A left-lateral strike-slip fault is a type of fault where two blocks of the Earth's crust slide past each other horizontally. When standing on one side of the fault, the block opposite appears to move to the left. This movement occurs due to tectonic forces that cause stress in the Earth's crust, leading to earthquakes. These faults are commonly found at the boundaries of tectonic plates, such as those in the San Andreas Fault system in California. Left-lateral strike-slip faults can significantly impact the landscape and are important for understanding geological processes and earthquake risks.