Geologists identify deep-earth structures that may signal hidden metal lodes

Scientists have discovered previously unrecognized structural lines
100 miles or more down in the earth that appear to signal the
locations of giant deposits of copper, lead, zinc and other vital
metals lying close enough to the surface to be mined, but too far
down to be found using current exploration methods.
Source: *FS – All – Science News 2 Net
Geologists identify deep-earth structures that may signal
hidden metal lodes