A remarkable sand crab shaped mesa system in the Nilosyrtis region. I assume it was created from heavily dessicated crater basin (the mesa tops were once the bottom). Note the two great outflow channels in the upper left.
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Morphological Mars Mystery This image covers many shallow irregular pits with raised rims, concentrated along ridges and other topographic features. How did these odd features form? Image: NASA/JPL/University of Arizona
Reull Vallis, the river-like structure, is believed to have formed when running water flowed in the distant martian past, cutting a steep-sided channel through the Promethei Terra Highlands before running on towards the floor of the vast Hellas basin.
I do love new but nothing is as special as real vintage my vintage enamelled watering can ...Vintage Jars ..Vintage Pudding Basins and Toast Rack i've just bought myself a second toast rack to hang next to this one His & His i'm not supposed to eat bread have a lovely day everyone xx