These are key features of strike-slip systems:
- Strike-slip is driven from the basement. The main faults are steep to more or less vertical and they trend across the country in broadly curving to straight lines. The larger faults may abruptly switch between normal and reverse displacement, from place to place, and their shapes may be complex.
- The local sub-basins are bounded by arcuate steep faults, some of which are extensional and some are thrust surfaces.
- Fault systems open-out upwards and splay. Major folds and faults defining and sub-dividing the basin are sigmoidally curved, and en echelon.
- There is strong structural control on sedimentation at releasing and constraining bends. Younger sequences are locally thrust over older ones, and local unconformities are evident.