Mesas and heavily eroded craters in Deuteronilus Mensae
Mesas and heavily eroded craters in Deuteronilus Mensae
The fragmentation and erosion of the old highland area left behind different large mesas. Their plateau-like surfaces represent the remnants of a land surface that once extended much further north. There have probably been several phases of glaciation. Some impact craters in the region, like the one on the left-hand side of this image, have heavily eroded rims and have been completely filled by debris deposited in them. This crater is now barely recognisable as a circular structure.
