Those pics got me thinking. What happens to the large boulders of schist and other rocks excavated during the foundation construction of any large building? Do they get sold to landscape companies in Jersey or Pennsylvania or something? If I had a nice SFH I'd be putting big chunks of schist all over the place and tell people it came from the basement of this tower or that tower.
Seriously though does anyone know? Hopefully surely they just don't dump it in some landfill.