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 most well-known example of a strike-slip fault is the San Andreas Fault in California, which has caused significant earthquakes. In a strike-slip fault, the displacement is primarily lateral, meaning that if you were to stand on one side of the fault, you would see the other side move sideways. These faults can be classified into two types: right-lateral and left-lateral, depending on the direction of movement relative to an observer.