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| Description: Martian Gullies (c) Polygonal cracks are visible in this Opportunity image of Escher Rock. They were believed to have formed when this area was flooded. Water seeped into the rock, which cracked as the water froze and expanded, then evaporated away Picture Stats: Views: 430 Filesize: 487.62kB Height: 900 Width: 703 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=16320 |