HiRISE images reveal (1) abundant boulders in surface units previously interpreted as fine-grained deposits
from water or the air; (2) further evidence for water-carved gullies, although the most recent bright gully deposits
could have been dry flows; and (3) evidence that recent large craters were the result of impact into volatile-rich ground.
These results should help focus future exploration of Mars.
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PSP_003583_1425
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TRA_000846_2475
PSP_001964_2275
PSP_001810_2175
PSP_002172_1410
PSP_002932_1445
PSP_001714_1415
PSP_001846_1415
PSP_001481_1875
PSP_001978_1445
PSP_003596_1435
PSP_004229_1435
PSP_001846_2390
PSP_001508_2400
PSP_002200_1380
PSP_002812_1330
PSP_003252_1425
PSP_003942_2120
PSP_001538_2035
PSP_002158_2035
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With detailed images from the HiRISE camera, a dome of layered ice deposits on the north pole of Mars comes into sharper
focus, showing evidence of recent mass wasting, flow and debris accumulation.
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PSP_001636_2760
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TRA_000845_2645
TRA_000863_2640
PSP_001412_2650
PSP_001488_2665
PSP_001550_2640
PSP_001738_2670
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Athabasca Valles is a young 'outflow' channel system in the equatorial region of Mars. Most researchers agree
that it was carved by catastrophic floods of water, and some believe that frozen floodwaters survive to this day
on the channel floor. However, new HiRISE observations reveal that Athabasca Valles is entirely coated by a
thin veneer of solidified lava. The lava poured from a fissure, filled the channels, and then drained
downstream leaving behind a thin layer of hard rock to coat and preserve the channel system.
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PSP_003294_1985
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PSP_001408_1900
Stereo pair PSP_001606_1900 and PSP_002226_1900
Stereo pair PSP_001540_1890 and PSP_002371_1890
Stereo pair PSP_002938_1890 and PSP_003083_1890
Stereo pair PSP_002661_1895 and PSP_003294_1895
Stereo pair PSP_002174_1875 and PSP_002292_1875
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