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  • Profile picture of Chad Bruce

    Chad Bruce posted a new specimen in the group Group logo of What is it?What is it? from the myFOSSIL app 3 years, 10 months ago

    3 years, 10 months ago
    3 years, 10 months ago

    Chad Bruce has contributed a new specimen to myFOSSIL!

    • Profile picture of Paul McLain
      Paul McLain replied 3 years, 10 months ago

      This could be an internal cast of a Brachiopod. Shell fills with sediment and dissolves away leaving behind a replica of the inside of the critter rather than the outside. These internal casts are called steinkerns.