Approximately 250 million years ago, the Robberg Peninsula began to emerge from the depths of the Earth, shaped by powerful geological forces. The peninsula’s distinctive rock formations tell a tale of ancient riverbeds and shifting seas, with some of the oldest and youngest rocks in the world found in close proximity.
The base of the peninsula is composed primarily of Table Mountain quartzite. Reddish-brown, coarse-grained conglomerates of the Enon formation of the Uitenhage Group are also found. Above the quartzite lies a layer of river stone conglomerate, evidence of a time when the peninsula was a riverbed. The top layer, formed around 45,000 years ago, consists of sandstone.
The Robberg Coastal Corridor also bears witness to the ebb and flow of human history. Archaeological evidence reveals that early humans inhabited the area as far back as 164,000 years ago. These early inhabitants, drawn to the abundant marine resources, left behind a legacy of tools, ornaments, and symbolic artifacts in the caves along the peninsula.
Interestingly, during the Pleistocene interglacial highstands, when sea levels were higher than 75 meters, human populations were isolated on the southern Cape Peninsula (SCP) for periods of 360 to 3,400 generations (approximately 9,000 to 85,000 years) due to the rugged mountains of the Cape Fold Belt, as well as climate and vegetation barriers. The SCP expanded five-fold as sea levels fell from 75 to 120 meters.