In Photos: The Impact Craters of North America

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Pingualuit crater

Credit: courtesy of Denis Sarrazin, NASA Earth Observatory
Pingualuit crater, captured in this aerial image taken Oct. 12, 2007, spans some 2 miles (3 km) across with its lake water having a depth of 807 feet (246…Read More »

m), according to NASA's Earth Observatory. Like many other craters, this one, in northern Quebec, formed millions of years ago as a result of meteorites striking Earth's surface.

"The crater lakes hold such huge volumes of water in comparison to the surrounding glacial lakes that they're slower to respond to temperature changes," explained Reinhard Pienitz, a freshwater lake expert, in an Earth Observatory post. "Pingualuit Crater Lake is always the last to freeze in the winter and the last to melt in the spring."    Less «
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Jeanna Bryner, LiveScience Managing Editor

Jeanna Bryner

Before becoming managing editor, Jeanna served as a reporter for Live Science and for about three years. Previously she was an assistant editor at Scholastic's Science World magazine. Jeanna has an English degree from Salisbury University, a Master's degree in biogeochemistry and environmental sciences from the University of Maryland, and a science journalism degree from New York University.
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