90 Fractures and hemispherical projection
terization, as illustrated by the examples in Fig. 7.2, showing quarry
faces and associated line drawings. In the Fig. 7.2a case, the dolomite
fractures are clear, and even the shape of the quarry faces occurs because
of the dominant perpendicular vertical joints. In the Fig. 7.2b case, the
fracturing is more intractable.
It is important, however, in all cases to be able to characterize the
geometry and mechanical properties of the fractures because they are