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These are the musings and sketchings of an old geologist informally proposing new theory of how the Atlantic Ocean gets wider. Laymen: this is pitched to you. Geoscientists: your initial knee-jerk reaction might be "blithering blasphemy." Later these ideas may grow on you. One hundred fifty+ million years ago the Atlantic was a lineup of fresh water lakes, and now it is an ocean 3000 miles wide. Down the middle of the Atlantic a submarine mountain chain overlies miles-thick volcanic rock. Continuing eruptions of volcanic rock below those mountains add an inch a year to the edges of two of the...