Overview and Background

Joint Set Mapping

Joint Set Mapping is an important process for the mapping of joint sets, joints and faults in rock. These are commonly then visually displayed on a stereonet, but it is often difficult to connect the link between a physical joint and the lines drawn to represent it on a stereonet.

Lesson Plan and Activity

Using for lower hemisphere Joint Set Mapping

The file 'jointplane' is designed to represent a joint plane or set. The flat surface represents the plane of the joint, allowing it to be easily visually oriented within the stereonet bowl. The edge of the plane that is within the bowl forms the great circle, which should be drawn on a stereonet. The spike represents the 'pole' of the plane (normal vector), which should be pointed down. the position of the end of this spike is the position the pole should be drawn on at on a stereonet.

Materials Needed

Materials Required for joint set mapping

Compass Clinometer
Appropriate PPE for conditions/location
Printed Stereonet paper

A tape measure can also be useful , especially when doing underground chain surveys.

Skills Learned

Joint Set Mapping
Stereonet drawing

Geological Stereonet Visualiser