A helicopter with a magnetometer hanging below it--used for identifying possible sulfide mineral deposits--flies a grid pattern over a lake in northeastern Minnesota during the summer of 2010.
We saw this helicopter flying over Birch Lake near Babbitt, Minnesota, summer 2010. We've also watched three years of drilling over 3,000 feet under the lake.
We saw this helicopter flying over Birch Lake near Babbitt, Minnesota, summer 2010. We've also watched three years of drilling over 3,000 feet under the lake.
Hannah110101 1 year ago