| Parameters | Healthy basalts | Unfilled fractures | Tension cracks | Fractures filled with calcite, epidote, chlorite | Multiples fractures |
| GSI | 47 | ||||
| s | 0.003 | ||||
| a | 0.5 | ||||
| mi | 25 | ||||
| mb | 3.8 | ||||
| Rc | 85.0 | 86.7 | 75.0 | 64.4 | 93,1 |
| σt | −0.067 | −0.068 | −0.059 | −0.051 | −0.073 |