Bombo Headland Quarry Geological Site, Nature reserve and geological site in Kiama, Australia

Bombo Headland Quarry is a coastal headland with exposed basalt columns and latite rock formations from different geological periods. The isolated pillars rise from the shoreline and show layers that formed millions of years ago.

In 1979 the Geological Society of Australia nominated Bombo Quarry, and Dr Suzanne Wass of Macquarie University's School of Earth Sciences brought its features to the Heritage Council. The quarry belonged to the Metropolitan Water, Sewerage and Drainage Board, which proposed a pollution control plant on its floor. A Permanent Conservation Order followed in 1983, and the site joined the State Heritage Register on 2 April 1999.

The site's name comes from Bombo, the surrounding locality on the Illawarra coast, not from an Aboriginal word recorded in the sources. Visitors today walk among the grey-black latite columns and the red-brown sandstone platform, and the headland appeared as part of the planet Phaedos in Mighty Morphin Power Rangers: The Movie (1995).

The site sits along Princes Highway and is always open, but wear sturdy shoes for uneven ground. Coastal weather and tides change conditions quickly, especially during high tide or storms.

The rock formations contain fragments from depths of about 80 kilometers and come from Late Permian volcanic activity. This deep origin makes the site a rare window into the continent's early geological history.