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Project Mohole

Project Mohole was an attempt in the early 1960s to drill through the Earth's crust to obtain samples of the Mohorovičić discontinuity, or Moho, the boundary between the Earth's crust and mantle. The project was intended to provide an earth... Wikipedia
Start date: March 1961
Participants: Willard Bascom, Walter Munk, Roger Revelle, John Steinbeck, William Riedel