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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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New Activity on Kilauea
Published April 14, 2008
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Harrat Khaybar Volcanic Field
The western half of the Arabian Peninsula contains not only large expanses of sand and gravel, but extensive lava fields known as haraat. One such field is the 14,000-square-kilometer Harrat Khaybar, located approximately 137 kilometers to the northeast of the city of Al Madinah (Medina). The volcanic field was formed by eruptions along a 100-kilometer, north-south vent system over the past 5 million years. The most recent recorded eruption took place between 600–700 AD.
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Lonar Crater, India
Published April 13, 2008
India’s Lonar Crater began causing confusion soon after it was identified. Lonar Crater sits inside the Deccan Plateau—a massive plain of volcanic basalt rock leftover from eruptions some 65 million years ago. Its location in this basalt field suggested to some geologists that it was a volcanic crater. Today, however, Lonar Crater is understood to result from a meteorite impact that occurred between 35,000 and 50,000 years ago.
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Gulf of St. Lawrence
Published April 12, 2008
Located in eastern Canada, the Gulf of St. Lawrence owes many of its unique characteristics to its geography. Sea water flows into and out of the gulf through only two channels. Currents and tides sweep cold, Arctic seawater through the narrow Strait of Belle Isle in the north. In the south, the wider Cabot Strait admits warmer water from the Atlantic Gulf Stream. With no other outlet to the Atlantic, the Gulf of St. Lawrence is relatively isolated.
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Dust Plume over the Eastern Mediterranean
Published April 11, 2008
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Dust in the Central Mediterranean
Published April 10, 2008
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Canyons of the Andes Mountains, Southern Peru
In the arid terrain of the western slopes of the Andes Mountains in southern Peru, very little vegetation exists to soften or obscure the rugged topography. In the central part of the state of Ayacucho, pictured in this satellite image, the mountains are dramatically sliced by dozens of nearly straight, parallel canyons that point southwest toward the Pacific coast.
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Floods in the U.S. Midwest
Published April 9, 2008
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Vog from Kilauea Volcano, Hawaii
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Floods in Northeast Brazil
The swollen Piranhas and Apodi Rivers, barely visible in satellite images from mid-March 2008, flow dark blue over the bright green, plant-covered landscape of northeastern Brazil in early April 2008. The two rivers were among many that overflowed in this normally dry corner of Brazil in the wake of heavy rains in March and April.
Fires in Southern Russia
Published April 8, 2008
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