Patterned ground in martian high northern latitudes: Morphology and age constraints

► Survey of the martian northern patterned ground terrain edge. ► Abrupt change in terrain type and crater degradation speed observed at 60°N. ► All possible impact structures categorized, small craters scrutinized. ► Patterned ground types correspond to past periods of climate change. ► Crater SFDs indicate very recent and ongoing resurfacing rates.