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This series of photographs presents an example of wave erosion to middle and high school students. The five images, dated from 1890 to 1990, depict the demise of an actual sea stack near Newport, Oregon. The introduction explains how sea stacks begin as part of an outcropping of land such as a cliff and how they are gradually eroded by the waves. A pop-up window shows the location the original sea stack on a map of the United States. Movie controls allow students to repeat or pause the succession of images, which can give students more time to analyze and compare the images. Copyright 2005 Eisenhower National Clearinghouse
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