Nilosyrtis Mensae
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Nilosyrtis Mensae is an area of Mars in the Casius quadrangle. It is centered on the coordinates of 36.87° N and 67.9° E. Its western and eastern longitudes are 51.1° E and 74.4° E. North and south la
Astapus Colles Mounds and Knobs, as seen by HiRISE. Scale bar is 500 meters long.
Inverted crater mesa, Nilosyrtis Mensae. This is thought to be an old impact crater that was eroded, filled in and then eroded again, so that now it is a low mesa surrounded by a bouldery slope. Image is about 900 m wide.
Bedrock in Nilosyrtis Mensae. Image is about 1.5 km wide. In this enhanced-color image, the blue and green colors are generally due to mafic (magnesium and iron rich) minerals that are not altered by water, while the warmer colors are due to altered minerals like clays. The structure in this scene is complex, from impact and perhaps fluvial and volcanic processes, tectonic faulting, and erosion. This is an old terrain with a complex geologic history.
Ismenius Lacus quadrangle
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The Ismenius Lacus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey Astrogeology Research Program. The quadrangle is located in the northwestern
Image of the Ismenius Lacus Quadrangle (MC-5). The northern area contains relatively smooth plains; the central area, mesas and buttes; and the southern area, numerous craters.
Cadmus slaying the dragon of the Ismenian Spring
Fresh crater, as seen by HiRISE under HiWish program.