The dim regions have up some-more than 10 million block kilometres of a Martian northern lowlands, though their combination wasn’t clear. Past bright measurements indicated which they have been distinct dim regions found elsewhere upon a Red Planet, which include especially of basalt.
Briony Horgan and Jim Bell of Arizona State University in Tempe analysed near-infrared spectra of a regions, collected by a Mars Express orbiter. They found fullness bands evil of a iron in volcanic glass, a glossy piece identical to obsidian which forms when magma cools as well quick for a minerals to crystallize (Geology, DOI: 10.1130/G32755.1).
The potion expected takes a form of sand-sized grains, as it does in glass-rich fields in Iceland. The spectra indicate a grains have been coated with silica-rich “rinds”.
On Earth, such rinds cloak volcanic potion weathered by water. How a slick grains shaped upon Mars is unknown, though Horgan says magma from Martian volcanoes interacting with H2O ice and sleet is a possibility. That would have these regions (pictured right) intensity hotspots for visitor hold up since they would have hold chemical-rich H2O – a pass part for life.
tags: Absorption Bands, Alien Life, Arizona State University, Briony, Dark Regions, Grains, Horgan, Infrared Spectra, Jim Bell, Mars Express, Martian Volcanoes, Million Square Kilometres, Northern Lowlands, Obsidian, Red Planet, Rich Water, Silica, Spectral Measurements, Volcanic Glass, Water Ice