J. L. Fastook and J. W. Head. Amazonian mid- to high-latitude glaciation on Mars: Supply-limited ice sources, ice accumulation patterns, and concentric crater fill glacial flow and ice sequestration. Planetary and Space Science, 91:60–76, doi: 10.1016/j.pss.2013.12.002, 2014. Abstract: Concentric crater fill (CCF) occurs in the interior of impact craters in mid- to high latitudes on Mars and read more Amazonian mid- to high-latitude glaciation on Mars: Supply-limited ice sources, ice accumulation patterns, and concentric crater fill glacial flow and ice sequestration