I can't believe you researched the whole internet, but maybe if tell us a bit more about what you are looking for.
Where they are? That is very well posted and documented on marine charts to prevent bottom fisherman from dragging them up.
Are you looking for the make up of them?
Are you looking for connectivity points?
what are you after?
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com