I scrounged a full truck load of pic 1 and 2 the other day. The wood has very smooth bark and a dark brown heart. My guess was walnut or ash but would think the bark should be rougher. Pic 3 and 4 my 5 year old and I scrounged 3 full truck loads yesterday already bucked but some need to be whacked to fit in stove. I think it is norway maple but like to hear what you all think. I scrounged this same kind a couple of years ago and was told it was norway maple and it burned incredible. Super heavy and I couldn't keep the stove under 550 with it. I have been looking for dead fall for the next shoulder seasons and I have been finding green wood. Go figure!