Word: oberbeck
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Dates: during 1992-1992
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...Union's meeting in San Francisco, some respected researchers suggested that a large space rock 10 to 20 km (6 to 12 miles) in diameter slammed into the earth 250 million years ago and set whole continents adrift. The announcement by Michael Rampino of New York University and Verne Oberbeck of NASA-Ames Research Center stunned fellow scientists, though many dismissed it out of hand. Some skepticism seemed warranted. Rampino and Oberbeck rely heavily on their supposition that certain rocks -- known as tillites and long thought to be formed on the earth by glaciers -- were actually the result...