Topographical context map of Cydonia Mensae
Topographical context map of Cydonia Mensae
The Cydonia region lies slightly to the north of the Martian dichotomy boundary, in the south of Acidalia Planitia. There are numerous mesa-like structures and smaller flat-topped mountains here – the remains of the eroded highland spread over large areas of this region. Some planetary researchers believe that parts of these northern lowland plains were once the bed of an ocean or of lakes, which were then covered by layers of lava or sedimentary deposits several hundreds of metres deep.
