A friend gave me several pieces of wood for turning, and I wanted to see if anyone can help to identify the tree. It is a Pennsylvania tree. The heart wood is light brown. There is a bright yellow layer between the bark and the sapwood, and the yellow color bleeds over a little into the whitish sapwood. The bark is a thick, rough, gnarly gray. I made some rough bowls, and the wood turned nicely. Just trying to find out what it is I am turning. Thanks.