Landforms
It is the source of the Severn River (Queensland), which is the starting point of the Darling River. The Severn River (Queensland) is a separate river to the New South Wales river of the same name. The river has cut a 10 km long gorge through hard trap rock. Some of the Severn River's tributaries have carved gorges and contain waterfalls.
The area has a complex geological history. Before it was a national park the land was mined for molybdenite, arsenic, tungsten, copper, gold and tin. Disused mines and a treatment plan are contaminated so access in these locations is restricted. Shellfish fossils can be found on the summit of Mount Donaldson which is 1,038 m above sea level. The trap rock which underlays most of the park contains granite intrusions which has caused some fracturing.
Read more about this topic: Sundown National Park