Matthew Flinders first sighted the You Yangs in 1803. It is from this point at Flinders Peak, looking toward the Wombat State Forest, that is the birth place of the Werribee River.
The Rowsley Fault occured approximately 1,000,000 years ago. The fault changed the gradient in the Werribee Gorge, cutting the Gorge to its present depth of over 200 feet.
These are trees that have come to the Gorge since white settlement. They include blackwood trees and trees that are often found in the Mallee. A possible reason for this is seeds deposited from bird droppings.
The Werribee River in the base of the Werribee Gorge near Myrniong. The rocks in the river contain white stones mixed with lava, and the white rocks show scratch marks that can be identified under an electron microscope. They indicate these scratch marks were made with pressure from a glacier. These rocks can be found in several other places in the Werribee River over its entire lengh.
