Tag Archives: meanders

HiRISE: Martian meanders and scroll-bars

This is a portion of an inverted fluvial channel in the region of Aeolis / Zephyria Plana, at the Martian equator. Channels become inverted when the sediments filling them become more resistant to erosion than the surrounding material. Here, the … Continue reading

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HiRISE: Meandering channel on Hellas’ rim

The central portion of this image features a mildly-winding depression that was carved by water, likely around four billion years ago shortly after the Hellas basin formed following a giant asteroid or comet impact. Water would have flowed from the … Continue reading

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HiRISE image: sinuous ridges and meanders

These ridges are thought to be old river channels, but wind erosion has created inverted topography. What was low (the channel bottoms) was more resistant to erosion, so now it is relatively high. In a closeup image, we see a … Continue reading

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