The whole series of rocks can best be seen when the water is low. Above the highway bridge, the river flows over Late Proterozoic granite and volcanic rocks. The conglomerate is about 6 m thick, and together with the overlying shales, dips gently northwest. If the water is high, follow the trail up and along the top of the east bank to more steps that go down to the river between the two fossil beds. Trilobites, Kelligrews quarry To collect fossil trilobites from the Manuels River Formation, drive south on Route 60 for 7 km from the junction with Route 2 to Red Bridge Road, and turn left.
Black shale forms the walls of the pit, and there are piles of broken shale on the quarry floor.