Hamersley River
The headwaters of the river rise east of Fitzgerald and just north of the South Coast Highway on an undulating sandplain on the edge of the Yilgarn plateau and flows in a south easterly direction.The river flows through the Fitzgerald River National Park winding through gorges cut into faults in the quartzite and schist of the Mount Barren formation until discharging into the Hamersley Inlet and on to the Southern Ocean.Hamersley Inlet is a wave dominated estuary approximately 7 kilometres (4 mi) in length with a depth of about 2 metres (7 ft)[3] with a total surface area of 2.9 square kilometres (1 sq mi).[4] The river was named by the explorer and surveyor John Forrest in 1871 while on expedition in the area.The river flows very little under normal conditions but floods infrequently after heavy rain events.