Yet More Evidence - YetMoreEvidence,andtheInference...

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Yet More Evidence, and the Inference With the passage of time, more evidence accrued in favour of Wegener's bold hypothesis. For example:   it was found that the deep sea-floor was mostly bare rock. To see why this is surprising, visualize the Amazon river  as it flows into the Atlantic. You may have seen pictures of this trubid brown flow, filled with silt from the runoff of  the rich rainforests in the Brazilian interior. Over many hundreds of millions of years, this kind of process should  have left the ocean bottoms deeply covered in accumulated deposits -- but that was not seen. Where did the  accumulated material go, and what provided the fresh smooth rock surfaces?   the development of geochronology (the use of radioactive age-dating techniques) allowed geologists to determine  the ages of rocks brought up from the sea floor. They discovered that there was an age gradient of a very telling  sort. Consider again specifically the North Atlantic. It was discovered that the rocks nearest Europe and North 
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  • Spring '10
  • EmilyHoward
  • Astronomy, Mid­Atlantic Ridge, trubid brown flow, radioactive age­dating techniques, similarly active undersea, fresh smooth rock, enormous volcanically­active mountain

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