‘Halos’ Discovered on Mars Widen Time Frame for Potential Life

$A mosaic of images from the navigation cameras on the NASA Curiosity rover shows “halos” of lighter-toned bedrock around fractures. These halos comprise high concentrations of silica and indicate that liquid groundwater flowed through the rocks in Gale crater longer than previously believed.$

Credit: NASA/JPL-Caltech

A mosaic of images from the navigation cameras on the NASA Curiosity rover shows “halos” of lighter-toned bedrock around fractures. These halos comprise high concentrations of silica and indicate that liquid groundwater flowed through the rocks in Gale crater longer than previously believed.

« ‘Halos’ Discovered on Mars Widen Time Frame for Potential Life

$Bridger Basin observations: Mosaic of the Big Sky and Greenhorn drill sites. The Big Sky sample was collected from outside--and the Greenhorn sample from inside--a fracture-associated halo in the Stimson formation. The ChemCam observations of the mean bedrock silica content are indicated by color-coded dots. Dashed lines indicate the approximate centerlines of the fracture-associated halos.$

Credit: NASA/JPL-Caltech

Bridger Basin observations: Mosaic of the Big Sky and Greenhorn drill sites. The Big Sky sample was collected from outside--and the Greenhorn sample from inside--a fracture-associated halo in the Stimson formation. The ChemCam observations of the mean bedrock silica content are indicated by color-coded dots. Dashed lines indicate the approximate centerlines of the fracture-associated halos.

« ‘Halos’ Discovered on Mars Widen Time Frame for Potential Life

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