Abstract:The importance of strikeslip faulting was recognized near the turn of the century. Riedel shear patterns are commonly observed in the strikeslip fault systems. The basins related to Riedel shear are also documented in different tectonic settings in the world. This paper reviews the characteristics and evolution of Riedel shears in terms of mechanism of simple shear. Based on the data of the core samples at the centimeter scale and the published data about sedimentary basins in nature, the aim of this paper is to propose some patterns of sedimentary basin related to Riedel shears.Results: Three evidences show that the Riedel shear pattern is similar to the faulted basin pattern in a strikeslip fault zone. ①The pattern of Riedel shears is not dependent on the scale observed. The extensional (transtensional) zones in the small strike-slip faults are similar to the basin distributions along large fault zone; ②The depocenter along a fault is the same as the location of maximum fault displacement; The basins commonly show elongated form as the faults. ③The basins related to Riedel shears can be reproduced by physical and numerical experiments. Based on above factors, we proposed six patterns of sedimentary basin related to Riedel shears: en echelon basin, horsetail basin, beaded basin, S-type (Z-type) basin, SymbolxA@ type basin, and complicated lattice basin. ① The width of en echelon basins increases with the increase of shear displacement in the principal shear zone. ②Geometry of horsetail basins and brush basins are similar to each other. The horsetail basins are generally found in the extensional tip zones of a strike-slip fault, whereas the brush basins develop in any place in a shear zone. ③Beaded basins are formed due to extension of releasing zones in the braided strikeslip fault. Individual basin is in the form of lenses. ④ Z-type basins are formed due to sinistral shear and Stype basins are formed due to dextral shear. ⑤ SymbolxA@ -type basins are typical pattern of pull-apart basins in the case of Ls/Ln Symbol|@@ 1, whereas for Ls/Ln Symbol~@@ Symbol~@@ 1, the beaded pattern is expected, where Ls is the transfer length of a pullapart basin and Ln is the spacing between two en echelon fault segments. ⑥ Lattice basins are developed in the distributed shear zones with anastomosing faults. Conclusions:Observations at the centimeter scale show considerable variation in the orientation of synthetic and antithetic Riedel shears relative to a shear zone. Many types of Riedel shear are formed at the centimeter scale. By complying our observations and the published data about the sedimentary basins in nature, we proposed six patterns of the sedimentary basins and their structures relative to the Riedel shears developed in nature.