Geological and climatic processes over millions of years have combined with human activity over tens of thousands of years to shape Mutawintji National Park and its environs. The uplifted rocks that form the spectacular scenery of the national park provide a record of the development of part of the eastern margin of the supercontinent Gondwana, and events until today. The rocks tell a story of volcanic eruptions, intrusions of molten rock (magma), deposition of marine and river (alluvial) sediments, phases of mountain building and extended periods of weathering and erosion. In general, the rocks within the national park increase in age eastward towards the Mount Wright Fault (see map overleaf), a major fracture in Earth’s crust, which has undergone several periods of movement. Faults and smaller folds are responsible for the present distribution of most of the rocks throughout the national park.
Geological Survey of NSW 2020. Geology of Mutawintji National Park, 1:80 000 map (2nd edition). Geological Survey of New South Wales, Maitland, Australia