Billions of years of Martian history, worn down and stacked in stone.
Arabia Terra is a vast upland of ancient, heavily eroded cratered terrain straddling the boundary between Mars's northern lowlands and southern highlands. Its softened craters and thick layered sedimentary deposits record billions of years of wind, water, and possibly volcanic ash.
Claim your plot here →Arabia Terra is a transitional region where the old Noachian highlands grade down toward the northern plains. Its craters are unusually degraded and mantled, and many contain striking stacks of layered rock — sediments laid down by wind and water, with some researchers proposing that supervolcanic ash contributed to the layers.
The region's antiquity makes it a magnet for study: rocks here formed when Mars was warmer and wetter, and possible river channels and lake beds hint at flowing water long ago. Arabia Terra is essentially an eroded archive of the planet's earliest chapters.