Martian weird: Tome

Martian weird: Tome
Martian weird: Tome Opportunity used her Microscopic Imager (MI) to take this close-up of Tome in early April 2018. From San Juan Pueblo, a site in the south fork of Perseverance Valley, it is a new kind of rock the likes of which this rover has never seen before. The MER scientists are debating several hypotheses now and are working to figure it out. NASA / JPL-Caltech / Cornell / ASU