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, depending on the direction of movement. When observing a right-lateral strike-slip fault, the block opposite to the observer moves to the right. Conversely, in a left-lateral strike-slip fault, it moves to the left.