I saw this piece.Tree was rotting at the ground and at the top of the tree. Somewhere in between it got more solid. Exactly what piece are you looking for?
This trunk sitting in a creek bed so the roots are in dirt and gravel.
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Thinking about cutting the other edges from this piece for casters.
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After seeing the stump shot on a different angle, not lignotuber but stump burling. Looking for a piece like the one I copied above.