| Rock type | O | Structure | F |
| clay stone, slate, marlstone, siltstone | 20 | non‑jointed | 25.0 |
| sandstone, quartzite, volcanic rock, plutonic rockmetamorphic rock | 15 | slightly jointed | 4.0 |
| porous sandstone, porous volcanic rock (e.g. tuff) | 10 | moderately jointed, slightly karstic | 1.0 |
| conglomerate, breccia, limestone, tufaceous limestone, dolomitic rock, gypsum rock | 5 | moderately karstic | 0.5 |