The Waaipoort formation consists of
mudstones,
siltstones, and fine
sandstones and is around 35 meters thick. Fish-bearing localities are common and in most of these, the fish are present in calcitic or phosphatic nodules. At the Schiethoogte locality in the Eastern Cape, a 15 cm
thick black layer made up of siltstone and fine sandstone contains two horizons where
actinopterygian fossils are closely packed. These are thought to represent mass mortality events. ==Paleoenvironment==