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The objective of this observation is to examine at least two layers that are exposed in the wall of an impact crater that’s less than 5 km across.

Even without a 3D picture, we can easily see that the crater’s walls are fairly steep. Phlegra Montes are a series of mountain ranges, massifs and knobby terrain in the northern lowlands of Mars. 

Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_065243_2065
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