Acidalia Colles [SEP] located on astronomical body
Acidalia Colles
Acidalia Colles is a group of hills in the Mare Acidalium quadrangle of Mars, located at 50.9° north latitude and 23.1° west longitude. It is about long and was named after a classical albedo feature name. The term "Colles" is used for small hills or knobs. Gullies have been observed on Acidalia Colles.
high resolution, the face turned out to just be an eroded mesa. Mare Acidalium contains the Kasei Valles system of canyons. This huge system is 300 miles wide in some places—Earth's Grand Canyon is only 18 miles wide.
Gullies.
The HiRISE image below of Acidalia Colles shows gullies in the northern hemisphere. Gullies occur on steep slopes, especially craters. Gullies are believed to be relatively young because they have few, if any craters, and they lie on top of sand dunes which are themselves young