Holden (Martian crater)
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Holden is a 140 km wide crater situated within the Margaritifer Sinus quadrangle region of the planet Mars, located with the southern highlands. It is named after American astronomer Edward Singleton
Close-up of channels on rim of Holden crater, as seen by THEMIS.
Wide view of a delta in Holden crater, as seen by CTX.
Close up view of part of delta from the previous image, as seen by HiRISE under HiWish program
Close view of the previous image showing layers, as seen by HiRISE under HiWish program and enlarged with HiView
Nili Fossae
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Nili Fossae is a group of large, concentric grabens on Mars, in the Syrtis Major quadrangle. They have been eroded and partly filled in by sediments and clay-rich ejecta from a nearby giant impact cra
Holden (Martian crater)
…in Gale crater, Holden was one of the seven finalists for the MSL landing site, which also included Eberswalde crater, Mawrth Vallis, Miyamoto crater, Nili Fossae trough, and southern Meridiani Planum…
Nili Fossae as seen by CRISM. Top left: location of observation. Bottom left: context of observation. Top right: yellow-brown areas denote olivine, bright green areas denote phyllosilicates and purple areas pyroxene. Bottom right: approximate true-color view of the target area.
Viking Orbiter 1 mosaic of Nili Fossae
Estimating carbon in the Nili Fossae plains region of Mars from orbiters.
Nili Fossae – largest known carbonate deposit on Mars.