The Keilor archaeological site was among the first places to demonstrate the antiquity of Aboriginal occupation of Australia when a cranium, unearthed in 1940, was found to be nearly 15,000 years old. Subsequent investigations of alluvial terraces revealed hearths about 31,000 years BP, making Keilor one of the earliest sites of human habitation in Australia. Remains of megafauna suggest a possible association with Aboriginal hunting.
The site is located at the confluence of Dry Creek and the Maribyrnong River, 1.5 km north of Keilor, Victoria at 37°42′15″S 144°50′16″E / 37.704297°S 144.837889°ECoordinates: 37°42′15″S 144°50′16″E / 37.704297°S 144.837889°E. The site was found when artefacts were exposed in sand quarries, and as a result of increased bank erosion of the river terraces due to runoff from the then recently opened Tullamarine Airport.
The Keilor cranium was discovered by James White in October 1940 while excavating a sand deposit near the junction of the Maribyrnong River and Dry Creek, about 2 km north of Keilor, Victoria (Mahony 1943:3). Archaeologist Sandor (Alexander) Gallus, was among the first to recognise the importance of the river terraces in the 1960s and 70s and excavated the site with teams from the Archaeological Society of Victoria, the Victoria Archaeological Survey and La Trobe University focusing on the lower stratigraphic layers known as the D-Clay and the underlying Older Dry Creek Alluvium.