HiRISE (NASA)
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HiRISE 3D: A Source of Dunes

This image shows the head of an Abalos Undae dune field revealing possible sand source near base of Planum Boreum. This is in the north polar region of Mars.

uahirise.org/anaglyph/ESP_0794
NASA/JPL-Caltech/UArizona

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