There are some minerals that crystalize out of solution. Those are the nodules that the Glomar Explorer said publicly that they were going to scrape off the bot

There are some minerals that crystalize out of solution. Those are the nodules that the Glomar Explorer said publicly that they were going to scrape off the bottom of the ocean. The Glomar Explorer was really built (by Howard Hughes, on behalf of the CIA) to pick up a sunken Soviet submarine.