The White Oak here is not similar at all.
When I first looked at the above pics my mind said postively Ash. I am inclined to agree with you on Ash as it looks similar to Ash out here.
I made by above reference from the similarity to the bark pic'd in the Missouri site (White Oak) that I referenced earlier on this thread.
But ever learning, and not having the advantage of actually seeing.... I researched some of the dendrology sites (for that part of the country) which referenced that Ash and White Oak are often mistaken based upon bark similarities. The appearance of ray cells in the above pic lead me to the conclusion (after I enlarged pic) based upon cell characteristics.
It is also possible that the sites I visited and have referenced may have wrong pics of these species.