The Gemstone Floor of Noctis Labyrinthus
September 5, 2011
The smooth light-toned deposits on the floor of Noctis Labyrinthus, a series of depressions at the westernmost end of Valles Marineris, may contain a form of hydrated silica, perhaps opal, which is a gemstone.
The opal could have formed by chemical weathering of basaltic lava flows or volcanic ash in the presence of water. Also visible in the left side of the enhanced-color subimage are sand dunes with two colors, perhaps due to dark sand covered in places by bright reddish dust, and an impact crater with dark ejecta.
Written by: Alfred McEwen
Image Credits: NASA/JPL/University of Arizona
The opal could have formed by chemical weathering of basaltic lava flows or volcanic ash in the presence of water. Also visible in the left side of the enhanced-color subimage are sand dunes with two colors, perhaps due to dark sand covered in places by bright reddish dust, and an impact crater with dark ejecta.
Written by: Alfred McEwen
Image Credits: NASA/JPL/University of Arizona
Topics:
Noctis Labyrinthus, Valles Marineris, Coprates quadrangle, Environment, Chrysoritis, Hydrated silica, Eos Chaos, Sand, Opal, Volcano, Hospitality Recreation
