Some time ago a tree trunk washed up on the shore in front of the house. Today I got round to sawing it up. Whilst part of it had conventional tree rings, for a large part of its length the cross-section looks like this:



I am wondering what caused this effect and can only think that what we are seeing is different domains of fungal mycelium that had started to rot the tree before it entered salt water.  Anyone got a better idea?

4 Responses to “Logs”

  1. Sue Says:

    I looked through many images on-line & could not find nothing else it could be….seems plausible

  2. Stephen Says:

    Thanks. Let us see what anyone else has to say.

  3. Terry Swainbank Says:


  4. Stephen Says:

    Dave Genney says It’s called spalted wood and caused by a range of white-rot fungi. See http://en.m.wikipedia.org/wiki/Spalting.

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