This is a pretty good description of the many oaks we've lost over the past 20 years. I've noticed that, upon cutting and splitting them, they're all infested with borer beetles. Don't know if this is cause or effect, but someone suggested protecting the trunk with permethrin in the Spring/early Summer, so we've tried that for the past 4 or 5 years, and so far have had less oak death. But, I just don't know if it really helps or just a coincidence. They don't look a heck of a lot better. Also, permethrin is not cheap. Also, it seems to attack the red oaks much worse than the white.
Hope that helps someone. Guess this belongs in the garden thread.