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Features of Acidalia Planitia (extra-detail mgnf)
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This HiRISE extra-detail mgnf (358 x 266 mt or 392 x 291 yards) shows incipient scalloped terrain in the Southern Slopes of the Crater.
Scalloped terrain — depressions with scalloped edges and polygonal fractures — has been interpreted as a sign of surface caving, perhaps due to sublimation (evaporation) of underlying ice.
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