Elysium Planitia (CTX Frame - False Colors)

A low, sinuous tectonic ridge ("wrinkle ridge") can be seen in the South-East (lower left) and a rough-textured flow (lava?) fills the North-West (upper right) part of the image. Terraces that may have been carved by floodwaters are visible on the Southeastern side of the contact between the wrinkle ridge and the flow.
On the Northwestern side of this contact, the flow itself has a banded appearance reminiscent of contour lines or bathtub rings. It may be that long ago, when the flow was mobile, its surface level dropped, leaving these bands as indicators of how high it once stood. Alternatively, the bands could be buried terraces draped by the rough-textured flow. Relatively straight and narrow dunes (about 10 mt wide) have marched across the surface of the flow, and a thin layer of light-toned dust blankets the region. A dark spot about 100 mt in diameter on the left side of the image is probably where a cluster of small impacts blew away the dust, revealing the darker shade of the underlying surface.