Rock-fall Hazard Assessment of the Aspen Forest Trail, Navajo National Monument, Arizona

 

Fig. 4 - Markland test plot for planar and wedge failures.

Fig. 4 - Markland test plot for planar and wedge failures. Slope face, friction circle, and critical zone for sliding failure are indicated. Red arrow indicating intersection of great circles for joint sets J1 and J2 outside of critical zone precludes wedge failure of these discontinuities.

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