plural tholi — group of (usually not contiguous) small mountains.
Dorsum — long low range. Name type not present on Mars.
plural dorsa
Patera — dish-shaped depressions on volcano peaks; not very high compared to diameter.
plural paterae
Caveats
Listed are the
elevations of the peaks (the
vertical position relative to the
areoid, which is the Martian
vertical datum — the surface defined as zero elevation by average martian atmospheric pressure and planet radius), which is not the height above the surrounding terrain (
topographic prominence). Listed mons elevation is the highest point (at 16 pixels/degree) within the feature. Listed patera elevation is the average elevation of the shallow dish-shaped depression (the actual 'patera') at the summit.