Flower structures develop along strike-slip fault zones where the fault trace is not perfectly straight, creating local zones of either transpression (combined strike-slip motion and compression, at restraining bends or stepovers) or transtension (combined strike-slip motion and extension, at releasing bends or stepovers); transpressional settings produce positive flower structures (upward-diverging, convex-up reverse fault splays creating localized uplift), while transtensional settings produce negative flower structures (downward-diverging, concave-up normal fault splays creating localized subsidence/basin formation).