page_title: Geology of Victoria
section_title: Moyston Fault
hierarchical_section_title: Geology of Victoria / Neoproterozoic to early Carboniferous / Moyston Fault
caption_attribution_description: English: Island Archway on the Great Ocean Road in Victoria, Australia. Taken as a 6 segment panorama showing the surrounding coastline. Français&#160;: Vue panoramique 'Island Archway' et du paysage environnant, vu de la Great Ocean Road dans le Victoria, en Australie. Image obtenue en assemblant six clichés.
context_page_description: Victoria is an Australian state, situated at the southern end of the Great Dividing Range. The Great Dividing Range stretches along the east coast of the continent and terminates near the Victorian city of Ballarat west of the capital Melbourne, though the nearby Grampians may be considered to be the final part of the range. The highest mountains in Victoria are the Victorian Alps, located in the northeast of the state.
  The northwest of the state is mostly Cainozoic rocks while the southeast is primarily made up of Palaeozoic rocks. There have been no discoveries of Precambrian rocks in Victoria.
  The low flat northwest of the state that borders the Murray River was once the bed of an ancient sea and the land is much afflicted with salinity. Saline drainage from Victorian land is one of the sources of the salinity problem in the Murray-Darling River system. Commercial salt evaporation is undertaken near Swan Hill.
  Central and western Victoria comprise world-class vein-hosted gold deposits, hosted mostly in the extensive Ordovician turbidites.
  The southeast of the state has enormous brown coal fields.
context_section_description: The Moyston Fault is the most important fault as it forms the terrane boundary between the Delamerian and Lachlan fold belts. These twofold belts show important differences. The Delamerian Fold Belt is mainly composed of Neoproterozoic-Cambrian rocks and was deformed in the Late Cambrian Delamerian Orogeny whereas the Lachlan Fold Belt contains mainly Cambrian-Devonian rocks with the main deformations occurring in the late Ordovician to early Carboniferous interval. The first regional deformation to affect the Lachlan Fold Belt was the Benambran Orogeny, about 450 MYA, after the Delamerian Orogeny. Granites comprise 20% of the total exposed area of the Lachlan Fold Belt and fall within an age range of 440 to 350 MYA. Volcanics associated with the granites are also widespread and cover an additional 5%. Blocks of older crust consisting of Neoproterozoic-Cambrian rocks, such as the Selwyn Block in central Victoria, were deformed during the late Cambrian Tyennan Orogeny prior to being incorporated into the Lachlan Fold Belt.
caption: Island Archway on the Great Ocean Road in Victoria, Australia. Taken as a 6 segment panorama showing the surrounding coastline.
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