My uncle got a few trees taken down. He knows I burn wood and asked if I wanted the wood. I say yes and have been taking it all. I had a friend help last and weekend and he said that this was Black Walnut and very valuable. My great Uncle is in his 90's and lived in the house since the 60's. So the tree is at least that old. This thing was a monster and they just dropped it on the ground in 10ft sections. Is there any value in this? Picture attached of a small split.