Lesson 1/Learning Event 1
The layout of the quarry depends to a great extent upon the direction of the strike and dip of the material
to be quarried (Figure 3). Strike is the direction of the line of intersection of an inclined layer of rock
with a horizontal plane. Strike is expressed as an azimuth or bearing. Dip is the maximum angular
departure of an inclined bed from the horizontal. It is always measured at right angles to the line of
strike. Dip is expressed in degrees.
FIGURE 3. MEASUREMENT OF STRIKE AND DIP