Looking to identify 2 different types of wood that my tree guy dropped off a few months ago and i'm just getting around to splitting. The first 2 pictures (if they load correctly) are of the same round and split. Smells like cow manure. The round felt heavy like oak but when i split it the split seemed awful light weight to me. The next two pictures are of the second type of wood. I noticed the purple looking streak on some of the spilts and after reading some posts i thought maybe poplar?? tulip??? Any input from the pros would be great.