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- The machines bored through soil that once lined the bottoms of ancient oceans.
- Ancient oceans left behind chalk subsoil deposits when they receded 70 million years ago.
- He developed the use of boron isotopes for determining the pH of ancient oceans.
- Other scientists have suggested that features seen nearby are indicative of an ancient ocean floor.
- They discovered the oscillations by analyzing climatic signals in ancient ocean sediments in the North Atlantic.