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  • Lighting Lou posted an image in the group Group logo of What is it?What is it? from the myFOSSIL app 2 months ago

    2 months ago
    2 months ago

    Massive rock (~225kg) found underground with peculiar markings (not machine made) – my ask is whether the size and unusual shape may be something else my novice eyes don’t see?
    – Thanks

    • That’s probably just erosion.

    • It could be erosion, but it could also likely be what’s called a phycode. Most phycodes are casts (or coming above the rock it’s in), but some are molds (meaning it dips into the rock like yours). Basically, phycodes are tunnels dug by animals like worms or animals that have an anchoring “foot”, that hole is filled and it leaves a defined impression.

    • Thank you very much for the feedback 👍

    • looks like erosion to me