aek Posted January 18, 2021 Share Posted January 18, 2021 I found these on a beach in Illinois in a small lens of pyritic sand. I believe they are worm tubes but not entirely sure. They are only visible under microscope and occur with pyrite framboids. So my question is, are they indeed worm tubes, pellets, or something else? I can only assume they occur at the beach because of erosion of Silurian rocks placed there, but not sure of that either. In this pic below, you can see partially inside the tube which features spheres of pyrite. It's my understanding can be produced by worms. framboid Thanks for any help! Link to comment Share on other sites More sharing options...
oilshale Posted January 18, 2021 Share Posted January 18, 2021 (edited) Interesting find! I would guess Tentaculites Tentaculites - Wikipedia Tentaculites from the Manlius Formation - Members Gallery - The Fossil Forum Edited January 18, 2021 by oilshale 5 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
aek Posted January 18, 2021 Author Share Posted January 18, 2021 Thanks for you help- looks like a good match! Link to comment Share on other sites More sharing options...
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