What do you call this log damage?

[Old Greenhorn]

Well Doc, you can call it a Dobro because it is a (tradename) Dobro. Personally I don't care if you call it anything you want. As far as your musicality goes, bring enough beer for the listeners and I bet before long you sound like Jerry D. himself, and if you ask Jerry what he plays I am pretty sure he will say 'dobro' regardless of the brand or builder. No wait, check that, knowing Jerry as I do he would probably say something funny like "adequately", or "well enough to get by".  ;D

[Southside]

Build a Dobro out of "Denim Pine" and watch the lawyers go nuts!!  :D

[Old Greenhorn]

Build a Dobro out of "Denim Pine" and watch the lawyers go nuts!!  :D

If you think the lawyers will go nuts, wait until you see the guy trying to keep it in tune. :D :D

[chainsaw]

I've seen this fairly often with red oaks. Blackened checks, shakes, and pockets of rot are numerous. You can tell before you cut it from the black crack or scar at the at the base of the tree. It sometimes oozes with a sickeningly sweet odor. The damage usually tapers off a few feet up in the log. Do you know the correct name and cause of this damage?

we call it spangle or shake