Polar Stratigraphy

Jet Propulsion Laboratory https://www.jpl.nasa.gov/ June 1, 2000

NASA's Mars Global Surveyor shows three different orbits over the north polar cap in April 1999. Each shows a different part of the same ice-free trough.

These three images were taken on three different orbits over the north polar cap in April 1999. Each shows a different part of the same ice-free trough. The left and right images are separated by a distance of more than 100 kilometers (62 miles). Note the similar layers in each image.

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