Monthly Archives: November 2013

Impact debris from Mars lies everywhere on Phobos

Posted on November 15, 2013 by rburnham

On Earth there are meteorites that arrived naturally from the Moon and also ones from Mars that arrived the same way. Both are fragments that were ejected into space at escape velocity in the aftermath of big meteorite impacts.

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Debris aprons and valley fill hold ancient ice several hundred million years old

Posted on November 14, 2013 by rburnham

Along the edge of the crustal dichotomy, where the southern highlands step down onto the northern plains, lies a landscape of mesas, buttes, and valleys. Valleys appear choked with linear streams of debris, and on the flanks of many mesas … Continue reading →

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Pressure-release melting put rocky floors into early Mars craters

Posted on November 7, 2013 by rburnham

Martian craters in the highlands that are wider than 10 kilometers (6 miles) often have flat, smooth, shallow floors. This fact has been noted since the first spacecraft images of Mars were taken by NASA’s Mariner 4 in 1965. Over … Continue reading →

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