The Hidden Grand Canyon Beneath Perth

Hidden beneath the waters off Western Australia lies the Perth Canyon — a colossal underwater gorge often called Perth’s Grand Canyon. This blog dives deep into the canyon’s stratigraphy, revealing how ancient rivers, tectonic rifting, and submarine landslides carved one of the largest submarine canyons in the Southern Hemisphere. From the Late Cretaceous formation of the Vlaming Sub-basin to the discovery of fossil coral reefs in its depths, the Perth Canyon tells a 70-million-year story written in stone. Explore how sea level changes, continental drift, and powerful submarine currents shaped this underwater landscape into a geological masterpiece — a time capsule of Australia’s dynamic Earth history.