3.9.6 Fault set (Forkastningssett)
3.9.6.1 A fault set is a group of closely spaced, parallel or subparallel faults which can be thought to have formed during the same deformational event (Fig. 17).
3.9.6.2 Fault set, like fault zone, fault system and fault complex, ranks next above fault.
3.9.6.3 The breadth of a fault set is defined by the distance between the outermost of the parallel or subparallel faults which are assumed to be of the same age. No other limitations are placed on the extent of a fault set beyond those which are related to individual faults in the set.
3.9.6.4 The structure is mappable with the help of geomorphological, geological and/or geophysical methods.
3.9.6.5 Individual faults in a fault set may be characterized by having identical or different structural character (see Section 3.9.4.5).
3.9.6.6 A fault set is preferably given an informal name or designation (Section 2.3).
3.9.6.7 A fault set consists of faults formed when the stress field had a certain orientation, and will therefore be made up of a single type of fault -- normal, reverse or lateral.
3.9.6.8 Examples: On Hardangervidda there is a fault set comprised of normal faults which are nearly parallel, strike NE-SW and are of post-Caledonian age (Naterstad et al. 1973, Jorde 1977). Olesen (1985) has described a fault set at Masi in Finnmark consisting of parallel normal faults which are of Late Pleistocene to Holocene age.
3.9.6.9 Key reference: Bates & Jackson (1980).
