I picked up some wood the other day, from my usual, friendly neighborhood guy who has lots of Elm (grr), but he had some other wood there that I'm hoping with some help identifying. Wood is extremely heavy. Bark looks similar to Ash, but much darker. Inside, the wood has very distinct sap wood - heart wood variations in color similar to Oak, but the heart wood is almost mustard yellow...even slightly greenish in tint. In some places the wood had very dark almost black heart wood, but I'm not sure that wasn't due the the presence of a fair amount of steel nails that were pounded into it. The chain saw cut the stuff like butter (Yes I was careful to avoid the nails) almost like it was Sumac, but it was NOT Sumac. Much too heavy and straight grained more like Ash. It also splits very easy. Any clues?