Up here in the North we call that Ironwood. You might know it as Hop Hornbeam. It burns very hot and is called Ironwood for a reason. Keep an extra, sharp chain ready as you might find they dull quickly.
That is without a doubt, hop hornbeam. The growth pattern also gives it away if the bark wasn't so obvious. That's a big one too. Most of the ones in my woods don't get much over 4-6" diameter before they die. One of the best firewood species in the northeast USA.
Iron Wood for sure very hot and lasts a long time
We have them that big and bigger here . I only take
them after they die. Make sure you have a very sharp chain
and a strong back. The one in the picture is an old tree very
slow growing. Takes about as long to dry as Sugar Maple
It's great firewood, but given any other options, I'd leave it standing especially since it looks healthy and is the largest tree in the shot. If you cut it down, take branches much smaller than you normally would.