Hollandia Barrier

The Hollandia Barrier is a submerged geological formation, typically a coral reef or similar structure, that acts as a natural barrier along coastlines. Located near Hollandia (now Jayapura in Indonesia), it influences local ocean currents and helps protect coastal areas from strong waves and storms. Such barriers are important because they reduce coastal erosion, support marine life, and maintain the health of nearby ecosystems. They are formed over thousands of years through biological growth and geological processes, contributing to the natural stability and resilience of coastal regions.