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Please send here any wallpapers that have 200 or more uploads. We had a group like this one but it was deleted. I hope you will join me with your wallpapers. Everyone is welcome. No advertising (spam) of nay kind. I ban spammers.
HRSC mosaic of the Martian shield volcano Ceraunius Tholus. This volcano measures about 130 km from end to end and stands about 5.5 km above the surrounding Tharsis highlands. The nature of the large canyons that run from the central caldera into the crater at top left are unknown. One possibility is that it represents a large fissure in the mountain that channeled lava downslope. Another possibility is that heating caused the catastropic melting of an ice cap on the mountain during warmer, wetter times.
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