The Cooks River Midden is situated on a sandstone ridge overlooking the Cooks River. This is one of the oldest surviving middens discovered to date in the Sydney coastal area. Registered with the New South Wales National Parks and Wildlife Service Aboriginal Heritage Information Management System, Kendrick Park Midden is said to contain stone artifacts made of red silcrete and indurated mudstone.

The shell species discovered represented common Sydney river shellfish with the same species of shell occurring in distinct clusters:

• Hercules Club Whelk (Pyrazus ebeninus)
• Sydney Cockle (Anadara trapezia)
• Sydney Rock Oyster (Saccostrea commercialis)
• Hairy Mussel (Trichomya hirsuta)
• Australian Mud Whelk(Velacumantis australis)
• Black Nerite (Nerita atramentosa)
• Periwinkle (Bembicum auratum)
• Comtesse’s Top Shell (Prothalotia comtessei)

Among these species, the Sydney Rock Oyster and Sydney Cockle were the most common.

The site is located on a hill slope overlooking the Cooks River. Estuarine shell was found over an area 38m x 14m. There is a smaller area (Area 1) within the site that contains high densities of estuarine shell material. The shell in one area has been exposed by earth removal in leveling for a road with masses of European rubbish covering the site.

A stone artifact was found in Area 1. A dark gray/brown sediment overlies the situ shell and forms the matrix to the midden. The lowest section of in situ shell material overlies a sandy clay devoid to shell. Below this clay is sandstone bedrock.

It was noticed during the fieldwork that the same species of shell tended to be found in distinct clusters. One stone artifact, a silcrete flake with a block length of 24mm, was located in Area 1.