A strike-slip fault is a type of fault where two blocks of the Earth's crust slide past each other horizontally. This movement occurs due to tectonic forces, often associated with the boundaries of tectonic plates. The displacement is primarily lateral, meaning there is little to no vertical movement. These faults can be classified into two main types: right-lateral and left-lateral. In a right-lateral fault, if you stand on one side, the opposite side moves to the right. Conversely, in a left-lateral fault, the opposite side moves to the left. San Andreas Fault in California is a well-known example of a strike-slip fault.