Start Date: End Date: Published Date Data Date
Akimiski Island, Canada
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Published April 15, 2008
Scraped clean and weighted down for thousands of years by Pleistocene ice sheets, Akimiski Island in James Bay provides a case study of how Earth's land surfaces evolve following glaciation. During the last ice age, this small island was buried under several thousand meters ice, but since its retreat, the island has rebounded (risen in elevation) and new beach areas have emerged, streams and lakes have formed, and trees and other vegetation have colonized the new territory.
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Island in the Sky, Canyonlands National Park
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Published January 3, 2008
This park in Utah encompasses some of the most remote and rugged terrain in the continental United States.
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Hobet-21 Mine, West Virginia
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Published December 23, 2007
This pair of images shows the growth of a mountaintop removal in the headwaters of Mud River in Boone County, West Virginia, between 1987 and 2002.
Mississippi River Delta
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Published October 7, 2007
Time, weather, and human intervention have all shaped the Mississippi Delta in Louisiana, a giant bird’s foot shape protruding into the Gulf of Mexico. The Mississippi River deposits sediment into the ocean, and over 25 years, NASA Landsat satellites observed changes in the delta’s shape.
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Capitol Reef National Park, Utah
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Published October 3, 2007
Sixty million years of erosion have exposed folded layers of rock.
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Three Gorges Dam, China
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Published June 13, 2007
The longest river in Asia, the Yangtze River brings mixed blessings to China. Although it meets the water needs of millions of people, the river regularly overflows its banks. To protect residents and land in the lower Yangtze floodplains, China began construction on the Three Gorges Dam in 1994.
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