This is some black walnut from a tree that died several years ago. It has been sitting in the weather, and was going
to be firewood, but now that a lathe lives in my shop, I've been giving it a second look...

I cut some chunks of it up the other day, and found these markings.....I know it's some sort of water/fungal/bacteria reaction, but what is the correct term to describe it? Spalting?

Thanks

Jim


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