basalt

What’s on the Inside Counts

This graph shows the chemical composition of the rock at Gusev Crater dubbed 'Mazatzal' after it was brushed and ground…

Keepers of the Hematite

This figure shows spectra taken by NASA's Mars Exploration Rover Opportunity's Moessbauer spectrometer at various spots in 'Eagle Crater.' Top…

A Closer Look at “Mazatzal”

This black and white image of the rock called 'Mazatzal' (top) was taken by NASA's features, including variants in tone,…

Patches of Hematite

These maps, acquired from NASA's Mars Exploration Rover Opportunity prior to the rover's roll-off, show the five locations the rover…

Meridiani’s Autograph

This spectrum of the soil at NASA's Mars Exploration Rover Opportunity's landing site, Meridiani Planum, shows the presence of the…