It's not Oak.
But it burns better than a snowball.
It's actually quite usefull to have in the "Inventory" for the start and end of burning season when you don't need anything but a slight warm up of the house, and for mixing in with the good stuff mid winter when you need a bit less than full heat out of the stove.
It saves the Oak, Locust, and Maple for when it's needed, and split small, gets a stove HOT quick in the mornings.
Dadgum rounds are back breakers though, and a Cord of Cottonwood goes quick so don't count it as more than what it is...BIG kindling.
Stay safe!
Dingeryote