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The experimental rig has two perpendicular (x-y) computer-controlled motors that provide unlimited movement of the right side of the deformation box. |
For extensional experiments, a rubber sheet is glued to the base of the two metal sheets to provide a zone of uniform extensional strain.
| Time 1
Normal faults form over the stretching rubber from small air bubbles |
Time 2
These faults grow in length and develop relay structures |
| Time 3
Low-angle light revelas fault scarps as shadows |
Time 4
In addition to large faults above the rubber sheeting, faults have formed over the metal plates. |
The development of the San Gorgonio knot can be investigated with analog models using both clay and sand.
Setup of basal plates to simulate the southern San Andreas |
A compressional left-over is introduced in the material overlying the plates |
| clay
laser scan of the defrmed clay surface |
sand
laser scan of the deformed sand layer |
