Martian spherules
abundant spherical hematite inclusion, found in situ embedded in a sulfate salt evaporitic matrix or also loose on the surface, discovered by Opportunity at Meridiani Planum on Mars
en-GB/ˈmɑːʃn sfɛɹjuːlz/
abundant spherical hematite inclusion, found in situ embedded in a sulfate salt evaporitic matrix or also loose on the surface, discovered by Opportunity at Meridiani Planum on Mars