Nobody Knows NothingI however think this will unravel into at least a $10-$30 buyout or perhaps a whole lot more.
Think of it over just one square mile.
If the specific gravity is 1.7 g/cc. like Goldsource says, then every cubic meter weighs 1700 kg.
1600m X 1600m X 25m X 1700kg = 108,800,000,000 kg, or 108,800,000 Tonnes.