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aek

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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. 

 

6005ebb0688cf_ScreenShot2020-11-02at5_27_05PM.jpg.5650dfc97c9772e9cc5a68a6f89b2deb.jpg

 

6005ec3418fbd_ScreenShot2020-10-31at7_27_51AM.jpg.45ef1b55b3fa9bc7533e74ed2b7465c4.jpg

6005ec63dc45a_ScreenShot2020-10-31at7_28_36AM.jpg.83c04e3e259e4424f2fb499911282ee2.jpg

 

 

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.

6005ec785402f_ScreenShot2020-10-31at7_25_57AM.jpg.b48bc4410a2744eadd032c5b4ed91431.jpg

 

framboid

6005ed614d694_ScreenShot2020-11-02at5_31_18PM.jpg.524005b21c52badbc7cdc210f3789f70.jpg

 

Thanks for any help!

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