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  • Matthew Hickman posted an image in the group Group logo of What is it?What is it? from the myFOSSIL app 9 months, 3 weeks ago

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

    what is this #fossil

    • I think that’s limestone. It’s made of calcium carbonate which dissolves in the presence of even weak acids like vinegar. Limestone rock formations can be crazy looking for this reason. I’m not an expert tho just a guess