
The brothers were not happy to accept this law and so decided to capture the three sisters. They fell in love with three men from the neighbouring Nepean tribe, but marriage was forbidden by tribal law. The commonly told legend of the Three Sisters is that three sisters, Wimalah, Meeni, and Gunedoo, lived in the Jamison Valley as members of the Katoomba tribe. Around 200 million years ago, volcanoes erupted through the coal, sandstone and shale layers, forming the ridges and the shape of the Three Sisters. These layers later created rock beds and shales.

When the Blue Mountains were covered in seawater, the ocean carried large amounts of sediment that gradually sunk to the floor in crosswise layers.

The Three Sisters were formed by land erosion around 200 million years ago during the Triassic period when the sandstone of the Blue Mountains was eroded over time by wind, rain and rivers, causing the cliffs surrounding the Jamison Valley to be slowly broken up.
