FIGURE 2. Dendritic 'spiders' that form beneath spots in the south polar cryptic region.

From the following article:

CO2 jets formed by sublimation beneath translucent slab ice in Mars' seasonal south polar ice cap

Hugh H. Kieffer, Philip R. Christensen and Timothy N. Titus

Nature 442, 793-796(17 August 2006)

doi:10.1038/nature04945

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This image was acquired in Mars' southern hemisphere summer (Ls 270°) after the CO2 ice had completely sublimated. The MOC image (R09-04023) is approx3 km times 4 km in size, centred near -86.3°S, 99.5° E at 4.3 m per pixel.

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