Discontinuities
The ISRM publication suggested methods for the
quantitative description of discontinuities in rock masses
(ISRM, 1978c) defined 10 parameters to describe the
characteristics of discontinuities:
1. Orientation: The attitude of a discontinuity in
space. It is described by the dip direction (azimuth)
and dip of the line of steepest declination in the plane
of the discontinuity.