A flat terrain full of rocks girls (smaller than a handball or handball ball) due to soft mineral (conglomerate, limestone, etc.). Usually easy to navigate, but hunting for the joints. However, if these are lining a slope, the issue was more complicated. Therefore:
- Post is not impossible, but degrades much this type of soil, in addition to fatigue (each step is small collapses beneath our feet that make us somewhat to above).
- Lower when the stones are small, although it is easy (can be sliding, digging their heels, especially on boulders boys) also impacts seriously on this ground, eroding it too much.