Although the vast majority of sites in the Sydney coastal region are found along the Parramatta River and Georges River, Kendrick Park Midden showed that Aboriginal people along the banks of the Cooks River ate very similar types of shellfish.

Shell middens along Cooks River contain a variety of species, especially the Sydney Cockle (Anadara trapezium) and Sydney Rock Oyster (Soccostrea Glomerata) and to a lesser extent Hairy Mussel (Trichomya Hirsuta).

Stone artifacts have been recorded at several coastal sites, some in relative abundance. Early research found that sources of stone suitable for flaking are rare or absent in the coastal region, however, recent research contrasts with this view. A source of silcrete was located at Newtown in 1980.