Where the two hemispheres of Mars meet, the planet is covered in broken-up terrain: a sign that slow-but-steady flows of icy material once forged their way through the landscape, carving out a fractured web of valleys, cliffs and isolated mounds of rock.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/fracturedice.jpg)
Source:
https://phys.org/news/2019-11-fractured-ice-sheets-mars.html