Topography

Melbourne is located in the south-eastern part of mainland Australia. Geologically, it is built on the confluence of Quaternary lava flows to the west, Silurian mudstones to the east and Holocene sand accumulation to the southeast along Port Phillip. The city's suburbs extend along the Yarra Valley toward the Yarra and Dandenong Ranges to the east, down towards the Mornington Peninsula and the city of Frankston, along the Maribyrnong River and its tributaries north towards the foothills of the Macedon Ranges, and along the flat volcanic plain country towards Werribee and Geelong to the south-west.