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String of Impact Craters

String of Impact Craters

JVPD/0003/ImageEnvision.com

Stock Photo Description: NASA image of a string of impact craters, Sahara Desert of northern Chad. The concentric ring structure left of center is the Aorounga impact crater with a diameter of about 17 kilometers (10.5 miles). A proposed second crater, similar in size to the main structure, appears as a circular trough surrounding a central peak in the center of the image. A third structure, also about the same size, is seen as a dark, partial circular trough with a possible central structure in the right center of the image. The proposed crater "chain" could have formed when a 1 km to 2 km (0.5 mile to 1 mile) diameter object broke apart before impact. The dark streaks are deposits of windblown sand that migrate along valleys cut by thousands of years of wind erosion. Radar imaging is a valuable tool for the study of desert regions because the radar waves can penetrate thin layers of dry sand to reveal details of geologic structure that are invisible to other sensors.

Photo Credit: NASA/JPL

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Keywords: royalty-free, stock photography, stock photos, pictures, images, graphics, posters, fine art prints, aorounga, aorounga impact crater, chad, crater, craters, geography, impact crater, impact craters, jpl, nasa, sahara desert

Image: 0003-0701-1019-1822
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License type: Commercial Royalty-free

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