Nice wood but don't think it'll do well in the fireplace
We have a whole forest up here on the bottom of Lake Superior. It may be found in different locations in this great lake. Someone told me one was also located in Lake Michigan. A few years ago a UP diver (diving teacher) located some in shallower depths but he keeps it pretty much to himself. The trees all stand upright but are like approx. 100 feet down. I've often wondered why someone doesn't do a major TV documentary on it. It's like scientists don't want this fact to get out.
http://shipwrecktours.com/shipwrecks/other-sights/the-7900-year-old-forest/
Badger