Strike-slip tectonics: Difference between revisions

In detail, many strike-slip faults at surface consist of [[en echelon]] or braided segments, which in many cases were probably inherited from previously formed Riedel shears. In cross-section, the displacements are dominantly reverse or normal in type depending on whether the overall fault geometry is [[transpression]]al (i.e. with a small component of shortening) or [[transtension]]al (with a small component of extension). As the faults tend to join downwards onto a single strand in basement, the geometry has led to these being termed ''flower structure''. Fault zones with dominantly reverse faulting are known as ''positive flowers'', while those with dominantly normal offsets are known as ''negative flowers''. The identification of such structures, particularly where positive and negative flowers are developed on different segments of the same fault, are regarded as reliable indicators of strike-slip.<ref>[http://search.datapages.com/data/doi/10.1306/0C9B2533-1710-11D7-8645000102C1865D Harding, T. P. 1990. Bulletin American Association of Petroleum Geologists. 74]</ref>

 

 

===Strike-slip duplexes===