Start Date: End Date: Published Date Data Date
Western Namibia
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Published May 18, 2008
Throughout southern Africa, the a long line of broken cliffs and rock outcrops, called the Great Escarpment, separates coastal deserts from high-elevation inlands, with land levels rising swiftly.
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Chaiten Volcano
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Published May 11, 2008
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Porto Primavera Reservoir, Brazil
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Published April 27, 2008
Brazil’s Porto Primavera Dam sits on the Paraná River, 28 kilometers (17 miles) upstream from the confluence of the Paranapanema and Paraná Rivers. Constructed to provide hydroelectricity, this dam created the Porto Primavera Reservoir
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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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Lake Janisjarvi Impact Crater
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Published April 6, 2008
Lake Jänisjärvi is a roughly oval-shaped lake, some 13 by 17 kilometers (8 by 11 miles) across, in northwestern Russia, near the Finnish border. The basin for this lake was formed hundreds of millions of years ago by a meteorite impact.
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Nicholson Crater, Canada
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Published March 23, 2008
Some 400 million years ago, a meteor struck Earth in what is now Canada’s Northwest Territories. The 12.5-kilometer- (7.8-mile-) wide crater is now Nicholson Lake, one of many small lakes that dot the sub-arctic, glacier-scoured landscape.
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Pingualuit Crater, Canada
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Published February 10, 2008
Pingualuit Crater holds a lake about 267 meters (876 feet) deep. Because this lake has no connection to any other water body, inflows from other lakes cannot contaminate Pingualuit’s sediments.
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Pine Island Glacier, Antarctica
Published January 11, 2008
The Pine Island Glacier has been the focus of scientific attention for many years. Large numbers of deep crevasses are a sign that parts of the glacier are moving rapidly.
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