I'd like earthquakes to cause deep gullies along some mountainsides of my planet. Here on earth, vertical fault scarps can form from earthquakes, but the examples I see online tend to be less gully - like and more sheer face like.
I need gullies. I do not want water to form these gullies. But, I am not certain earthquakes would be realistic.
The tectonics do not need to work the same on my planet, as on Earth, but I would like the idea to be grounded in reality.
Can seismic forces cause a series of regularly occurring large vertical gorge features on mountainsides? Like 100 feet across and forty feet deep; the length of the mountain. Something you would not want to accidentally fall into.
Would rifting be a better geological explanation?