Candor Chasma
Candor Chasma is one of the largest canyons in the Valles Marineris canyon system on Mars. The feature is geographically divided into two halves: East and West Candor Chasmas, respectively. It is unclear how the canyon originally formed; one theory is that it was expanded and deepened by tectonic processes similar to a graben, while another suggests that it was formed by subsurface water erosion similar to a karst. MRO discovered sulfates, hydrated sulfates, and iron oxides in Candor Chasma.

One of the pictures below shows branched channels. Many places on Mars show channels of different sizes. Many of these channels probably carried water, at least for a time. The climate of Mars may have been such in the past that water ran on its surface. It has been known for some time that Mars undergoes many large changes in its tilt or obliquity because its two small moons lack the gravity to stabilize it, as our moon stabilizes Earth; at times the tilt of Mars has even been greater than 80 degrees 
Q150784
canyon
Concept
Q621110
Valles Marineris
LOC
Q111
Mars
CEL
Q192810
graben
Concept
Q16817
karst
Concept
Q183160
MRO
MISC
Q537969
Candor Chasma
LOC
Q537969
Candor Chasma
LOC
Q537969
Candor Chasma
LOC
+80^^http://www.w3.org/2001/XMLSchema#decimal
80
NUMBER
part of
located on astronomical body
located on astronomical body