding, which tells me this is a small sliver of a sperm whale tooth (family Physeteridae). Also, we can say this came from the Miocene epoch. Once you update those, I’ll mark this as research grade!

  • Victor Perez posted a new activity comment 10 months, 2 weeks ago

    10 months, 2 weeks ago
    10 months, 2 weeks ago

    Hi @jacob-polzin , nice find. I believe this a drum fish jaw bone, genus Sciaenops. There are actually two formations exposed at Westmoreland, the Calvert Formation and the Eastover Formation. If you update the classification and the formation, I can mark this as research grade!

  • Mackenzie Ross posted a new activity comment 10 months, 3 weeks ago

    10 months, 3 weeks ago
    10 months, 3 weeks ago

    Hi @jacob-polzin, @vperez or @bill-heim can help confirm this ID! Also, you can update the lithostrat to the Chesapeake Group. The Miocene formations in the Chesapeake Group are the Calvert and Eastover Formations.